SHRIMP U-Pb and Ar-Ar Ages of the Dolerite Dyke along a Strike-Slip Fault in the Middle Segment of Yanshan
详细信息
- 责任者：Xiao Weifeng (Institute of Geomechanics ; Chinese Academy of Geological Sciences ; Beijing 100081 ; China) ; Zhou Xingui
- 刊名：Geological Bulletin of China
- 出版年：2011
- 卷期：30(11)
- 关键词：辉绿岩 ; diabase ; 铀—铅计时 ; U-Pb dating ; 氩—氩计时 ; Ar-Ar dating ; 燕山 ; Yanshan Range
- 页码：p.1721-1726
- 图表：6 illus., 2 tables, 41 refs.
- 分类号：0801
- 出版序号：20122321
- issnNo：ISSN1671-2552
- isbnNo：CN11-4648/P
摘要
There exists controversy concerning the time when the EW-trending strike-slip faults were active in the middle segment of Yanshan. Direct dating of the dolerite dyke that intruded in the fault might give the upper limit of the age. The Ar-Ar ages, which are consistent with the youngest U-Pb age, represent the cooling age of the dyke and set an upper limit of the active age of the fault. The scattered U-Pb ages are all inherited zircon ages which correspond to five regional magmatic episodes of the Yanshan orogenic belt.