%0 Journal Article
%T The exhumation evolution of the Micang Shan-Hannan uplift since Cretaceous:Evidence from apatite(U-Th)/He dating<br>米仓山-汉南隆起白垩纪以来的剥露作用:磷灰石(U-Th)/He年龄记录
%A Peter WReiners
%A <br>常远
%A 许长海
%A Peter W.Reiners
%A 周祖翼
%J 地球物理学报
%D 2010
%I 
%X The apatite (U-Th)/He dating results of 13 granitic samples collected in Nanjiang-Nanzheng transect are used to systematically study Micang Shan′s exhumation and thermo-tectonic evolution. While taking into consideration of the influence of the sample′s cooling rates and crystal sizes on (U-Th)/He closure temperatures of respective apatites, this research also quantifies the effects of topography, heat conduction, advection and production on regional geothermal gradients. The inversion results reveal a period of rapid exhumation with an average rate of ~70 m/Ma in the southern sedimentary area of Micang Shan since about 50 Ma B.P., which removed above 3 km-thick sub-surface rock in the region; the Guangwushan Complex in the middle part of Micang Shan-Hannan Uplift experienced a fast exhumation event at ~90 Ma B.P. with an exhumation rate of >75 m/Ma; the northern Hannan Uplift was exhumed to the surface with a fast rate above 40 m/Ma before ~100 Ma B.P., and then slowly with an average exhumation rate of ~10 m/Ma. The whole research region, Micang Shan-Hannan Uplift experienced a very slow exhumation with an average rate of 10~25 m/Ma during 90~50 Ma B.P.
%K Micang Shan
%K Apaptite
%K 
%K (U-Th)/He
%K Dating exhumation
%K 
%K Qinling orogen<br>米仓山
%K 
%K 磷灰石
%K 
%K (U-Th)/He
%K 
%K 剥露
%K 
%K 秦岭造山带
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=B17446CA639C3A37169C6BBCDAB69507&yid=140ECF96957D60B2&vid=8E6AB9C3EBAAE921&iid=E158A972A605785F&sid=F434A3C2A19884E7&eid=46DFDABDAA819280&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=4&reference_num=33