Early uplift and exhumation of the Tanggula granitoid pluton since the Late Cretaceous: Implications for the stepwise topographic growth model in the eastern Qiangtang terrane

doi:10.1130/B37271.1

IOCAS-IR

	Early uplift and exhumation of the Tanggula granitoid pluton since the Late Cretaceous: Implications for the stepwise topographic growth model in the eastern Qiangtang terrane
	Lu, Lu 1,2; Jin, Xin 3; Yan, Lilong 4; Li, Wen 5; Wei, Tao 5; Shen, Yulin 1,2
	2024-07-01
发表期刊	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
ISSN	0016-7606
卷号	136 期号:7-8 页码:3419-3439
通讯作者	Lu, Lu(geollulu@cumt.edu.cn)
摘要	Reconstructing the uplift process of the eastern Qiangtang terrane is crucial for understanding the growth model of the central Tibetan Plateau. However, due to the limited amount of data available, it is not well constrained. The Tanggula granitoid pluton is an outstanding geological feature in the eastern Qiangtang terrane, and thus could provide crucial constraints on its uplift history. We applied multiple thermochronologic systems over a broad temperature range, including apatite U-Pb, biotite and K-feldspar 40 Ar/ 39 Ar, apatite and zircon fission-track, and zircon (U-Th)/He, to study samples from the Tanggula granitoid pluton. The results exhibit the expected relative age order of these thermochronologic systems, with 242- 238 Ma apatite U-Pb ages, 218-204 Ma biotite 40 Ar/ 39 Ar ages, 197-191 Ma K-feldspar 40 Ar/ 39 Ar ages, 94-81 Ma zircon fission-track ages, 70-58 Ma zircon (U-Th)/He ages, and 61-39 Ma apatite fission-track ages. Using these thermochronologic ages and thermal history modeling results, we reconstructed a comprehensive thermal history for the pluton, from which three rapid cooling phases were revealed. The earliest rapid cooling phase (220-180 Ma; similar to 5.25 degrees C/m.y.) closely followed the emplacement of the Tanggula granitoid pluton, and thus is primarily an expression of natural cooling triggered by conduction with the surrounding rocks. In contrast, the rapid cooling during 100-60 Ma and since 20 Ma can be interpreted to represent intense exhumation, with corresponding exhumation of 5.0-6.0 km and 2.3-2.8 km, as well as an average exhumation rate of 0.125-0.150 mm/yr and 0.115-0.140 mm/yr, respectively. According to the thermal history, the earliest uplift in the Tanggula region could have been initiated as early as the Late Cretaceous. Using the published data, we determined that the onset of rapid uplift and exhumation in the entire eastern Qiangtang terrane had a northeastward, stepwise propagation process. The region within or around Anduo first experienced rapid uplift and exhumation that initiated during the late Early Cretaceous (ca. 130 Ma), the Tanggula region to the northeast experienced rapid uplift and exhumation that initiated during the Late Cretaceous (ca. 100 Ma), and the region farther to the northeast in Tuotuohe and Yushu-Nangqian experienced rapid uplift and exhumation that initiated in the late Paleocene (ca. 60 Ma). The northeastward stepwise uplift and exhumation in the eastern Qiangtang terrane was likely caused by the combined Lhasa-Qiangtang and India-Asia continental collisions.
DOI	10.1130/B37271.1
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42002218] ; National Natural Science Foundation of China[42002071] ; National Natural Science Foundation of China[42302048] ; The 13th Young Teachers Sailing Plan of China University of Mining and Technology ; High Level Personal Project of Jiangsu Province[JSS-CBS20211215]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001271861600002
出版者	GEOLOGICAL SOC AMER, INC
WOS关键词	CENTRAL TIBETAN PLATEAU ; INDIA-ASIA COLLISION ; APATITE (U-TH)/HE THERMOCHRONOMETRY ; CENOZOIC BASIN EVOLUTION ; HOH XIL BASIN ; TECTONIC EVOLUTION ; SOUTHERN TIBET ; NORTHERN TIBET ; GANGDESE BATHOLITH ; COOLING HISTORY
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/186264
专题	中国科学院海洋研究所
通讯作者	Lu, Lu
作者单位	1.China Univ Min & Technol, Key Lab Coalbed Methane Resources & Reservoir Form, Minist Educ China, Xuzhou 221116, Peoples R China 2.China Univ Min & Technol, Sch Resources & Geosci, Xuzhou 221116, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 4.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 5.PetroChina Huabei Oilfield Co, Explorat & Dev Res Inst, Renqiu 062552, Peoples R China
推荐引用方式 GB/T 7714	Lu, Lu,Jin, Xin,Yan, Lilong,et al. Early uplift and exhumation of the Tanggula granitoid pluton since the Late Cretaceous: Implications for the stepwise topographic growth model in the eastern Qiangtang terrane[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2024,136(7-8):3419-3439.
APA	Lu, Lu,Jin, Xin,Yan, Lilong,Li, Wen,Wei, Tao,&Shen, Yulin.(2024).Early uplift and exhumation of the Tanggula granitoid pluton since the Late Cretaceous: Implications for the stepwise topographic growth model in the eastern Qiangtang terrane.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,136(7-8),3419-3439.
MLA	Lu, Lu,et al."Early uplift and exhumation of the Tanggula granitoid pluton since the Late Cretaceous: Implications for the stepwise topographic growth model in the eastern Qiangtang terrane".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 136.7-8(2024):3419-3439.