西藏北部巴毛穷宗—涌波错—羌巴欠火山岩类型、^(40)Ar-^(39)Ar年龄及其地质意义

The Types of Volcanic Rocks for the Bamaoqiongzong,Yongbocuo and Qiangbaqian in the Northern Tibet, the Dating of ^(40)Ar-^(39)Ar and Its Geological Implications

通过岩石化学和40Ar-39Ar定年研究结果:巴毛穷宗钾质碱性火山岩,涌波错和羌巴欠钙碱性火山岩,40Ar-39Ar坪年龄分别为30~26Ma、18Ma和15~14Ma,并对该区火山岩的性质和时空演化规律与青藏高原隆升的内在联系进行了探讨。

The studies of geochemistry and dating of Ar-Ar shows that the dating results are 30-26 Ma. 18 Ma and 15 - 14 Ma for the potassic alkali-rocks of Bamaoquanzong and the lime-alkali rocks of Yongbocuo and Qiangbaqian. And then the inherent relationships of the characteristic of these vocanic rocks, the rules of time and space and the upwarp of the Tibet were discussed.