Late Cenozoic episodic uplifting in southeastern part of the Tibetan plateau-evidence from Ar-Ar thermochronology.
Late Cenozoic episodic uplifting in southeastern part of the Tibetan plateau-evidence from Ar-Ar thermochronology.
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发表时间：
2006
影响因子：
1.8
通讯作者：
C. Wen;Zhan Yan
中科院分区：
文献类型：
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作者：
C. Wen;Zhan Yan
Ar-Ar热年代学研究表明，在鲜水河断裂带晚新生代持续左旋走滑期间，断裂带不同部位出现了差异性隆升。与黑云母Ar同位素系统闭合温度比较，鲜水河断裂带北部西部、中部和南部东部抬升和冷却350℃的时间分别为10.39~10.13Ma、5.70~4.42Ma和3.60~3.46Ma。分别为1Ma，5.7~4.4Ma和~3.6Ma。
The Xianshuihe fault zone,located in southeastern part of the Tibetan plateau,is a huge and active sinistral strike-slip fault zone.Isotope chronological study on this fault zone can provide age evidence on the mass transport and uplifting history in southeastern part of the Tibetan plateau.Ar-Ar thermochronological study show that during the late Cenozoic sustained sinistral strike- slipping of the Xianshuihe fault zone,the differential uplifting occurred in different part of the Fault zone.Comparing with the Ar isotope system closure temperature of biotite,the time of uplifting and cooling through 350℃in the westnorthern part,the middle part and the eastsouthern part of the Xianshuihe fault zone is 10.39～10.13Ma,5.70～4.42Ma and 3.60～3.46Ma respectively. This result prove that southeastern part of the Tibetan plateau has experienced episodic uplifting since late Cenozoic and the episodic uplifting time is～10.1Ma,5.7～4.4Ma and～3.6Ma respectively.