新生代阿尔金山脉隆升历史的裂变径迹证据
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引用本文:陈正乐,张岳桥,王小凤,陈宣华,Washburn Z.,Arrowsmith J..2001.新生代阿尔金山脉隆升历史的裂变径迹证据[J].地球学报,22(5):413-418.
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作者单位
陈正乐 中国地质科学院地质力学研究所北京100081 
张岳桥 中国地质科学院地质力学研究所北京100081 
王小凤 中国地质科学院地质力学研究所北京100081 
陈宣华 中国地质科学院地质力学研究所北京100081 
Washburn Z. Department of GeologyArizona State University, Tempe, AZ, 85287, USA 
Arrowsmith J. Department of GeologyArizona State University, Tempe, AZ, 85287, USA 
基金项目:国土资源部2000年自由探索项目(B2-38),地质行业基金项目(Qn979812),国家重点基础研究发展规划(G1998040800)
中文摘要:10个片麻岩和花岗岩的磷灰石裂变径迹年龄值位于35.6-13.6Ma之间,表明了阿尔金山脉的隆升开始于渐新世,并一直延续至中新世。山脉早期的隆升速度较低,后期可能存在一个快速的隆升时期;阿尔金山脉并非整体的均匀隆升,其内分布的NEE走向的断裂也局部控制了山体的隆升;如果山脉的隆升是阿尔金断裂左行走滑的结果,那以可推测阿尔金断裂大型左行走滑的起始时间应为渐新世。区域资料分析表明,青藏高原北缘在渐新世至中新世期间发生了大规模的、区域性的抬升。
中文关键词:新生代  阿尔金  隆升  裂变径迹
 
Fission Track Dating of Apatite Constrains on the Cenozoic Uplift of the Altyn Tagh Mountain
Abstract:samples of gneiss and granite from the Altyn Tagh Mountain are dated by fission track of apatite. The result yields ages from 35.6 Ma to 13.6 Ma, which suggests that the uplift of the Altyn Tagh mountain began from Oligocene and lasted till Miocene. During the early stage, the uplift rate was very low, and probably a quick uplift occurred later, which is supported by regional geology, structure evolution and sedimentary sequences. The result indicates that the local uplift of the mountain was also controlled by some NEE-trending faults within the mountain. As the uplift of the mountain was probably only related to the strike-slip of the Altyn Tagh fault, the authors hold that the initial age of the left-lateral strike-slip of the fault should have been Oligocene. Regional data also show that a large-scale regional uplift of mountains in the northern edge of the Qinghai-Tibetan plateau occurred during Oligocene-Miocene period.
keywords:Cenozoic  Altyn Tagh  uplift of mountain  fission track  dating of apatite
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