地质通报2016，Vol.35Issue(4)：599-604,6.
内蒙古阿拉善地区沙拉扎山花岗岩体TIMS锆石U-Pb年龄
TIMS zircon U-Pb isotopic dating of Salazha Mountain granites from the North Margin of Alxa, Inner Mongolia, and its tectonic implications
摘要
Abstract
The Salazha Mountain on the north margin of Alxa Block is situated at the conjunction of North China Block and Tarim Block, or between Enger Us ophiolites belt and Quaganqulu ophiolites belt. To determine its magmatic issues, the authors collected samples from distinct positions of Salazha Mountain so as to conduct TIMS zircon U-Pb isotopic dating. The result shows that the granities were formed during Indosinian period. The ages of the three sampling spots are 233.1 ± 5.8Ma, 228.1 ± 0.4Ma, and 207.7 ± 0.8Ma,representing the formation age of Salatoerhan granodiorite, Wuliji granite and granodiorite, respectively. A comparative analy⁃sis of the previous geochronologic results indicates that the Salazha granitic batholiths resulted from the superimposition of the follow⁃ing four magmatic stages, namely late Early Permian(273~274Ma), Early Triassic(248~252Ma), early Late Triassic(228~236Ma)and Late Triassic(207Ma). Theses magmatic activities are also seen in the Bayin-Nuoergong area, which has been taken as the margin of North China Block.关键词
阿拉善北缘/沙拉扎山花岗质/TIMS锆石U-Pb年龄Key words
north margin of Alxa/Salazha Mountain granitic pluton/TIMS zircon U-Pb ages分类
天文与地球科学引用本文复制引用
赵泽霖,李俊建,党智财,唐文龙,付超,王守光,刘利双,赵丽君,刘晓雪..内蒙古阿拉善地区沙拉扎山花岗岩体TIMS锆石U-Pb年龄[J].地质通报,2016,35(4):599-604,6.基金项目
中国地质调查局项目（编号1212010561510、1212010811061、1212011120330、12120114001201、1212010781028、1212011085488）、国土资源公益性行业科研专项（编号200811010）和国家国际科技合作项目 （）
