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

作　　者：夏斌[1] 林清茶[1] 张玉泉[1] 邓万明[2] 

机构地区：[1]中国科学院边缘海地质重点实验室 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《地质学报》2006年第11期1676-1682,共7页Acta Geologica Sinica

基　　金：国家自然科学重点基金项目(编号40534019);中国科学院知识创新工程重要方向项目(编号KZCX2-SW-117)资助的成果

摘　　要：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.

关 键 词：AR-AR年龄 碱性岩 巴毛穷宗 涌波错 羌巴欠 西藏北部 

分 类 号：P588.14[天文地球—岩石学]