| 新疆阿舍勒铜矿容矿围岩蚀变的低钠晕及其意义 |
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| 引用本文： | 王登红.新疆阿舍勒铜矿容矿围岩蚀变的低钠晕及其意义[J].矿物岩石,1995,15(1):18-25. |
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| 作者姓名： | 王登红 |
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| 作者单位： | 中国地质科学院研究生部!北京100083 |
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| 摘 要： | 新疆阿舍勒铜矿的容矿围岩是一个套双峰式海相火山岩组合，围岩蚀变由多期次叠加和变质作用的影响而变得极为复杂，以细碧质碉石的青盘岩化、石英角斑质火山碎屑岩的黄铁绢英财化为主要特点，更有意义的是：原岩属钠质火山岩系，但容矿围岩无论是酸性次火山岩还是基性火山岩，蚀后都具有低钠的共同特点，这对于同类矿床具有找矿意义，低钠晕是海底火山喷气过程中高温气液交代而成，可作为海底火山喷发矿床的一个成因和找矿标志。
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| 关 键 词： | 铜矿床 容矿 围岩蚀变 低钠晕 成矿 |
THE SODIUM DEPLETION AND ITS SIGNIFICANCE OF THE HOST VOLCANIC ROCKS IN ASHELE COPPER MINE,XINJIANG |
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| Wang Denghong.THE SODIUM DEPLETION AND ITS SIGNIFICANCE OF THE HOST VOLCANIC ROCKS IN ASHELE COPPER MINE,XINJIANG[J].Journal of Mineralogy and Petrology,1995,15(1):18-25. |
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| Authors: | Wang Denghong |
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| Abstract: | The volcanic rocks hosting the Ashele copper deposits are bimodal ones. Spilites beneath the No. 1 ore deposit are altered mainly by chlorite,carbonate and minor quartz and sericite. They are characterized by low K2O and Na2O, but high MgO and volatiles such as H2O+ and CO2. Quartz-keratophyric tuffs host the No. 2 barite-polymetallic deposit. They are altered by pyrite, sericite and quartz, with a chlorite-carbonate-rich core just below the stratiform orebodies and characterized by low Na2O content,relatively high volatile and high K2O chemically. So,both No. 1 and No. 2 ore deposits have a -common feature of sodium depletion in footwall or/ and hostrocks. This feature can be used as a useful pathfinder to volcanic-hosted massive sulfide deposits. |
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| Keywords: | Xin Jiang Ashele copper deposit bimodal volcanic rocks alteration sodium depletion |
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