LA-ICP-MS Zircon U-Pb Dating for Jieerkuduke Acidic Dykes in the Southern Altay Range
详细信息
- 责任者：Shen Xiaoming (Key Laboratory of Crustal Dynamics ; Institute of Crustal Dynamics ; China Earthquake Administration ; Beijing 100085 ; China) ; Zhang Haixiang
- 刊名：Xinjiang Geology
- 出版年：2013
- 卷期：31(3)
- 关键词：流纹斑岩 ; rhyolite porphyry ; 铀—铅计时 ; U-Pb dating ; 阿尔泰山 ; Altai Mountains
- 页码：p.157-161
- 图表：4 illus., 2 tables, 34 refs.
- 分类号：0801
- issnNo：ISSN1000-8845
- isbnNo：CN65-1092/P
摘要
Field investigation revealed a series of acidic dyke swarm distributed in the Jieerkuduke area to the south of Ertix fault belt in the Southern Altay Range.The acidic dykes intruded in the Carboniferous volcanic-sedimentary rock sequence and the rocks of the dyke are rhyolite-porphyries.LA-ICP-MS zircon U-Pb dating indicates that the acidic dykes were formed at(279±3) Ma.Since dyke is the significant symbol of lithospheric(or crustal) extension,this dating provides important evidence for the Early Permian lithospheric extension in the Southern Altay Range.
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