| 西藏谢通门地区中侏罗世花岗岩的地球化学特征及时代依据 |
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| 引用本文： | 王贝,李鹏,刘智贤,程龙,闫磊,王卫军.西藏谢通门地区中侏罗世花岗岩的地球化学特征及时代依据[J].地质通报,2016,35(9):1479-1487. |
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| 作者姓名： | 王贝 李鹏 刘智贤 程龙 闫磊 王卫军 |
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| 作者单位： | 1. 陕西区域地质矿产研究院, 陕西 咸阳 712000;2. 河南省地矿局第一地质矿产调查院, 河南 郑州 471023 |
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| 基金项目： | 中国地质调查局项目（编号：1212011121225） |
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| 摘 要： | 西藏谢通门县一带区域上属于冈底斯花岗岩带南亚带,侵入岩极其发育,目前填绘有白垩纪、古近纪和新近纪岩体。通过同位素年代学研究,获得12个锆石的U-Pb同位素年龄数据,在原划归白垩纪、古近纪和新近纪岩体中解体出侏罗纪侵入体,按其岩石类型特征,归并为早侏罗世东热村序列和中侏罗世东嘎乡序列。其中,在约拉嘎莫岩体中获得锆石U-Pb同位素年龄166.9±2.8Ma,时代为中侏罗世巴柔期。
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| 关 键 词： | 冈底斯带 谢通门县 中侏罗世 花岗岩 同位素年龄 |
| 收稿时间： | 4/7/2016 12:00:00 AM |
| 修稿时间： | 2016/6/20 0:00:00 |
Geochemical characteristics and age evidence of Middle Jurassic granite in Xietongmen area, Tibet |
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| WANG Bei,LI Peng,LIU Zhixian,CHENG Long,YAN Lei and WANG WeiJun.Geochemical characteristics and age evidence of Middle Jurassic granite in Xietongmen area, Tibet[J].Geologcal Bulletin OF China,2016,35(9):1479-1487. |
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| Authors: | WANG Bei LI Peng LIU Zhixian CHENG Long YAN Lei and WANG WeiJun |
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| Institution: | 1. Academy of Regional Geological Survey and Mineral Resources Exploration of Shaanxi, Xianyang 712000, Shaanxi, China;2. No. 1 Institute of Geological and Mineral Resources Survey, Henan Bureau of Geology and Mineral Resources, Zhengzhou 471023, He''nan, China |
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| Abstract: | Xaitongmoin County belongs regionally to southern subbelt of Gandise granite belt and possesses extremely developed intrusive rocks. In geological map, there are Cretaceous, Paleogene and Neogene rock masses. Through isotopic chronologic study, the authors obtained 12 zircon U-Pb age data and, on such a basis, separated a Jurassic intrusive body from the previously-assigned Cretaceous, Paleogene and Neogene rock masses. According to its rock type, this Jurassic intrusive body is incorporated into the Early Jurassic Dorecun series and Middle Jurassic Donggaxiang series. Zircon U-Pb isotopic age of Yuelagamo rock body within the Jurassic intrusive body is 166.9±2.8Ma, suggesting Middle Jurassic Barou period. |
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| Keywords: | Gangdise belt Xietongmen County Middle Jurassic granite isotopic age |
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