%0 Journal Article
%T K-Ar age of the Cenozoic volcanic rocks in the Nangqen Basin, Qinghai Province and its geological significance
%A DENG Wanming
%A <br>.
%J 科学通报(英文版)
%D 2000
%I 
%X The Nangqen Basin is one of the typical shearing-extensional basins situated in the north part of the Hengduan Mts. Nine ages of the Cenozoic volcanic rocks from the basin by K-Ar isotope-dilution technique have been reported in the note. The apparent ages of whole rock and separated biotite range from 32.04 to 36.50 Ma. The40Ar-K (%) correlation isochronal line shows that there existed neither argon excessing, nor radiogenetic argon loosing, i.e. the age represents the true diagenetic time. Volcanic activity in this area occurred in the post-collision environment and is controlled by lithosphere substantial thickening and violent intercontinental shearing-strike slip faults. There is age difference of the magmatic activity in the east, the west and the north Tibet. The multi-periodic eruption-intrusion of the magmatic melt since Cenozoic is a tracer showing the pulsating uplift of the Tibetan Plateau.
%K Nangqen Basin
%K volcanic rocks
%K K-Ar age
%K Tibetan Plateau
%K plateau uplift<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=7E9CD3FBAB02006A&yid=9806D0D4EAA9BED3&vid=94E7F66E6C42FA23&iid=708DD6B15D2464E8&sid=C368DFEE1EA2C91D&eid=CBC69BEA05C12902&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=2&reference_num=11