青藏高原东部中新生代差异隆升的热年代学证据  

Thermochronological evidence for the differential uplift since Meso-Cenozoic in eastern Qinghai-Tibet Plateau

作　　者：金文正[1,2] 王俊鹏 白万奎 叶治续[5] JIN Wenzheng;WANG Junpeng;BAI Wankui;YE Zhixu(School of Energy Resources,China University of Geosciences,Beijing 100083,China;State Key Laboratory for Petroleum Resource and Prospecting,Beijing 102249,China;Hangzhou Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China;Geophysical Research Institute of Sinopec Shengli Oilfield Branch,Dongying 257000,Shandong,China;Jidong Oilfield Branch Company,PetroChina,Tangshan 063200,Hebei,China)

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]油气资源与探测国家重点实验室,北京102249 [3]中国石油杭州地质研究院,杭州310023 [4]中国石化胜利油田分公司物探研究院,山东东营257000 [5]中国石油冀东油田分公司,河北唐山063200

出　　处：《世界地质》2023年第2期256-269,共14页World Geology

基　　金：国家自然科学基金项目(41002072);油气资源与探测国家重点实验室开放课题基金(PRP/open-1307)联合资助。

摘　　要：为定量分析青藏高原东北部中新生代以来构造隆升时序及特征,笔者开展了磷灰石和锆石裂变径迹年龄测试。结果表明:研究区磷灰石裂变径迹年龄为[BF](66±9)~(4.3±1)Ma,锆石裂变径迹年龄为(187±11)~(69±4)Ma,东北部及东部裂变径迹年龄值较大;研究区西北缘构造隆升较早(200~160 Ma),东南部隆升相对较晚(140~30 Ma),西(南)部构造隆升最晚(90~10 Ma),新近纪之后则整体进入构造隆升;岩石冷却速率和剥蚀速率广元—江油一带西侧较高,红原—文县一带南侧更高,理县附近最大,分别为23.26℃/Ma和0.78 mm/a,这种分区差异性主要受多条区域性大型断裂带制约。In order to quantitatively analyze the chronological order and characteristics of tectonic uplift since Meso-Cenozoic in the northeastern part of Qinghai-Tibet Plateau,the authors carried out fission track dating test and analysis for apatite and zircon.The results reveal that the apatite fission track ages in the study area range from(66±9)Ma to(4.3±1)Ma,and the zircon fission track ages range from(187±11)Ma to(69±4)Ma.Besides,the fission track ages in the northeast and east are relatively old.The tectonic uplift in the northwestern margin of the study area was relatively early(200-160 Ma),while the tectonic uplift in the southeastern part was relatively late(140-30 Ma),and the tectonic uplift in the western part(including southwest)was the latest(90-10 Ma).The overall tectonic uplift occurred after Neogene.The cooling and denudation rates of rocks are high in the west side of Guangyuan-Jiangyou area,higher in the south side of Hongyuan-Wenxian area,and highest near Lixian(23.26℃/Ma and 0.78 mm/a,respectively)and this zonal variability is mainly governed by multiple regional large fracture zones.

关 键 词：磷灰石 锆石 裂变径迹 构造隆升 中新生代 青藏高原 

分 类 号：P542[天文地球—构造地质学]