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世界地质 2023, 42(2) 256-269 DOI: ISSN: 1004-5589 CN: 22-1111/P

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	磷灰石
	锆石
	裂变径迹
	构造隆升
	中新生代
	青藏高原
	本文作者相关文章
	金文正
	王俊鹏
	白万奎
	叶治续
	PubMed
	Article by JW
	Article by Wang J
	Article by Bai W
	Article by Ye Z

青藏高原东部中新生代差异隆升的热年代学证据

金文正1,2 , 王俊鹏3 , 白万奎4 , 叶治续5

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

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 (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?

关键词：磷灰石锆石裂变径迹构造隆升中新生代青藏高原

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

JIN Wenzheng 1,2 , WANG Junpeng 3 , BAI Wankui 4 , YE Zhixu 5

1.School of Energy Resources, China University of Geosciences, Beijing 100083, China;

2.State Key Laboratory for Petroleum Resource and Prospecting, Beijing 102249, China;

3.Hangzhou Institute of Petroleum Geology, PetroChina, Hangzhou 310023, China;

4.Geophysical Research Institute of Sinopec Shengli Oilfield Branch, Dongying 257000, Shandong, China;

5.Jidong Oilfield Branch Company, PetroChina, Tangshan 063200, Hebei, China

Abstract: 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. Be? sides, the fission track ages in the northeast and east are relatively old. The tectonic uplift in the northwestern mar? gin of the study area was relatively early (200??160 Ma), while the tectonic uplift in the southeastern part was rela? tively late (140??30 Ma), and the tectonic uplift in the western part (including southwest) was the latest (90??10Ma). 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 Lix? ian (23.26 ℃ / Ma and 0.78 mm / a, respectively) and this zonal variability is mainly governed by multiple regional large fracture zones.

Keywords: apatite zircon fission track tectonic uplift Meso??Cenozoic Qinghai??Tibet Plateau

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