Age and Tectonic Significance of the Mafic Dyke Swarm in the Kuruktag Region, Xinjiang |
| |
Authors: | ZHANG Zhicheng GUO Zhaojie and LIU Shuwen |
| |
Institution: | ZHANG Zhicheng,GUO Zhaojie and LIU ShuwenDepartment of Geology,Peking University,Beijing Hao Zhiguo Zhu Xiling |
| |
Abstract: | The mafic dykes are composed of a series of northwest-trending diabase in Kuokesu of the Kuruktag region, Xinjiang. Four whole-rock samples of the mafic dykes in the region give an 40Ar / 36Ar-40K/ 36Ar isochron age of 282 Ma with the initial 40Ar/ 36Ar = 507. The characteristics of the major, trace and rare earth elements of the dyke rocks indicate that they belong to the calc-alkaline series and were emplaced in extensional structures at an intermediate depth of the crust. This shows that there was a large-scale extension in the Permian Period, which might be associated with the post-collisional extension of the ancient Tianshan Mountains. |
| |
Keywords: | dyke swarm geochemistry isochron age Permian Tianshan Mountains |
本文献已被 CNKI 等数据库收录! |
| 点击此处可从《Acta Geologica Sinica》浏览原始摘要信息 |
| 点击此处可从《Acta Geologica Sinica》下载免费的PDF全文 |