| 西昆仑山北部早古生代构造－岩浆带的发现 |
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| 引用本文： | 许荣华,张玉泉,谢应雯,陈福坤,张巧大,赵敦敏.西昆仑山北部早古生代构造－岩浆带的发现[J].地质科学,1994(4). |
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| 作者姓名： | 许荣华 张玉泉 谢应雯 陈福坤 张巧大 赵敦敏 |
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| 作者单位： | 中国科学院地质研究所，中国科学院广州地质新技术研究所，中国科学院地质研究所，中国地质科学院地质研究所 |
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| 基金项目： | 国家自然科学基金,中国科学院重点资助,法国科研中心合作研究项目 |
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| 摘 要： | １９８７年以来，先后做了４条横穿昆仑山的综合路线地质调查。它们是：中－巴公路沿线；新－藏公路沿线；于田县普鲁村－苏巴什－硫磺达坂路线；青海茫崖镇－祁曼塔格路线。在西昆仑山北部的调查区内，都有钙－碱性的深成岩体出露。通过对这些岩体系统地做Ｕ－Ｐｂ、Ａｒ－Ａｒ及Ｒｂ－Ｓｒ定年研究，发现它们具有早古生代年龄（３８４—４８０Ｍａ），延伸上千公里，形成于活动大陆边缘或碰撞后的构造环境，常与属于蛇绿岩套的组分相伴生。这充分说明在青藏高原内部存在一条新发现的缝合带。
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| 关 键 词： | 昆仑山，花岗岩类，古生代，地质年代学，构造－岩浆带缝合带 |
A DISCOVERY OF AN EARLY PALEOZOIC TECTONOMAGMATIC BELT IN THE NORTHERN PART OF WEST KUNLUN MOUNTAINS |
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| Xu Ronghua.A DISCOVERY OF AN EARLY PALEOZOIC TECTONOMAGMATIC BELT IN THE NORTHERN PART OF WEST KUNLUN MOUNTAINS[J].Chinese Journal of Geology,1994(4). |
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| Authors: | Xu Ronghua |
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| Abstract: | Since 1987, totally four integrated geological investigation profiles across the West Kunlun Mountains were performed. They are: (1)Profile along the Sino-Pakistan highway (from Kashigar to Kunjirap Pass); (2)Profile along the XinjiangXizang highway .(from Yecheng to Shiquanhe); (3) Pulu Village, Yutian CountySubaxi-Liuhuang Pass profile, and(4) Mangnai Town, Qinghai-Qimantaga-Muzhtaga peak profile. In the investigation region, in the northern part of the West Kunlun Mountains calc-alkaline plutonic rocks are exposed. Systematical geochronological studies of the plutonic rocks have been done, in the paper 5 U-Pb dating on the zircons,3 Ar-Ar dating on the honblende and biotites and 5 Rb-Sr dating on the wholerocks and minerals from the plutons are reported. These results enabled us to find an early Paleozoic (384-480Ma) tectono-magmatic belt, extending for a thousandof kilometers. It was formed on an active continental margin or in a postcollisional tectonis envionment, and is accompanied with a complex belonging to ophiolite suit in Kudi, Subaxi and Oy ag area. It is a newly found and defined suture zonein the interior of the Qinghai-Xizang Plateau. |
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| Keywords: | Kunlun Mountains Paleozoicera Geochronology Granitoid Tectono-magmatic belt Suture zone |
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