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投稿时间:2019-07-09 修订日期:2019-08-26
投稿时间:2019-07-09 修订日期:2019-08-26
中文摘要: 大通沟岩体侵位于秦祁昆中央造山系的阿尔金构造带(Ⅱ)和柴达木-西秦岭微地块,柴达木地块与阿尔金构造带交界处,岩体侵入主要有闪长岩、花岗闪长岩及少量二长花岗岩。本文分析了分布较广的闪长岩中锆石LA-ICP-MS U-Pb年龄为367.5±5.2Ma,锆石中Th/U比值在0.28-0.94之间,平均0.58,显示了岩浆锆石特征;据岩体中锆石U-Pb年龄,结合区内构造演化,认为岩体侵位与海西期印度板块和欧亚板块俯冲-碰撞的构造作用诱发的阿尔金走滑断裂活动有关。
Abstract:Da-Tonggou copper molybdenum beds in qinling-qilian-kulun central mountains of the altun tectonic belt (Ⅱ) and qaidam - west qinling Micro plot, At the junction of qaidam block and Altn tectonic belt,Rock intrusion mainly includes diorite, granodiorite and a small amount of monzonite.This paper analyzed the U-Pb age of zircon in diorite with wide distribution.Cathode luminescence (CL) has a good rhythmic band.Zircon Th/U ratio is between 0.28 and 0.94,An average of 0.58,It shows the characteristics of magmatic zircons;LA-ICP-MS U-Pb age of diorite body was 367.5 ± 5.2Ma.According to the U-Pb age of zircon in the rock mass.According to the U-Pb age of zircon in the rock mass,Combined with structural evolution in the region,We believe that the magmatic activity is related to the tectonic subduction and collision of the plates in the hercynian epoch.
keywords: theSnorthernSmarginSofStheSTibetanSPlateau Altn sher zone Da-Tonggou diorite Zircon U-Pb age
文章编号:20190709001 中图分类号: 文献标志码:
基金项目:青海省茫崖镇大通沟南山地区矿产远景调查项目(项目编号:1212011140094)资助。
作者 | 单位 | 邮编 |
刘军* | 西安西北有色物化探总队有限公司 | 710068 |
刘敏 | 西安西北有色物化探总队有限公司 | 710068 |
杨春雷 | 咸阳西北有色总队有限公司 | 712000 |
黄波 | 贵州省有色金属和核工业地质勘查局物化探总队 | 558000 |
徐伟钧 | 浙江省水文地质工程地质大队 | 315012 |
袁海潮 | 西安西北有色物化探总队有限公司 | 710068 |
郭文波 | 西安西北有色物化探总队有限公司 | 710068 |
曹其琛 | 中国冶金地质总局山东正元地质勘查院 | 250101 |
Author Name | Affiliation | Postcode |
LIU JUN | Xi`an Northwest Noferrous geophysical-geochemical Corps Ltd, | 710068 |
710068 | ||
712000 | ||
558000 | ||
315012 | ||
710068 | ||
710068 | ||
250101 |
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