| 西昆仑加里东期花岗岩带的地质特征 |
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| 引用本文： | 王元龙,李向东.西昆仑加里东期花岗岩带的地质特征[J].矿物学报,1995,15(4):457-461. |
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| 作者姓名： | 王元龙 李向东 |
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| 作者单位： | 中国科学院地球化学研究所!贵阳，550002，中国科学院地球化学研究所!贵阳，550002，新疆地质矿产局地质科学研究所!乌鲁木齐，830000，中国科学院地球化学研究所!贵阳，550002 |
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| 基金项目： | 博士后基金，中国科学院矿床地球化学开放研究实验室基金 |
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| 摘 要： | 西昆仑地区加里东期花岗岩极为发育，主要沿库地北构造带南侧成带分布，岩体数量多、规模大，不同测试方法获同位素年龄主要为４００￣４８０Ｍａ；岩石组合类型大致可分为石英闪长岩－花岗闪长岩－二长花岗岩组合－钾长花岗岩－二长花岗岩组合和石英闪长岩－花岗闪长岩－斜长花岗岩组合；岩石化学表明该区花岗岩主要为钙碱性系列；构造环境判别岩石为同造山和造山期前岩浆活动产物。结合区域地质资料及与之相伴生蛇绿岩带的地质特征
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| 关 键 词： | 加里东期 花岗岩带 地质特征 西昆仑地区 |
GEOLOGICA FEATURES OF THE CALEDONIAN GRANITE ZONE IN THE WEST KUNLUN AREA |
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| Wang Yuan Long ,Wang Zhong Gang, Huang Zhilong.GEOLOGICA FEATURES OF THE CALEDONIAN GRANITE ZONE IN THE WEST KUNLUN AREA[J].Acta Mineralogica Sinica,1995,15(4):457-461. |
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| Authors: | Wang Yuan Long Wang Zhong Gang Huang Zhilong |
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| Abstract: | The Caledonian granite zone in the West Kunlun area, Xinjiang, is distributed along the south-ern side of the North Kudi tectonic belt. The isotopic ages of granites determined by different methods are within the range of 400-480Ma. Rock assemblages in the granite zone can be divided into three groups including quartz diorite-granodiorite-adamellite, moyite-adamellite and quartz diorite-granodiorite-plagiograni Petrochemical features showed that the granites belong to the calc-alkaline series. As viewed from the tectonic settings, it is indicated that the granite zone was the product of syn-orogeny or post -orogen. In combination of the regional geology data 4nd the ge-ological characteristics of the ophiolite zone associated with the granite zone in West Kunlun, this paper suggested that the subduction of the ocean crust in West Kunlun proceeded in the direction from north to south and the North Kudi tectonic belt may be the position of the "4th suture zone"in the Qinghai-Xizang Plateau. |
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| Keywords: | Caledonian granite zone geological feature West Kunlun area Xinjiang |
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