新疆香山铜镍钛铁矿区两个镁铁-超镁铁岩系列及特征

王玉往, 王京彬, 王莉娟, 龙灵利. 新疆香山铜镍钛铁矿区两个镁铁-超镁铁岩系列及特征[J]. 岩石学报, 2009, 25(4): 888-900.
引用本文: 王玉往, 王京彬, 王莉娟, 龙灵利. 新疆香山铜镍钛铁矿区两个镁铁-超镁铁岩系列及特征[J]. 岩石学报, 2009, 25(4): 888-900.
WANG YuWang, WANG JingBin, WANG LiJuan, LONG LingLi. Characteristics of two mafic-ultramafic rock series in the Xiangshan Cu-Ni-(V) Ti-Fe ore district, Xinjiang[J]. Acta Petrologica Sinica, 2009, 25(4): 888-900.
Citation: WANG YuWang, WANG JingBin, WANG LiJuan, LONG LingLi. Characteristics of two mafic-ultramafic rock series in the Xiangshan Cu-Ni-(V) Ti-Fe ore district, Xinjiang[J]. Acta Petrologica Sinica, 2009, 25(4): 888-900.

新疆香山铜镍钛铁矿区两个镁铁-超镁铁岩系列及特征

  • 基金项目:

    国家重点基础研究项目(2007CB411304和2001CB409806)

Characteristics of two mafic-ultramafic rock series in the Xiangshan Cu-Ni-(V) Ti-Fe ore district, Xinjiang

  • 新疆东天山香山地区镁铁-超镁铁杂岩体中产有香山中中型铜镍矿床和香山西大型铜镍-钛铁矿床。通过对这套镁铁-超镁铁岩进行系统的野外研究和采样,对各类岩石进行详细的岩石学和岩石地球化学研究,识别出该区两个具有不同成矿专属性的岩石系列。(1)早期与钒钛磁铁矿矿化有关的岩石系列(简称“钛铁系列”),岩石组合为细晶辉长岩-钛铁辉长岩(钛铁矿石)-含钛(角闪)辉长岩-淡色辉长岩。从钛铁矿石-含钛辉长岩-淡色辉长岩连续演化,矿物组成和岩石结构逐渐过渡,岩石相对偏酸性,化学成分以富碱、富铁、高钛、硅、铝、钙,钙碱指数(calk/m)高而镁铁指数(m/f)低为特征,稀土和微量元素方面斜长石堆积作用和分离结晶作用特征明显;(2)晚期与铜镍硫化物矿化有关的岩石系列(简称“铜镍系列”),岩石组合为超镁铁岩-韵律状橄榄辉长岩-蚀变角闪辉长岩,与前一系列呈侵入关系。该系列岩石组合偏基性,化学成分上明显富镁,贫铁、钛,具相对较低的硅、铝和钾、钠含量,稀土和微量元素配分曲线平缓,与原始地幔/亏损地幔特征相近。此外,本区发育的浅成-超浅成脉岩(辉绿岩类)多为辉长岩类的晚期补充岩相,其岩石化学特征位于两个演化系列的末端,可能是两个演化系列残余岩浆混合-再侵位的产物。
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出版历程
收稿日期:  2008-09-28
修回日期:  2008-12-07
刊出日期:  2009-04-30

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