Identification of Mesoproterozoic zircons in a Triassic dolerite from the Liaodong Peninsula, Northeast China

被引：0
|
作者：
Simon A. Wilde
机构：
[1] Curtin University of Technology
[2] Department of Applied Geology
[3] Perth
[4] P.O. Box U1987
[5] Western Australia 6845
来源：
Science Bulletin | 2004年 / 18期
关键词：
Grenvillian Rodinia; SHRIMP zircon U-Pb age; dolerite; Liaodong Peninsula;
D O I：
暂无
中图分类号：
P588.3 [变质岩];
学科分类号：
070901 ;
摘要：
Thick Neoproterozoic strata are widespread in the Dalian region, Liaodong Peninsula, Northeast China. SHRIMP zircon U-Pb dating of dolerite intruded into Neo-proterozoic strata gives its emplacement age as 211±2 Ma. However, abundant 0.9—1.1 Ga zircons are identified in the dolerite. The age of 1125±38 Ma corresponds with the Grenvillian collisional event. The zircons of 904±15 Ma ages have high Th/U ratios (1.31—2.25) and magmatic oscillatory zones, being possibly related to later magmatism induced during amalgamation of Rodinia.
引用
收藏
页码：1958 / 1962
页数：5
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