| 东天山红柳河地区蛇绿岩U-Pb同位素年龄 |
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| 引用本文：于福生,李金宝,王涛.2006.东天山红柳河地区蛇绿岩U-Pb同位素年龄[J].地球学报,27(3):213-216. |
| DOI：10.3975/cagsb.2006.03.04 |
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| 基金项目:国土资源部1∶5万《红柳河站幅》、《芦苇井幅》和区域地质调查项目[甘地勘地发(1996)17号] |
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| 中文摘要:采用锆石U-Pb方法对东天山红柳河蛇绿岩中辉长岩进行了测试,得到206Pb/238U表面年龄加权平均值为425.5±2·3Ma,代表辉长岩的侵入年龄,说明红柳河蛇绿岩形成于早志留世,相当于文罗克世(Wenlock)哥利顿期(Gleedonian)。这一年龄结果表明早志留世中天山结晶基底已开始从塔里木板块北缘分离出去形成离散地体。 |
| 中文关键词:东天山 红柳河 蛇绿岩 U-Pb同位素年龄 |
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| The U-Pb Isotopic Age of Zircon from Hongliuhe Ophiolites in East Tianshan Mountains, Northwest China |
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| Abstract:The U-Pb isotopic age of zircon from gabbro in Hongliuhe ophiolites is about 425.5±2.3 Ma. This age that can be considered to be the formation time of the gabbro shows that the ophiolites were formed in Early Silurian, corresponding to Gleedonian period of Wenlock. The result indicates that the central Tianshan Mountains were separated from the Tarim plate and formed a discrete terrain in Early Silurian. |
| keywords:East Tianshan Mountains Hongliuhe area ophiolites U-Pb isotope age |
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