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西昆仑麻扎-康西瓦一带温泉沟群的形成时代及物源区分析
引用本文:李博秦,姚建新,高联达,边小卫,尹宗义,崔建堂,陈文西.西昆仑麻扎-康西瓦一带温泉沟群的形成时代及物源区分析[J].地质通报,2007,26(4):457-465.
作者姓名:李博秦  姚建新  高联达  边小卫  尹宗义  崔建堂  陈文西
作者单位:1. 中国地质科学院地质研究所,北京,100037
2. 陕西省地质调查院,陕西,咸阳,712000
3. 中国地质调查局成都地质矿产研究所,四川,成都,610082
基金项目:中国地质调查局1:25万麻扎幅区域地质调查项目(编号:200213000005)、1:25万岔路口幅区域地质调查项目(编号:200313000003)和国家自然科学基金西昆仑地区古生代混杂堆积碎屑岩地层的再研究项目(编号:40572018)资助.致谢:本文引用了陕西地调院1:25万麻扎幅、岔路口幅区域地质调查报告等资料,项目组的同志和陕西省地矿局第一地质大队孙键工程师付出了艰辛的劳动,岩石样品分析由国家地质实验中心完成,文中部分插图由陕西区研院刘春花完成,在此一并表示感谢.
摘    要:温泉沟群出露在西昆仑麻扎-康西瓦构造接合带的南侧,岩性主要为浅变质的碎屑岩,对这套碎屑岩的形成时代和产出构造背景目前还存在着争议。采于这套地层中的大量微体古生物化石表明,其形成时代为早志留世。物质组成、岩石碎屑特征、岩石地球化学特征等的分析结果显示,其物源区主要为活动大陆边缘、过渡陆壳和造山再旋回物源区,形成时的构造环境为深海相残留洋盆。这些分析结果为康西瓦结合带的研究提供了地层学方面的依据。

关 键 词:西昆仑麻扎-康西瓦一带  温泉沟群的时代  物源区分析
文章编号:1671-2552(2007)04-0457-09
收稿时间:2006-06-25
修稿时间:2007-01-15

Age and source regions of the Wenquangou Group in the Mazar-Kangxiwar area, West Kunlun Mountains
LI Bo-qin,YAO Jian-xin,GAO Lian-d,BIAN Xiao-wei,YIN Zong-yi,CUI Jian-tang,CHEN Wen-xi.Age and source regions of the Wenquangou Group in the Mazar-Kangxiwar area, West Kunlun Mountains[J].Geologcal Bulletin OF China,2007,26(4):457-465.
Authors:LI Bo-qin  YAO Jian-xin  GAO Lian-d  BIAN Xiao-wei  YIN Zong-yi  CUI Jian-tang  CHEN Wen-xi
Institution:1. Institute of Geology, Chinese Academy of Geological Sciences, Bering 100037, China; 2. Shaanxi Institute of Geological Survey, Xianyang 712000, Shaanxi, China; 3. Chengdu Institute of Geology and Mineral Resources, China Geological Survey, Chengdu 610082, Sichuan, China
Abstract:The Wenquangou Group is exposed in the Mazar-Kangxiwar junction zone, West Kunlun Mountain. It is made up of low-grade metamorphic clastic rocks. There are different views about the age and tectonic setting of this suite of metamorphic clastic rocks. Plenty of microfossils collected from this sequence of rocks indicate a Early Silurian age. Analysis of the material composition, characteristics of rock clasts and rock geochemistry of this sequence of rocks indicate that its source regions of the simple metamorphic clastic rocks are mainly active continental margins, transitional continental crust and orogenic recycling source regions. The tectonic environment of the Wenquangou Group is an abyssal relict ocean basin. These analytical results furnish stratigraphic evidences for the study of the Kangxiwar-Mazar junction zone.
Keywords:Mazar-Kangxiwar area  West Kunlun  age of the Wenquangou Group  analysis of source regions
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