Zircon SHRIMP U-Pb geochronology and petrogenesis of the plagiogranites from the Lagkor Lake ophiolite,Gerze,Tibet,China

被引：0

作者：

ZHANG YuXiu ZHANG KaiJun LI Bing WANG Yang WEI QingGuo TANG XianChun Key Laboratory of Marginal Sea Geology Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou China Graduate University Chinese Academy of Sciences Beijing China Department of Earth Sciences Nanjing University Nanjing China ^{[1
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机构：

来源：

ChineseScienceBulletin | 2007年 / 05期

关键词：

Tibet; Gerze; plagiogranite; zircon; SHRIMP U-Pb geochronology;

D O I：

暂无

中图分类号：

P597.3 [];

学科分类号：

070902 ;

摘要：

Field relationship, along with petrographical, petrological, and geochemical characteristics, and zircon populations, indicates that the plagiogranites from the Lagkor Lake ophiolite in the Bangong-Nujiang suture zone （~ 20 km south of Gerze County, central Tibet, China）, derived from anatexis of hydrated gabbros by ductile shearing during transport of the oceanic crust. Therefore, this kind of plagiogranite is coeval to or little later than the spreading of the oceanic crust. Zircon SHRIMP age of 166 ± 2.5 Ma for the plagiogranites indicates that an oceanic basin existed in the western part of the Bangong-Nujiang zone in the Middle Jurassic.

引用

页码：651 / 659

页数：9

共 3 条

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[2]

The origin of oceanic plagiogranites from the karmoy ophiolite, western Norway[J] . Rolf B. Pedersen,John Malpas.Contributions to Mineralogy and Petrology . 1984 (1)

[3]

Petrology and geochemistry of plagiogranite in the Canyon Mountain ophiolite, Oregon[J] . David C. Gerlach,William P. Leeman,Hans G. Avé Lallemant.Contributions to Mineralogy and Petrology . 1981 (1)

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