| 新疆拜城波孜果尔东矿区侵入岩矿物学特征 |
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| 引用本文： | 尹京武,闫星光,朴庭贤,侯凤娇,陈浦浦,聂 潇,徐海明,王 军.新疆拜城波孜果尔东矿区侵入岩矿物学特征[J].地球科学,2014,39(3):251-260. |
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| 作者姓名： | 尹京武 闫星光 朴庭贤 侯凤娇 陈浦浦 聂 潇 徐海明 王 军 |
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| 作者单位： | 1.中国地质大学科学研究院, 北京 100083 |
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| 基金项目： | 中国地质科学院矿产资源研究所委托项目(No.3-4-2011-166-A) |
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| 摘 要： | 新疆拜城县波孜果尔东矿区侵入岩为富含铌、钽、铀、钍、稀土、锆、铷、铯、锂等有用元素的含矿岩体.通过偏光显微镜、电子探针(EPMA)分析, 对拜城波孜果尔东矿区侵入岩的矿物学特征进行了详细的研究, 并对岩浆形成的构造背景进行了初步探讨, 这对成岩、成矿作用研究有一定参考意义.研究结果表明, 波孜果尔东矿区侵入岩为黑云母碱性花岗岩, 主要造岩矿物包括石英、钠长石、钾长石、钠铁闪石、锂云母和黑云母等.其中, 黑云母为锂铁叶云母, 以富Si富Fe、低Al贫Mg为特征; 锂云母以富Si、高Li低Al为特征, 它们为黑云母-锂铁云母系列的不同成员, 均属三八面体型.钠铁闪石以富含Fe2+为特征.副矿物包括烧绿石、星叶石、氟铈矿、独居石、钍石、萤石、锆石、铌铁矿等.岩石形成于非造山的板内构造环境, 且具高温、无水、低氧逸度的成岩特点.
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| 关 键 词： | 侵入岩 波孜果尔 东矿区 矿物学 电子探针 显微镜 |
| 收稿时间： | 2013-06-11 |
Mineralogical Characteristics of Intrusive Rocks in Boziguoer East Mining Area,Baicheng County,Xinjiang |
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| Abstract: | The Boziguoer intrusive rocks in Baicheng County of Xinjiang are ore-bearing rocks with abundant useful elements such as Nb, Ta, U, Th, rare earth, Zr, Rb, Cs and Li etc.. A polarized light microscope and electron probe micro analysis (EPMA) is involved in detailed investigations into the mineralogical characteristics of intrusive rocks in this study. The results show that the main rock forming minerals include quartz, albite, potash feldspar, arfvedsonite characterized by rich Fe2+, Li-siderophyllite characterized by rich Si, Fe, low Al and poor Mg, and lepidolite characterized by rich Si, Li, low Al. Li-siderophyllite and lepidolite are minerals of trioctahedral mica group, belonging to the biotite-lepidolite series as different members. Moreover, the accessory minerals include pyrochlore, astrophyllite, fluocerite, monazite, thorite, fluorite, zircon, niobite etc. Then, the intrusive rocks are named as biotite alkaline granite. It is inferred that the magma might have been formed in an anorogenic intraplate tectonic setting in which diagenesis generally shows such characteristics as high-temperature, anhydrous nature and low oxygen fugacity. |
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