新疆伊犁地块南缘志留纪和泥盆纪花岗质侵入体锆石SHRIMP定年及其形成时构造背景的初步探讨

朱志新,王克卓,郑玉洁,孙桂华,张超,李亚萍

新疆伊犁地块南缘志留纪和泥盆纪花岗质侵入体锆石SHRIMP定年及其形成时构造背景的初步探讨

朱志新,王克卓,郑玉洁,孙桂华,张超,李亚萍

- 中国地质科学院地质研究所，新疆地矿局第一区域地质调查大队，新疆地矿局第一区域地质调查大队，中国地质科学院地质研究所，新疆地矿局第一区域地质调查大队，中国地质科学院地质研究所北京 100037 新疆地矿局第一区域地质调查大队，乌鲁木齐 830011，乌鲁木齐 830011，乌鲁木齐 830011，北京 100037，乌鲁木齐 830011，北京 100037
基金项目:
本文受国家重要基础研究发展规划项目“中国西部中亚型造山与成矿”综合研究课题“中亚型造山与成矿综合研究”（编号2001CB409810）资助.致谢我们衷心感谢两位匿名审稿人及李锦轶研究员,他们对本文初稿的审阅和提出的建设性修改意见,使本文得以完成!同时感谢参加与本项研究相关野外工作的张建东、李声虎、宋安疆等以及新疆地矿局第一区域地质调查大队的有关领导和司机师傅,他们的辛勤工作和大力帮助与支持,使本项研究的野外工作得以顺利完成!

收稿日期: 2005-12-20

修回日期: 2006-04-22

刊出日期: 2006-05-31

Zircon SHRIMP dating of Silurian and Devonian granitic intrusions in the southern Yili block, Xinjiang and preliminary discussion on their tectonic setting.

ZHU ZhiXin~

Received Date: 20 December 2005

Revised Date: 22 April 2006

Publish Date: 31 May 2006

摘要

摘要: 位于新疆西天山的伊犁地块南缘发育大量古生代侵入岩,本文从前人划分的华力西期侵入岩中识别出泥盆纪和志留纪的中酸性侵入岩,对其中三个侵入体的锆石进行SHRIMP U-Pb定年研究,分别获得436±8Ma、370±7Ma、366±8Ma的~(206)Pb/~(238)U表面年龄;同时对其岩石学和地球化学进行了研究,结果显示该区志留纪、泥盆纪侵入岩均具有较典型的活动陆缘侵入岩的特征,结合该活动陆缘区域岩浆活动资料以及前人研究成果,初步确定志留纪至早石炭世期间,南天山碰撞造山带前身洋盆的洋岩石圈板块一直在向伊犁地块之下俯冲。
- 西天山 /
- 伊犁地块南缘 /
- 锆石SHRIMP /
- U-Pb定年 /
- 侵入岩 /
- 活动陆缘
- Xinjiang /
- Western Tianshan /
- Southern margin of Yili block /
- Zircon SHRIMP U-Pb dating /
- Intrusions /

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新疆伊犁地块南缘志留纪和泥盆纪花岗质侵入体锆石SHRIMP定年及其形成时构造背景的初步探讨

Zircon SHRIMP dating of Silurian and Devonian granitic intrusions in the southern Yili block, Xinjiang and preliminary discussion on their tectonic setting.

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