柴达木地块南缘昆北单元变质新元古代花岗岩锆石SHRIMPU-Pb年龄

基金项目: 教育部科技重点项目（104039）和国家自然科学基金项目（40272030）资助.致谢：本研究是在1：25万冬给措纳湖幅区域地质调查基础上进行的,研究工作得到陆松年研究员的关心和指导,CL图是由徐平摄制的,在此一半表示感谢.

Zircon SHRIMP U-Pb age of Neoproterozoic metagranite in the North Kunlun unit on the southern margin of the Qaidam block in China

Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, Hubei, China; 2. Guangxi Institute of Geological Survey, Nanning 530023,Guangxi, China; 3. Beijing SHRIMP Center, Beijing 100037 ,China

摘要: 侵入于香日德南昆北单元金水口岩群白沙河岩组中的变质花岗岩的锆石SFIRIMPu—Pb年龄约为904Ma。该年龄与东昆仑地区已有的定年数据一道，表明柴达木地块南缘存在一条中—新元古代的花岗岩深成侵入岩带，整个柴达木地块可能曾响应了全球Rodinia超大陆汇聚事件。
- 变质花岗岩 /
- 锆石SHRIMP /
- U—Pb定年 /
- Rodinia超大陆汇聚 /
- 柴达木地块南缘
Abstract: Zircon from a metagranite pluton in the Baishahe Formation of the Jinshuikou Group in the North Kunlun unit yields a SHRIMP U-Pb age of ca. 904 Ma. This age and the available dating data suggest that there exists a Meso- to Neoproterozoic granitic intrusive belt on the southern margin of the Qaidam block and that the whole Qaidam block probably regionally responded to the amalgamation event of the global Rodinia supercontinent.
- metagranite /
- zircon SHRIMP U-Pb dating /
- amalgamation of the Rodinia supercontinent /
- southern margin of the Qaidam block