沉积与特提斯地质Issue(1)：102-107,6.
西藏冈底斯西部地区印支期闪长岩的特征及其地质意义
The discovery and significance of the Indosinian diorites in western Gangdise,Xizang
彭建华 1赵希良 1何俊 1黄韶春 1龚臣1
作者信息
- 1. 江西省地矿局九一五地质大队，江西 南昌 330002
- 折叠
摘要
Abstract
The determinations of LA-ICP-MS zircon U-Pb dating,isotopic compositions and major elements give a magmatic crystallization age of 207. 3 ± 3. 6 Ma for the pyroxene amphibole monzodiorite from the Daggyai Lake area,Coqen,western Gangdise,Xizang. The origin of matter may be related with the lower crustal basic lava and partial melting of the upper mantle. The late Indosinian intrusive rocks discovered for the first time in western Gangdise were formed in the orogenic tectonic setting,and attested to the continuous subduction of the Tethyan Ocean during the late Indosinian. The findings in this study will provide useful approaches to the tectonic evolution of the Gangdise region during the late Indosinian.关键词
锆石U-Pb定年/印支期闪长岩/冈底斯西部/西藏Key words
zircon U-Pb dating/Indosinian diorite/western Gangdise/Xizang分类
天文与地球科学引用本文复制引用
彭建华,赵希良,何俊,黄韶春,龚臣..西藏冈底斯西部地区印支期闪长岩的特征及其地质意义[J].沉积与特提斯地质,2014,(1):102-107,6.
