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新疆和田西昆仑镁质矽卡岩(含和田玉)矿物分带、成因及时代
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摘要
<正>花岗闪长岩、石英闪长岩或闪长岩等侵入镁质大理岩在接触部位发生以接触交代变质作用为主要特征的镁质矽卡岩成矿作用。在区域构造多期次的活动背景下,成矿流体多期次活动,晚期形成的细颗粒透闪石多期次交代已经形成的粗颗粒的透闪石并形成由细粒透闪石组成的软玉。镁质矽卡岩的形成机制是揭示矽卡岩形成过程中元素的迁移性质的重要线索。其中部分镁质矽卡岩含有的软玉是一种单矿物集合体,主要由透闪石;
引文
[1]LiuY,Deng J,Shi G H,et al,2010,Chemical Zone of Nephrite in阿拉玛斯,Xinjiang,China[J],Resour Geol,60:249-259
    [2]Liu Y,Deng J,Shi G H,et al,2011a,Geochemistry and petrology of nephrite from Ala-mas,Xinjiang,NW China[J],Asian Earth Sciences 42:440-451.
    [3]Liu Y,D J,Shi G H,et al,2011b,Geochemistry and petrogenesis of placer nephrite fro-mHetian,Xinjiang[J],Ore Geology Reviews,41:122-132.
    [4]Liu Y,Zhang RQ,Abuduwayiti M,etal,2016,SHRIMP U-Pb zircon ages,mineral co-mpositions and geochemistry of placer nephrite in the Yurungkash and Karakash Riv-er deposits,West Kunlun,Xinjiang,northwest China:Implication for a Magnesium Sk-arn[J],Ore Geology Reviews,72:699-727.
    [5]LiuY,Zhang RQ,Zhang ZY,etal,2015a,Mineral inclusions and SHRIMP U-Pb dat-ing of zircons from the Alamas nephrite and granodiorite:Implications for th-e genesis of amagnesian skarn deposit[J],Lithos,212-215,128-144.
    [6]Zhang,Q.C.,Liu,Y.,Huang,H.,Wu,Z.H.,Zhou,Q.,2016.Petrogenesis and tectonic implications of the high-K Alamascalc-alkaline granitoids at the northwestern margin of the Tibetan Plateau:Geochemical and Sr-Nd-Hf-0 isotope constraints.Journal of Asian Earth Sciences,127,137-151.
    [7]蒋壬华,1986.和田玉成因类型、成矿模式及分布规律的初步探讨[J]新疆地质,4(4):1-12.

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