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《岩石学报》2016年第32卷第9期发表论文已被Web of Science核心合集收录

注释: Web of Science™ ============================================================

FN Thomson Reuters Web of Science™
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PT J
AU Geng, YS
Shen, QH
Du, LL
Song, HX
AF Geng YuanSheng
Shen QiHan
Du LiLin
Song HuiXia
TI Regional metamorphism and continental growth and assembly in China
SO ACTA PETROLOGICA SINICA
AB Based on compilation of the Metamorphic Geological Map of China (at the scale of 1 : 5 million), we have summarized in this paper the evolutionary history of the major metamorphic belts in China and the intrinsic relationship between the metamorphic belts and continental formation and evolution in China. Although the North China and South China cratons keep the metamorphic ages from Paleoarchean to Mesoarchean, it is difficult for us to trace the link between the original metamorphism and tectonic setting due to intensive overprinting of late deformation and metamorphism. Late Neoarchean to Early Paleoproterozoic metamorphism is extensive in the North China Craton which displayed the anti-clockwise P-T paths following the widespread TTG magmatism, suggesting that mantle plumes led to the magmatism and metamorphism. The Late Paleoproterozoic metamorphic events, occurring widely in North China, South China and Tarim cratons, are represented by the high-pressure granulite facies metamorphism with clockwise P-T path and are similar to the metamorphic events in typical orogens in Columbian supercontinent of the same period. However, there are still some different aspects in time and space for the three cratons (North China, South China and Tarim cratons) during their amalgamation with Columbian supercontinent. South China craton is relatively young and was assembled by Yangtze and Cathaysia blocks along the Jiangnan Orogen in Neoproterozoic. Younging of magmatism and decreasing intensity of metamorphism from the northeast to southwest along the Jiangnan Orogen reflected the migration of orogenic process in this belt. After formation, the South China Craton underwent the Caledonian and Indosinian metamorphism from the northwest to southeast along its' southeastern margin, but the tectonic settings for metamorphism are unclear. The amalgamation of the North China and South China cratons initiated along the western Kunlun-North Qilian-North Qinling-Tongbai belt, and metamorphism along this belt was represented by the Early Palaeozoic blueschist and eclogite facies, indicating the evolutionary process from subduction to continent-continent collision. In the eastern China, the North China and South China cratons amalgamated along the Dabie-Sulu Orogen in Indosinian, when the blueschist and eclogite facies rocks occurred at the south and north of the belt, respectively, suggesting the South China Craton subducted beneath the North China Craton. Coesite is widely distributed in this ultra-high pressure belt, implying the large scale continental subduction. The Central Asian Orogenic Belt, located to the north of the North China Craton and Tarim Craton, contains several metamorphic belts from Early to Late Paleozoic with local blueschist facies metamorphism, which indicate that the Central Asian Orogenic Belt is an orogenic region including several metamorphic belts of different stages of metamorphism. However, the time and space evolution of this metamorphic belt still need further research. The Tibet Plateau metamorphic belts change from old to young in space from north to south. The northern most Indosinian Lungmu Co-Shuanghu-Lancangjiang metamorphic belt represented the collisional process of Paleo-Tethys. The north Yanshanian Bangong Co-Nujiang metamorphic belt and the middle Early Himalayan Yarlung Zangbo belt exhibited two collisional processes of Neo-Tethys. However, the south High Himalayan metamorphic belt in Late Himalayan represented quick uplift process resulted from the north-ward subduction of the Indian Plate to Eurasia Plate.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2579
EP 2608
UT WOS:000385210900001
ER  

PT J
AU Li, SZ
Zhao, SJ
Li, XY
Cao, HH
Liu, X
Guo, XY
Xiao, WJ
Lai, SC
Yan, Z
Li, ZH
Yu, SY
Lan, HY
AF Li SanZhong
Zhao ShuJuan
Li XiYao
Cao HuaHua
Liu Xin
Guo XiaoYu
Xiao WenJiao
Lai ShaoCong
Yan Zhen
Li ZongHui
Yu ShengYao
Lan HaoYuan
TI Proto-Tehtys Ocean in East Asia (I) Northern and southern border faults and subduction polarity
SO ACTA PETROLOGICA SINICA
AB The Proto-Tethys Ocean is a complicately-originated oceanic basin originated from Supercontinent Rodinia breakup and existed from Neoproterozoic to the end of the Early Paleozoic. It was located in the range of north of the Yunnan-Burma-Thailand/Baoshan (Sibumasu) micro-continental blocks and south of the Tarim-North China Block. There is still controversy for a long time on the southern and northern border faults and the late Early Paleozoic subduction polarity of the Proto-Tethys Ocean. It is important for understanding tectonic background, restoration and reconstruction of Supercontinent Pangea assembly. Therefore, this paper used the integrated methods for the latest results of field geology, tectonics, magmatism, sedimentology, geochemistry and tectonic chronology and tomographic imaging, to identify the positions of the southern and northern border faults of the Proto-Tethyan Tectonic Domain, and determine the subduction polarity of the Proto-Tethys Ocean. Integrated analysis results show that to the north is bounded by the paleoLuonan-Luanchuan Suture (or Kuanping Suture) and its extension to West Kunlun; the southern boundary is the Longmu CoShuanghu-Changning-Menglian Suture. The Tarim-Alax-North China Block in the north of the Proto-Tethys Ocean had a southward subduction polarity and collided with the Gondwana along the northern margin of the Gondwana in the Early Devonian, forming a giant orocline now preserved in the Qilian-Altyn Tagh-Qaidam segment of the Central China Orogen. The south branch of the Proto-Tethys Ocean may be closed, making the Greater South China Block including the North Qiangtang, Ruoergai, Yangtze and Cathaysia, Bureya-Jiamusi and Indochina blocks a southward subduction and accretion to the northern margin of the Gondwana in Devonian.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2609
EP 2627
UT WOS:000385210900002
ER  

PT J
AU Li, SZ
Zhao, SJ
Yu, S
Cao, HH
Li, XY
Liu, X
Guo, XY
Xiao, WJ
Lai, SC
Yan, Z
Li, ZH
Yu, SY
Zhang, J
Lan, HY
AF Li SanZhong
Zhao ShuJuan
Yu Shan
Cao HuaHua
Li XiYao
Liu Xin
Guo XiaoYu
Xiao WenJiao
Lai ShaoCong
Yan Zhen
Li ZongHui
Yu ShengYao
Zhang Jian
Lan HaoYuan
TI Proto-Tehtys Ocean in East Asia (II) : Affinity and assmbly of Early Paleozoic micro-continental blocks
SO ACTA PETROLOGICA SINICA
AB In the Proto-Tethys Ocean there are many microcontinents/continents such as the Tarim, Qilian, Qaidam, Yangtze and Cathaysia, Indochina, Lanping-Simao (Sibumasu) blocks/micro-continental blocks, between most of these blocks developed a series of ophiolite belts or high-pressure and ultrahigh-pressure metamorphic belts at the end of the Early Paleozoic. Obviously, the Proto-Tethyan tectonic domain underwent the complex ocean-continent configuration, break-up and assembly processes from Supercontinent Rodinia's breakup to Supercontinent Pangea's assembly. However, so far their attribute, affinity and collision process among different continents/microcontinents in the Proto-Tethys Ocean remain much controversy. This is critical for restoration and reconstruction of tectonic background of Supercontinent Pangea assembly. Therefore, this paper adopts the comprehensive tectonic comparison method in order to establish affinities and ocean-continent configuration of the Proto-Tethys Ocean and the related continental block/micro-continental blocks, and determine the timing and sequences of assembly among these Proto-Tethyan micro-continental blocks. The results show that, the North China Block had not affinitive relation to the Gondwana, the other continents/micro-continental blocks such as the Yangtze, Cathaysia, Tarim, Qaidam, Alax, North Qinling-Central Qilian-Central Altyn, Oulongbuluke, North Qiangtang, South Qiangtang, Lhasa, Lanping-Simao and Indochina have an affinity to Gondwana in the earlier of Early Paleozoic. During about 450 similar to 400Ma these series of continental blocks/micro-continental blocks experienced gradually southward subduction and accretion to the eastern segment of the northern margin of the Gondwana, resulting in the Proto-Tethys Ocean closure and one supercontinent called Proto-Pangea. The Tarim-North China Block and the Greater-South China Block separated from the Proto-Pangea since 380Ma to result in formation of the Mianlue and the Paleo-Tethys oceanic crusts. Until 240 similar to 220Ma they assembled northward gradually to develop eventually the Laurasia. At this time, it resulted in the formation of the Supercontinent Pangea.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2628
EP 2644
UT WOS:000385210900003
ER  

PT J
AU Zhao, SJ
Li, SZ
Yu, S
Li, XY
Cao, HH
Liu, X
Wang, PC
AF Zhao ShuJuan
Li SanZhong
Yu Shan
Li XiYao
Cao HuaHua
Liu Xin
Wang PengCheng
TI Proto-Tethys Ocean in East Asia (III) Structures of ductile shear zones in the North Qinling
SO ACTA PETROLOGICA SINICA
AB The North Qinling orogenic belt, located in the junction zone between the North China Block and the South Qinling micro-continental block, is a key area to study the tectonic evolution of the Proto-Tethys Ocean. The North Qinling orogenic belt mainly developed four ductile shear zones, including the Luonan-Luanchuan and the Shangdan shear zones which bound the orogenic belt, and the Guanpo-Qiaoduan and the Zhuyangguan-Xiaguan shear zones in the interior of the orogenic belt. Based on detailed analysis of filed and microscopic observations and EBSD fabric analysis for quartz, structures of the four shear zones could be obtained: (1) after the collision between the North China Block and the North Qinling micro-continental block in the Early Paleozoic, the Luonan-Luanchuan, Guanpo-Qiaoduan and Zhuyangguan-Xiaguan shear zones started their activities during the exhumation process; (2) after similar to 380Ma, the relationship between the North China and the South China blocks was changed from a generally east-west trend to a generally north south trend due to their northward drifting, resulting in the dextral shearing of the Luonan-Luanchuan and the Shangdan shear zones; (3)similar to 320Ma, the scissors-type closure between the North China Block and the South Qinling micro-continental block led to the dextral shearing of the Luonan-Luanchuan shear zone and the sinistral shearing of the Shangdan shear zone. However, the Guanpo-Qiaoduan and the Zhuyangguan-Xiaguan shear zones performed as sinistral and dextral shearing, respectively, due to the adjustment among different lithotectonic units in the North Qinling orogenic belt.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2645
EP 2655
UT WOS:000385210900004
ER  

PT J
AU Liang, CY
Liu, YJ
Li, WM
Yang, SY
Wen, QB
Li, J
Mi, XN
Zhang, L
AF Liang ChenYue
Liu YongJiang
Li WeiMin
Yang ShuYan
Wen QuanBo
Li Jing
Mi XiaoNan
Zhang Li
TI Ductile deformation and rock rheological characteristics from southern Yiwulushan metamorphic core complex
SO ACTA PETROLOGICA SINICA
AB The southern Yiwulushan metamorphic core complex in Zhangjiabao area represents two suits of granitic rocks: Archean granitic gneiss which contains abundant biotite plagioclase gneiss enclaves; late intrusive K-feldspar granitic gneiss and granitic dykes. Detailed macroscopic and microscopic structural investigations indicate two ductile deformation events which developed in these granitic rocks: Late Jurassic ductile shear zone under high deformation temperature of about 550 similar to 600 degrees C, and Early Cretaceous ductile shearing under low deformation temperature about 400 similar to 450 degrees C. Early deformation event was mainly formed under the condition of upper greenschist to lower amphibolite facies, which in simple dominated shearing with L = S and LS tectonites with dextral shearing characteristics. Late ductile deformation event was formed under greenschist facies metamorphism, consisting mainly of equally simple and pure shearing with L = S tectonites with sinistral shearing features. The estimation of rock rheological parameters from dynamically recrystallized grain sizes of quartz indicates that early high temperature shear zone have a lower paleo-stress with higher strain rates, and opposite features exist in late lower temperature shearing. Late Jurassic extensional deformation might be related to Izanagi Plate and Farallon Plate NNW obliquely subducting under the eastern margin of Eurasia plate. The late deformation event, occurred in Early Cretaceous, which is related to the lithospheric thinning and extension of the North China Craton triggered by roll-back of the Izanagi Plate beneath the eastern North China Craton.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2656
EP 2676
UT WOS:000385210900005
ER  

PT J
AU Li, G
Liu, ZH
Cui, WL
Bai, XD
AF Li Gang
Liu ZhengHong
Cui WeiLong
Bai XiangDong
TI Emplacement of Early Cretaceous syn-extension granitic in Yiwulushan area, North China
SO ACTA PETROLOGICA SINICA
AB The Shishan pluton formed at about 124Ma is the syn-tectonic granite of Early Cretaceous extension with NWW shear sense in Yiwulushan area. The major and trace element of the granite shows the characteristics of adakites. The high concentration of SiO2, Al2O3, and alkaline content, and low Fe2O3T and MgO concentration, indicate the magma may be come from the partial melting of crustal rocks. In addition, the magmatic zircons have epsilon(Hf)(t) values from -26.7 to -20. 3 and t,, are between 2. 0Ga and 2. 3Ga indicate the adakitic magma was derived by partial melting of the lower part of the thickened crust of North China block. The magma emplacement of Shishan pluton has three stages could be identified by the analyses of the deformed fabrics from wall rocks and magmatic fabrics from the granites. The Shishan pluton shows a horizontal shape with the subrotund outcrop at major part and two banded granitic dikes at western part, which is the result of diapirism and ballooning of magma and the stretched shear of wall rock. We suggest that the extension at shallow crust could control the emplacement and shape of the pluton. But the partial melting of lower crust has no direct relationship with the shallow extension, instead, the lithospheric thinning and the field of regionally extensional stress may be the cause of partial melting.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2677
EP 2689
UT WOS:000385210900006
ER  

PT J
AU Guan, QB
Li, SC
Zhang, C
Shi, Y
Li, PC
AF Guan QingBin
Li ShiChao
Zhang Chao
Shi Yi
Li PengChuan
TI Zircon U-Pb dating, geochemistry and geological significance of the I type granites in Helong area, the eastern section of the southern margin of Xing-Meng Orogenic Belt.
SO ACTA PETROLOGICA SINICA
AB Petrography, geochemical data, LA-ICP-MS zircon U-Pb dating and Sr-Nd isotopic have been obtained from Bajiazi pluton and Yongxin pluton in Helong area, with the aim of constraining the tectonic nature of the eastern section of the southern margin of Xing-Meng Orogenic Belt. LA-ICP-MS zircon U-Pb age data indicate that the quartz diorites from Bajiazi pluton formed during the early period of Late Permian and monzogranites from Yongxin pluton formed during Middle Triassic. Furthermore, Bajiazi quartz diorites belong to calc-alkaline, metaluminous I-type granitoids with feature of Na2O content is higher than K2O. They also show strong enrichment in LREEs and LILEs (Cs, Ba, K and Sr), depletions in HREEs and HFSEs (Nb, Ta and P). Combined the Sr-Nd isotopic data indicate the primary magma for Bajiazi pluton could be mainly derived from partical melting of the mafic lower crust under the tectonic setting of subduction. The Yongxin monzogranites belong to high-K calc-alkaline, metaluminous-weakly peraluminous I type granitoids with features of rich in SiO2, Al2O, and K2O. They also show strong enrichment in LREEs and LILEs (Cs, K and Sr), depletions in HREEs and HFSEs (Nb, Ta, Ti and P). Combined the Sr-Nd isotopic data indicate the primary magma for Bajiazi pluton could be mainly derived from partical melting of the mafic lower crust under the tectonic setting of syn-collision. The emplacement timing of Bajiazi pluton and Yongxin pluton reflect the Paleo-Asian oceanic plate had been subducting beneath the eastern section of the northern margin of the North China Plate during the early period of Late Permian, and the collision between North China Plate and Khanka Massif took place at the Middle Triassic, which suggests that the Paleo-Asian Ocean closed is between the end of Late Permian and Early Triassic.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2690
EP 2706
UT WOS:000385210900007
ER  

PT J
AU Jiang, H
Liu, JL
Zhang, JY
Zheng, YY
AF Jiang Hao
Liu JunLai
Zhang JuYi
Zheng YuanYuan
TI The deformation of granitic rocks in the Jinzhou detachment fault zone, southern Liaoning: Microstructures, fabrics and geochronology analysis
SO ACTA PETROLOGICA SINICA
AB Granitic plutons and dykes are widely distributed in the mid-lower crustal ductile shear zones. How to distinguish pre-, syn- and post-shearing intrusions and the relation between magmatic activity and tectonic deformation are persistent questions. This paper focuses on deformation of granitic rocks which were sheared at different stages of lithospheric extension along the Liaonan Jinzhou detachment fault zone. Macro-microscopic structural analysis, quartz EBSD fabric analysis and zircon LA-ICP-MS U-Pb dating are applied so that we can enrich our understanding of the relation between magma emplacement and regional deformation. The pre-shearing granites were intensely deformed. Solid-state deformation was imposed onto early high temperature magmatic fabrics. The syn-shearing granites vary in strain history because of the relative timing of their emplacement with respect to ductile shearing. The late syn-shearing granites may only show weak intragranular plastic deformation, while the early syn-shearing granites possess magmatic, or high to mid temperature solid-state deformation features formed during cooling. The quartz CPO's of pre- and syn-shearing granites are characterized by high-temperature fabrics superimposed by low-temperature fabrics. The post-shearing granites show no or weak intracrystalline deformation. The quartz CPO fabrics are either low-temperature fabrics or random fabrics. Zircon U-Pb geochronology dating was conducted on five typical samples and the results support their structural timing. The macro-microstructure and fabric analysis combined with the geochronology dating give us a better understanding of the tectono-magmatic activity stages in Liaonan metamorphic core complex, including the initial extension stage in 134Ma to 130Ma, the peak tectono-magmatic activity stage in 130Ma to 115Ma and the cessation of the detachment faulting after 115 Ma.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2707
EP 2722
UT WOS:000385210900008
ER  

PT J
AU Pei, L
Liu, JL
AF Pei Lei
Liu JunLai
TI Structural deformation characteristics and geochronological constraints on the early deformation of Sihetang ductile thrust shear zone in Yumnengshan, northern Beijing
SO ACTA PETROLOGICA SINICA
AB The Yunmengshan complex is a typical structural unit that records the complicated Late Mesozoic tectonic evolution of the North China Craton. The major structural elements of the complex mainly include the Sihetang anticlinal nappe, the Sihetang ductile shear zone, the Yunmengshan antiform, the Shuiyu ductile shear zone and the Hefangkou normal fault. The timing of thrust shearing along the Sihetang shear zone and its relationship with the Shuiyu shear zone has been debated for decades. Granitic dykes of various stages are widespread along the Sihetang shear zone. Based on studies of the shear deformation characteristics and the relationship between the granitic dikes and tectonic deformation in the Sihetang shear zone, we grouped these dikes into three categories: pre shearing dikes, syn-shearing dikes and post -shearing dikes. Zircon U-Pb dating reveals that the granitic dykes have crystallization ages from ca. 170Ma to 150Ma. From the structural relationships of the dykes with wall rocks we would argue that the early evolution of the Sihetang ductile shear zone may date back to ca: 170Ma and lasted to 150Ma.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2723
EP 2738
UT WOS:000385210900009
ER  

PT J
AU Liu, J
Liu, ZH
Li, SC
Zhao, C
Wang, CJ
Peng, YB
Yang, ZJ
Dou, SY
AF Liu Jin
Liu ZhengHong
Li ShiChao
Zhao Chen
Wang ChuJie
Peng YouBo
Yang ZhongJie
Dou ShiYong
TI Geochronology and geochemistry of Triassic intrusive rocks in Kaiyuan area of the eastern section of the northern margin of North China.
SO ACTA PETROLOGICA SINICA
AB This paper has reported the petrography, geochemistry and geochronology of Jianshanzi, Baoxing and Shudetun plutons in the Kaiyuan area of the eastern section of the northern margin of North China, and discussed their formation age, rock genesis and tectonic environment. Zircon U-Pb dating results show that Jianshanzi pluton was formed in Early Triassic (251 +/- 1. 3 Ma), Baoxing pluton was formed in Middle Triassic (235 +/- 1. 3Ma) and Shudetun pluton was formed in Late Triassic (224 +/- 1. 9Ma). The Jianshanzi pluton is dominated by adamellite, with high Si and low Mg content, and belonged to calc-alkaline series. This unit is enriched in the light ion lithophile elements (e. g., Rb, K, Ba and Th) but is relatively depleted in the high field strength elements (e. g., Ta, Nb, Hf and Zr). They have (Eu values of 0. 55-1. 87 and high (La/Yb) N values of 6. 23-47. 9. These characteristics indicate that the Jianshanzi adamellites have fractionated REE compositions that are enriched in the light REE (LREE) and depleted in the heavy REE (HREE). The Baoxing pluton is dominated by granodiorite. This granodiorite is calc-alkaline, with Si02 concentrations of 52. 36% 74. 06%, Al2O3 of 14. 5% - 17. 34% and MgO of 0. 61% - 3. 66%. In addition, this unit is enriched in the light ion lithophile elements (e. g., Rb, K, Ba and Th) and is relatively depleted in the high field strength elements (e. g., Ta, Nb, P and Ti). Furthermore, these samples have negligible Eu anomalies and (La/Yb) N values of 6. 81 +/- 25. 6. These characteristics indicate that the Baoxing granodiorites have fractionated REE compositions that are enriched in the LREE and depleted in the HREE. The Shedetun pluton is dominated by diorite, with low Si and high Mg content. This diorite is enriched in K and depleted in Na, with K2O/Na-2 ratios of 0. 33 similar to 0. 76, and belonged calc-alkaline series. In addition, the Baoxing pluton is enriched in the light ion lithophile elements (e. g., Rb, K, Ba and Th) and is relatively depleted in the high field strength elements (e. g., Ta, Nb, P, Ti, Hf and Zr). The Shudetun pluton has negligible Eu anomalies and (La/Yb), values of 3. 87 similar to 10. 2, with no obvious fractionation of LREE and HREE. According to the above research, the original magma of the Jianshanzi and Baoxing pluton are originated from partial melting of the lower crust basic rocks, but the Shudetun pluton are originated form depleted mantle wedge. The Triassic magmatites of study area are formed in compressional environment of orogenic stage. Meanwhile, extrusion and collision of the eastern section of the northern margin of North China was lasted to Late Triassic (224Ma). The tectonic transformation of orogenic stage and post orogenic stage (extrusion crustal thickening transition to extensional collapse environment) occurred between Late Triassic and Early Jurassic (224 similar to 180Ma), and also means that lithospheric thinning or destruction might begin in Late Triassic to Early Jurassic (224 similar to 180Ma).
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2739
EP 2756
UT WOS:000385210900010
ER  

PT J
AU Liu, ZH
Wang, C
Song, J
Gao, X
Sun, LN
AF Liu ZhiHong
Wang Chao
Song Jian
Gao Xiang
Sun LiNan
TI Ar-40-Ar-39 dating and its tectonic significance of the Hulan Group at the northern margin of the North China Plate
SO ACTA PETROLOGICA SINICA
AB The Hulan Group, outcropped along the northern margin of the North China Plate in Hongqiling-Hulan area of central Jilin Province, consists mainly of felsic volcanic and sedimentary rocks with low greenschist to amphibolite facies metamorphism and multiple phases of deformation. Most parts of the stratigraphic sequence of the Hulan Group were severely damaged. The observed "bedding" in the field is actually mostly foliation formed by displacement. The majority of the lithologic boundaries are in fact structural interface. The Hulan Group is possibly a suit of m lange consisting of a series of mutual tectonic slices in a stacked configuration. Hulan Group underwent two stages of ductile deformations: the early stage showed thrusting from NNE to SSW in the NNE-SSW trending compression; the late stage showed mainly dip-slip from SW to NE in the NE-SW extension. We have acquired Ar-40-Ar-39 plateau ages of 220. 23 +/- 2. 15Ma and 221. 31 +/- 2. 6Ma for muscovite from the muscovite-quartz schist and garnet-muscovite schist, respectively, in strong deformation zone in the Hongqiling area. Consequently, the age of similar to 220Ma could represent the postorogenic extension time for the collision orogenic belt at the northern margin of the North China plate.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2757
EP 2764
UT WOS:000385210900011
ER  

PT J
AU Dong, XJ
Wang, WQ
Sha, Q
Zhang, JF
AF Dong XiaoJie
Wang WanQiong
Sha Qian
Zhang JinFeng
TI Suzy volcanic rocks in the northern margin of the North China Craton and its formation mechanism
SO ACTA PETROLOGICA SINICA
AB This paper reports the petrology, geochemistry, geochronology and zircon Hf isotope composition of Suzy volcanic rocks, located in Xijingzi, the north of fining, with the aim of constraining the tectonic nature of the of the northern margin of the North China Plate in Late Paleozoic. Suzy volcanic rocks are composed of rhyolite, rhyolitic pyroclastic rocks and a small amount of andesite. Zircons from the volcanic rocks in Suzy formations are euhedral in shape and display fine-scale oscillatory zoning. Zircon dating show that, Suzy volcanic rocks formed in the Early-Middle Permian (267 +/- 2Ma, 272 +/- 2Mo and 270 +/- 3Ma), which is consistent with the formation age of intrusions distribution in the region. Suzy acidic volcanic rocks characterized with high content of Si02 (71. 10% 76. 01%), Al2O3, (12.60% - 14. 33%), very low Me (8.2-17. 9) values, and display enrichment in LREE and LILE, depletion in Nb, Ta, Ti, similar chemically to those from an active continental margin setting. Zircons from the Suzy volcanic rocks exhibit negative eof(t) values from -17. 3 to -5. 9, old Hf isotopic tDm2 from 2386Ma to 1667Ma, indicating that Suzy volcanic rocks were derived from partial melting of ancient crustal material. Its formation may be related to an Andean-type subduction. It' s confirmed there is a hundreds of kilometers long volcanic belt of Late Paleozoic in the central-northern margin of the North China Craton (NCC) by geological mapping. Its formation relates to the subduction of the Paleo-Asian Ocean beneath the NCC and there is an Andean-type active continental margin in the northern margin of the NCC.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2765
EP 2779
UT WOS:000385210900012
ER  

PT J
AU Zhang, JF
Bai, XH
AF Zhang JinFeng
Bai XinHui
TI The Early Carboniferous volcanic rocks in Ondor Sum area of Sonid Right Banner, Inner Mongolia: Discovery and its tectonic significance
SO ACTA PETROLOGICA SINICA
AB A set of foliated andesite and altered rhyolite were found in Ondor Sum area of Sonid Right Banner, Inner Mongolia, zircons from andesite yielded Pb-206/U-238 age of 333 4Ma. The volcanic rocks can be divided into basalt-andesite and dacite-rhyolite. The basalt-andesite volcanic rocks have SiO2 = 47. 40% similar to 62.75%, Mg-# =17.2 similar to 25. 6, belonging chemically to the tholeiitic series; TREE is low, general trend display flat REE pattern, REE fractionation is not clear, and not obvious in Eu anomalies (delta Eu =1.22 similar to 1. 46). The rocks have experienced strong schistosity and alteration, LILEs prone to active migration, change is larger, but the overall state of enrichment, and depletion in Ta, Nb and Ti, similar chemically to a island arc volcanic rock. We consider that its primary magma could be derived from partial melting of a depleted lithospheric mantle. The dacite-rhyolite volcanic rocks have SiO2 = 63. 50% - 79. 80%, relative enrichment in LILEs and depletion in HFSEs(such as Nb, Ta and Ti) and Sr, P, similar chemically to those from an active continental margin setting, the original magma should be partial melting of the crust material. Above all, we believe that during the Early Carboniferous, the subduction of the Paleo-Asian oceanic plate happened in the northern margin of the North China Plate, and the closing time of the Paleo-Asian Ocean should be later than the Early Carboniferous.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2780
EP 2792
UT WOS:000385210900013
ER  

PT J
AU Li, SC
Li, YF
Wang, XA
Zhu, K
AF Li ShiChao
Li YongFei
Wang XingAn
Zhu Kai
TI Delineation of the Late Triassic granitic pluton from the middle part of Greater Xing' an Mountains showing tetrad REE patterns and its geological implications.
SO ACTA PETROLOGICA SINICA
AB The Budunhua pluton is located in the Horqin Right Wing Middle Banner, eastern part of the Central Asia Orogenic Belt. The pluton is mainly composed of medium-fine grained two-mica granites and porphyritic fine-grained muscovite granites. The LA-MCICP-MS U-Pb dating of the zircons indicate that the Budunhua pluton was emplaced in the Late Triassic. The rocks have high SiO2 (73.73% similar to 78. 33%) and(Na2O + K2O) ( 7. 07% similar to 9. 06%) contents, poor CaO (0. 01% similar to 0. 87%) and MgO ( 0. 12% 0. 52%) contents, A/CNK = 1. 02 similar to 1. 23, belong to high-K calcalkaline series. The petrogeochemistry of rare earth element is characterized by strong depletion of Eu, and showing an M-type tetrad pattern. These characteristics indicate that the Budunhua pluton belongs to highly fractionated I-type granites. Zircon epsilon(Hf)(t) values for the Budunhua pluton range from 7. 0 to 12. 4, two-stage model ages (t(DM2)) ranging from 812Ma to 473 Ma. Combining with regional geologic data, the primary magma of Budunhua pluton was derived from partial melting of juvenile crustal material from Neoproterozoic to Early Paleozoic, and formed in the extensional tectonic environment after the closure of the Paleo-Asian Ocean. The tetrad effect granite in Budunhua area with high 1REE and evolution occurred after the intrusion of the primary magma, suggesting that the granite have prospects of REE mineralization.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2793
EP 2806
UT WOS:000385210900014
ER  

PT J
AU Zhao, YL
Li, WM
Wen, QB
Liang, CY
Feng, ZQ
Zhou, JP
Shen, L
AF Zhao YingLi
Li WeiMin
Wen QuanBo
Liang ChenYue
Feng ZhiQiang
Zhou JianPing
Shen Liang
TI Late Paleozoic tectonic framework of eastern Inner Mongolia: Evidence from the detrital zircon U-Pb ages of the Mid-late Permian to Early Triassic sandstones
SO ACTA PETROLOGICA SINICA
AB The studied Hexigten Banner-Lixin-Ar Horqin Banner-Jarud Banner-Suolun-Moguqi areas in eastern Inner Mongolia, tectonically locate between the Xar Moron suture zone and the Hegenshan-Heihe suture zone, and belong to the eastern segment of the Central Asian Orogenic Belt (CAOB) between the North China and Siberia cratons. These areas significantly preserved records related to the Late Paleozoic closure of the Paleo-Asian Ocean, as well as the information of tectonic evolution of the Xar Moron suture and the Hegenshan-Heihe suture. This study focuses on the researches of detrital zircon LA-ICP-MS U-Pb ages of the Mid -late Permian to Early Triassic sandstones derived from the above mentioned areas. Petrologically, the detrital compositions indicate that the investigated sandstones are immature, probably due to the results of rapid erosion, transport, and diagenetic process and nearly supplying derived from the source. Additionally, the abundance of volcanic lithic significantly reveals the magmatic provenance mainly dominated. Meanwhile, the cathodoluminescence (CL) images of analyzed zircons and their Th/U ratios also imply the igneous origin. By combining our new geochronological data with previously reported data, total 2533 detrital zircon U-Pb ages are compiled and show three distinct dominant populations of ca. 230 570Ma (peak at ca. 270 similar to 315Ma, 430Ma and 500Ma), ca. 700 similar to 1100Ma (peak at 970Ma) and > 1500Ma (peak at ca. 1800Ma and 2500Ma). The peak ages of ca. 1800Ma and 2500Ma are considered as typical age members of the North China Craton basement, suggesting the possible provenance derived from the North China Craton. Moreover, the other two age populations are closely consistent with the timing of magmatic events took place in the Erguna-Xing' an-Xilinhot blocks to the north of the Xar Moron suture zone. In comparison with variation trends of detrital components in sandstones which expose in the different regions (including, from southwest to northeast, the Hexigten Banner-Lixin area, the Ar Horqin Banner-Jarud Banner area and the Suolun-Moguqi area) with varying deposited time ranging from Mid -late Permian to Early Triassic, reveal that the scissorlike' closure process of the Paleo Asian Ocean, from west to east, and the terminated at least last to Early Triassic. In addition, the relative stable sources supplying of the Mid -late Permian to Early Triassic sandstones in the Suolun-Moguqi area, indicates that the Erguna-Xing' an block and Songliao-Xilinhot block has already collided along the Hegenshan-Heihe suture zone at the time before Mid Permian deposits, should be as the previous report that of end of Early Carbonadoes.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2807
EP 2822
UT WOS:000385210900015
ER  

PT J
AU Han, X
Pei, L
Zheng, YY
Liu, JL
AF Han Xin
Pei Lei
Zheng YuanYuan
Liu JunLai
TI Zircon U-Pb geochronology and geochemistry of charnockitic rocks from Qian' an in the northern part of North China Craton: Implications for petrogenesis and tectonic setting.
SO ACTA PETROLOGICA SINICA
AB Charnockite, one of the dominant lithologies in many Precambrian high-grade metamorphic terranes around the world, provides important clues for the history and mechanism of early crustal growth. However, its genesis is still debated. Charnockitic rocks in Qian' an are outcropped in eastern Hebei, in the northern part of the Eastern Block of the North China Craton. LA-ICP-MS U-Pb dating of zircon grains from the charnockitic rocks shows that 22 dated spots can be subdivided into two groups. A first group of 6 spots with a weighted mean age of 2544 similar to 22Ma is suggested to represent the ages of magmatic crystallization. Another group of 16 spots is interpreted to represent a later thermal event, attesting to a major phase of a metamorphism during 2439 similar to 2501Ma, with a weighted mean age of 2475 similar to 87Ma, subsequent to the Late Neoarchean magmatism. The charnockitic rocks have SiO2 of 59. 14% 66. 97%, MgO of 1.62% 3. 12%, with enrichment in Ba (574 x 10(-6) - 1572 x 10(-6) LREE((La/Yb), = 22.3 similar to 79. 0) and depletion in HFSE, and weak or no negative Eu anomalies (6Eu =1.76 similar to 3. 43). In general, their high Sr/Y(85 179) and (La/Yb) N values are attributed to their TTG affinities. Combined geochemical and zircon U-Pb age analysis, and field and petrographic observations suggest that the charnockitic rocks from Qian' an were originated from high -temperature melting of moderately hydrous basaltic source rocks at amphibolite facies. A mantle plume model is favored from the geochemical characteristics, which well explains the petrogenesis of charnockites, and many other geological features in the Eastern Block of the North China Craton as well.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2823
EP 2838
UT WOS:000385210900016
ER  

PT J
AU Li, PC
Guo, W
Guan, QB
Liu, JX
AF Li PengChuan
Guo Wei
Guan QingBin
Liu JieXun
TI Late Neoarchean crustal growth in the northeast of the North China Craton: Evidence from the geochronology and Hf isotope composition of Banshigou supracrustal rocks.
SO ACTA PETROLOGICA SINICA
AB This paper reports zircon U-Pb age, geochemistry and Hf isotopic data of Banshigou supracrustal rocks in order to discuss the tectonic setting and crustal evolution in the northeast of the North China Craton in the Late Neoarchean. The main rock types of Banshigou supracrustal rocks are include amphibolite, plagioclase gneiss, hornblende schist and magnetite quartzite. LA-ICP-MS zircon U-Pb dating shows the magmatic zircons in the amphibolite (BA-1) were crystallized at 2548 11 Ma while the magmatic zircons in the epidote-hornblende schist (BA-6) were crystallized at 2548 +/- 23 Ma, representing the formation age of supracrustal rocks. Besides, we found three captured zircons in BA-6 which age are between 2754 +/- 80Ma and 2710 +/- 92Ma, indicate Banshigou area may have occurred magmatic events during the Early Neoarchean. The protoliths of amphibolite and hornblende schist are basaltic rocks, trace element characteristics reveal that the protoliths formed in an island-arc setting. Hf isotopic data indicate that the zircons in amphibolite have positive em.(t) values between 0. 29 and 8. 89, one-stage model ages (t(DM1)) are between 2877Ma and 2544Ma, while most of the zircons in epidote-hornblende schist also have positive epsilon(Hf)(t) values between- 0.78 and 8. 03, theirs tm, are between 2871Ma and 2544Ma, implying that the magma provenance was mainly made up of materials from depleted mantle with contamination of recycled old crust. Some zircons which t are similar to theirs (207)pb/(206) Pb ages suggested Banshigou area occurred crustal growth during the late Neoarchean. Combine with the supracrustal rocks in other regions, we propose there was likely existed the Neoarchean Ji-Liao-Ji (Jilin Liaoning -Hebei) arc-continent collision orogenic belt in the North China Craton, besides, Banshigou area is one part of this orogenic belt.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2839
EP 2855
UT WOS:000385210900017
ER  

PT J
AU Wang, C
Liu, ZL
Song, J
Gao, X
Sun, LN
AF Wang Chao
Liu ZhiHong
Song Jian
Gao Xiang
Sun LiNan
TI Chronology, geochemical characteristics of granodiorite-quartz diorite pluton in Kaishantun, Yanbian area and its constrains to the beginning of Paleo-Pacific Plate subduction
SO ACTA PETROLOGICA SINICA
AB In recent years, the evolution history of Paleo-Pacific tectonic domain attracted the attention of many researchers. The zircon LA-ICP-MS U-Pb ages of granodiorite-quartz diorite pluton in Kaishantun, Yanbian area indicates that it formed in early Early Jurassic (198 1Ma). According to the ratio of Zr/Hf, we divided the samples into two groups: granodiorite with high Zr/Hf ratio and quartz diorite with low Zr/Hf ratio. Magma source of high Zr/Hf ratio group is from crust. Trace element compositions of this group are enrichment in large ionic lithophile elements (LILEs), such as Rb, Th, U, K, and depletion in high field strength elements (HFSEs), Nb, Ta, Ti. Magma source of low Zr/Hf ratio group is the mixed product of magma from crust and magma from depleted mantle. Samples of quartz diorite are strong negative with HFSEs (Nb, Ta, Zr, Hf, Ti), also have the typical geochemistry characteristics of arc -type magma. There are a lot of fine-grained dioritic enclaves in the rock mass. Under microscope, we can see needle like apatite on the thin section. The Kaishantu rock mass belong to calc-alkaline series. Combined with previous research, we found the north-east direction Early Jurassic active continental margin igneous belt. In the west of the belt, there is coeval back arc extensional zone in Xiao Hinggan Mountains-Zhangguangcailing area. The distribution of the two belts make a typical model of active continental margin arc and back arc extensional belt in a subduction zone, reveal the subduction of Paleo-Pacific plate to NE China in early Early Jurassic.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2856
EP 2866
UT WOS:000385210900018
ER  

PT J
AU Zhang, YY
Cai, LB
Jin, W
Liu, T
Zhang, PX
Li, J
AF Zhang YuanYuan
Cai LiBin
Jin Wei
Liu Ting
Zhang PeiXi
Li Jing
TI The petrogenesis and evolutionary process of Neoarchean Diaoyutai granite in western Liaoning Province Evidences from petrofabric
SO ACTA PETROLOGICA SINICA
AB There is a set of granitic complex exposed in the Diaoyutai area, western Liaoning Province, and it is an important part of "Suizhong granite". This set of granitic complex is composed mainly of porphyraceous granodiorite and quartz-bearing diorite, with a small amount of fine-grained biotite diorite (enclaves) and veinlike granite. The contacts of each kind of rock are clear, and we define it as "Diaoyutai granite" in the study. Zircon U-Pb ages show that the porphyraceous granodiorite, quartz-bearing diorite and veinlike granite are formed at 2538 +/- 20Ma, 2476 +/- 56Ma and 2470 18Ma respectively, which are all the products of the Late Neoarchean thermal event. Based on the macro-micro fabric analysis of the granitic complex, we confirm that the porphyraceous granodiorite has the massive structure and the typical accumulative texture that formed in the late stage of anataxis. The fine-grained biotite diorite is finegrained texture and it occurs in the porphyraceous granodiorite in the form of micro mafic enclaves. There developed plastic deformation, xenocrysts, quenching boundary and reverse veins in the enclaves showing the injection of mafic magma during the period of granodiorite melting, and subsequent to the period, the magma cooled rapidly. Dark quartz-bearing diorites intrude under the porphyraceous granodiorite, and the K-feldspar metacrysts increase obviously in the vicinity of the contact zone, showing the heating characteristic of " underplating" emplacement. Meanwhile, the veinlike granite cross cut both the porphyraceous granodiorite and quartz-bearing diorite, and have the characteristic of being highly enriched in melt. Deformation fabric is not well developed in all rocks. In short, the "Diaoyutai granite" recorded the Late Neoarchean crust anatexis and the interaction between crust and mantle. The petrofabric research shows that the Neoarchean crust reconstruction is a process of static, multiple and slow crust anatexis with the cotemporaneous injection of mantle-derived magma, resulting in magma mingling and mixing and subsequent large-scale magma underplating. According to the present study, we therefore conclude that the tectonic setting is a vertical underplating environment of mantle-derived magma, and is probably the magma arc environment far from subduction zones.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2867
EP 2880
UT WOS:000385210900019
ER  

PT J
AU Jia, WX
Jiang, QG
Wang, DY
Gao, W
AF Jia WeiXin
Jiang QiGang
Wang DongYan
Gao Wen
TI Captured zircon U-Pb ages in the mafic dike and constraints of the magmatic events in the basement of southern Songliao Basin
SO ACTA PETROLOGICA SINICA
AB Tuanshanzi mafic dikes were the last phase magmatic activities among the Mesozoic period in the southern margin of Songliao Basin, some of captured zircons were acquired from the mafic dikes. In order to reflect the magmatic activity events in the basement of Songliao Basin, LA-ICP-MS U-Pb dating of the captured zircons in the mafic dikes has been analyzed. The cathode luminescence (CL) images and the Tb/U ratios of the captured zircons express that the captured zircons have the features of magmatic origin. Eight groups of ages have been acquired from the results of the zircon dating, which reflected the record of magmatic events in Early Jurassic (176Ma) Hercynian period (291Ma), Caledonian (467Ma), Neoproterozoic (942Ma), Mesoproterozoic (1368Ma), Paleoproterozoic (1886Ma and 2165Ma) and Neoarchean (2458Ma). The basement had been experienced complex magmatic evolution and composition of the basement in southern Songliao Basin consisted mainly by Paleozoic and Early Mesozoic magmatic rocks as well as Xibao ' an Group (942Ma), which is considered that Precambrian crystalline basement existed in southern Songliao Basin. Zircons with the ages of Mesoproterozoic, Paleoproterozoic and Neoarchean had been rounded and metamorphic accretion rims. Those period zircons are probably the products that the zircons first formed in magmatic active events in North China Craton, then transported to southern Songliao Basin and captured in mafic dikes again, which reflected that the southern margin of Songliao Basin had been related to North China Craton, but it is uncertainty for whether those periods magmatic events existed in crystalline basement of Songliao Basin.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2881
EP 2888
UT WOS:000385210900020
ER  

PT J
AU Liu, JX
Guo, W
Zhu, K
AF Liu JieXun
Guo Wei
Zhu Kai
TI Geochronology, geochemistry and geological significance of the Early Cretaceous intrusive rocks from Xiuyan area, eastern Liaoning Province
SO ACTA PETROLOGICA SINICA
AB Petrography, geochemical data and LA-ICP-MS zircon U-Pb dating have been obtained for Maokuishan monzogranites, Huangdi granodiorites and Chaoyang norite gabbro in Xiuyan area, eastern Liaoning Province. The major elements of Maokuishan mozogranites are high in Si, Al and K, and low in Fe, Mg, Ca and Ti. Trace elements are enriched in incompatible elements such as K, Rb, Th, and depleted in Sr, P, Eu, and Ti, geochemical features indicate that granitoids are aluminum A-type granites (A/CNK =0.98 similar to 1. 03, A/NK = 1. 11 similar to 1. 12). Huangdi granodiorite, with the content of SiO2 are 64. 1%-70.8%, K20/Na20 is 0. 87 1. 08, and the aluminium index are A/CNK = 0.98-1. 02, A/NK =1.31 similar to 1. 55, are enriched in LILEs, such as K, Rb, Sr and Ba, depleted in HFSEs as Nb, P and Ti, and high field strength elements, (La/Yb)(N) = 13. 41-68. 2, belong to metaluminousperaluminous I-type granitoids. Chaoyang norite gabbro with thecontent of SiO2 are 54. 8% 58. 3%, K2O/Na2O is 0. 57 similar to 0. 78, are enriched in LILEs, as K, Ba, Sr, and LREEs as La, Ce, Pr, Nd, depleted in HFSEs, as Nb, U, P, Ti. LA-ICP-MS zircon U-Pb age data of Maokuishan monzogranite, Huangdi granodiorite and Chaoyang norite gabbro are (137)Ma, (139)Ma and 139Ma, respectively, indicate that intrusive rocks were formed in Early Cretaceous. Combined with structure background graphic, Maokuishan monzogranites, Huangdi granodiorites and Chaoyang norite gabbro are all the products of magmatism in the extensional tectonic setting. Combined with spatial and temporal characteristics of the three plutons show in the Early Cretaceous period, Xiuyan area of eastern Liaoning Province in a non-orogenic extension environment, and the development of lithospheric thinning and stretching activities are characteristic from deep to shallow, is the eastern North China Plate stretch geodynamic setting concrete manifestation.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2889
EP 2900
UT WOS:000385210900021
ER  

PT J
AU Wu, XW
Xu, ZY
AF Wu XinWei
Xu ZhongYuan
TI Sertengshan Group in Yingpanwan-Dongwufenzi aera, Inner Mongolia: Revision and its geological significance
SO ACTA PETROLOGICA SINICA
AB Sertengshan Group is an important component of Early Precambrian metamorphic basement in Yinshan Block, which is in the western landmass in the North China Craton. It is significant to study the tectonic evolution of the Early Precambrian North China Craton. According to the geological mapping, profiles, geochemical analysis and SHRIMP dating, this article discussed on the composition, primary rock formation, formation environment and the age of the Sertengshan Group. The author believes that the Sertengshan Group is composed of Chensangou Formation, Liushugou Formation and Dongwufenzi Formation. The Chensangou Formation consists of dark gray fine-grained amphibolite and light gray fine-grained biotite plagiogneiss intercalated with hornblende plagiogneiss. The lower member of the Dongwufenzi Formation consists of fine-grained quartz -bearing biotite plagioclase amphibolite, biotite hornblende plagiogneiss and biotite plagiogneiss, which appear in rhythm. On top is gray fine-grained biotite plagiogneiss gripping thin bedded magnetite biotite plagiogneiss. Fine-grained biotite amphibole schist interbedded with light -flesh -colored biotite felsic gneiss belong to the upper member of Dongwufenzi Formation, there is thin bedded tremolite marble on the top. Liushugou Formation is characterized by hornblende schist, two -mica schist, two mica quartz schist, garnet biotite schist and biotite schist. The original rock has two general features: the lower part is dominated by volcanic rock; the upper part is based on elastic sedimentary rocks and chemical sedimentary rock. Volcanic rock is rich in alkali obviously, and medium acidic volcanic is characterized by relative enrichment in Al and large ion lithophile elements (LILE) and light rare earth elements (LREE). It is low in Mg, Y and heavy rare earth elements (HREE). Its geochemical characteristics are similar to adakite, which is formed in tectonic environment of active continental margin. We sampled separately in felsic gneiss and biotite schist, which are interbedded in the upper part of Dongwufenzi Formation. According to the SHRIMP U-Pb isotopic dating, we got the diagenetic age (1980 9Ma, 1946 16Ma) and the metamorphic age (1901+/-15 Ma, 1893 +/- 66Ma). In conclusion, Sertengshan Group deposited between 1. 95 1. 98Ga in the island -arc environment of an active continental margin, and brought about metamorphism with an orogenic movement in 1. 9Ga.
SN 1000-0569
EI 2095-8927
PD SEP
PY 2016
VL 32
IS 9
BP 2901
EP 2911
UT WOS:000385210900022
ER  

EF  

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印刷版(Print): ISSN 1000-0569 网络版(Online): ISSN 2095-8927
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