新疆东天山黄山东岩体橄榄石成因意义探讨

邓宇峰, 宋谢炎, 周涛发, 袁峰, 陈列锰, 郑文勤. 2012. 新疆东天山黄山东岩体橄榄石成因意义探讨. 岩石学报, 28(7): 2224-2234.
引用本文: 邓宇峰, 宋谢炎, 周涛发, 袁峰, 陈列锰, 郑文勤. 2012. 新疆东天山黄山东岩体橄榄石成因意义探讨. 岩石学报, 28(7): 2224-2234.
DENG YuFeng, SONG XieYan, ZHOU TaoFa, YUAN Feng, CHEN LieMeng, ZHENG WenQin. 2012. Correlations between Fo number and Ni content of olivine of the Huangshandong intrusion, eastern Tianshan, Xinjiang, and the genetic significances. Acta Petrologica Sinica, 28(7): 2224-2234.
Citation: DENG YuFeng, SONG XieYan, ZHOU TaoFa, YUAN Feng, CHEN LieMeng, ZHENG WenQin. 2012. Correlations between Fo number and Ni content of olivine of the Huangshandong intrusion, eastern Tianshan, Xinjiang, and the genetic significances. Acta Petrologica Sinica, 28(7): 2224-2234.

新疆东天山黄山东岩体橄榄石成因意义探讨

  • 基金项目:

    本文受国家自然科学基金(40973038、41172090、41040025)、"十二五"国家科技支撑计划项目(2011BAB06B01)、新世纪优秀人才支持计划项目(NCET-10-0324)、矿床地球化学国家重点实验室开放基金(201102)和合肥工业大学校博士学位专项资助基金(2011HGBZ1286)联合资助

详细信息
    作者简介:

    邓宇峰,男,1983年生,讲师,矿床地球化学专业,E-mail: dyfeng_214@sina.com

    通讯作者: 宋谢炎,男,1962年生,研究员,从事岩石与矿床地球化学研究,E-mail:songxieyan@vip.gyig.ac.cn
  • 中图分类号: P578.942

Correlations between Fo number and Ni content of olivine of the Huangshandong intrusion, eastern Tianshan, Xinjiang, and the genetic significances

More Information
  • 黄山东岩体位于新疆东天山造山带中段,由四次岩浆侵入形成:第一次侵入形成了岩体上部的橄榄辉长岩、角闪辉长岩和闪长岩,构成岩体的主体;第二次侵入形成辉长苏长岩,呈岩墙状分布于岩体西端和西北部;第三次侵入岩石为斜长二辉橄榄岩,位于岩体下部,为主要的赋矿岩石;第四次侵入岩石为底部角闪辉长岩。橄榄石为第三次侵入的斜长二辉橄榄岩和第一次侵入的橄榄辉长岩主要造岩矿物之一,橄榄石的镁橄榄石牌号 (Fo) 值介于68.5~82.5之间。其中含硫化物斜长二辉橄榄岩中的橄榄石具有较高的Fo值 (79.7~82.5);斜长二辉橄榄岩中橄榄石的Fo值为78.3~79.9;而基性程度较低的橄榄辉长岩中橄榄石具有较低的Fo值 (68.5~72.2)。利用橄榄石矿物成分计算得出黄山东岩体母岩浆Mg#(Mg2+/(Mg2++Fe2+)) 为0.59,为原生玄武质岩浆经历结晶分异作用形成。模拟计算结果显示黄山东岩体不含矿岩石中橄榄石是母岩浆经过2%的橄榄石结晶分异且硫达到饱和后,在硫化物熔离的同时岩浆发生橄榄石结晶而形成,并且橄榄石︰硫化物≈50︰1,部分橄榄石成分投点在橄榄石结晶和硫化物熔离的模拟曲线右下侧,指示它们可能受到晶间硅酸盐熔浆作用的影响。含硫化物斜长二辉橄榄岩中Fo值与Ni含量呈负相关关系,说明橄榄石与硫化物熔体之间发生了Fe-Ni交换反应。

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  • 图 1 

    新疆北部主要构造单元 (a)、东天山地区地质简图 (b) 和黄山-镜儿泉铜镍硫化物成矿带地质简图 (c)(据新疆地质矿产局,1993Xiao et al., 2004)

    Figure 1. 

    Tectonic units of northern Xinjiang (a), simplified geological map of eastern Tianshan (b) and simplified geological map of Huangshan-Jingerquan copper-nickel mineralization belt (c)(after BGMRX, 1993; Xiao et al., 2004)

    图 2 

    黄山东岩体地质简图及剖面图 (据李德惠等,1989)

    Figure 2. 

    Simplified geological map and a cross section of the Huangshandong intrusion

    图 3 

    黄山东岩体岩石学特征

    Figure 3. 

    Texture photos of the rocks from Huangshandong intrusion

    图 4 

    黄山东岩体ZK10-2钻孔样品中橄榄石成分随深度变化图

    Figure 4. 

    Stratigraphic variations of olivine composition in drill hole ZK10-2 of the Huangshandong intrusion

    图 5 

    黄山东岩体橄榄石成分进行模拟计算

    Figure 5. 

    Model calculation of Fo in olivine from the Huangshandong intrusion

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出版历程
收稿日期:  2011-11-08
修回日期:  2012-03-14
刊出日期:  2012-07-01

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