中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 南京地质古生物研究所
  3. 中国科学院南京地质古生物研究所
Unraveling the Early Devonian provenance of the Longmenshan region through detrital zircon records: Implications for floral differentiation in South China

文献类型：期刊论文

作者Zhang, Yan-Xiong3,4; Zheng, Bo2,3,4; Zhang, Xiao-Le1; Huang, Pu1
刊名PALAEOWORLD
出版日期2024-06-01
卷号33期号:3页码:570-583
关键词Detrital zircon U-Pb geochronology Devonian Longmenshan region Paleogeography
ISSN号1871-174X
DOI10.1016/j.palwor.2023.05.003
通讯作者Zheng, Bo(cambrianzb@foxmail.com) ; Huang, Pu(puhuang@nigpas.ac.cn)
英文摘要The Longmenshan region is the geographical boundary between the Sichuan Basin and the eastern Tibetan Plateau, but whether it is the tectonic boundary between the Yangtze Block and Songpan-Garze terrane is still controversial. Meanwhile, the Early Devonian floral differentiation between the Longmenshan region and the southern part of the Yangtze Block, such as Yunnan and Guizhou provinces, also leads to controversy. Here we report U -Pb ages of detrital zircons from Lower Devonian sandstones of the Longmenshan region, providing evidence to discuss the tectonic affinity of the Longmenshan region and possible reasons for the Early Devonian floral differentiation. Detrital zircon U -Pb age patterns show that the Pingyipu Group defines three principal age populations of 2.6-2.4 Ga, 1.2-0.7 Ga, and 0.7-0.5 Ga, with two minor distributions of 1.8-1.5 Ga and 480-420 Ma. This U -Pb age spectrum is consistent with that of the Lower Devonian Danlin Formation of Guizhou, indicating that the Pingyipu Group and the Danlin Formation might share the same or similar sources. Together with fossil evidence, it is suggested that the Devonian sedimentary successions in the Longmenshan region are deposited in the western margin of the Yangtze Block, indicating the western boundary of this block is likely in somewhere to the west of Longmenshan fault, such as the Longriba fault. The Neoproterozoic strata located between the Longmenshan region and Yunnan-Guizhou provinces contain dominant Paleoproterozoic detrital zircons (2.1-1.9 Ga), however, this population is almost absent in the Pingyipu Group and the Danlin Formation, suggesting that there might not exist a denudation area (about 3000 masl) to supply sediments for Lower Devonian strata and separate the Longmenshan region and Guizhou. Therefore, the Early Devonian floral differentiation between the Longmenshan region and Yunnan-Guizhou provinces might not be caused by tectonic or mountainous barriers as previously suggested, but instead, might be caused by different depositional ages of the strata at a finer temporal resolution and environmental factors, such as different climatic conditions and/or habitat heterogeneity. (c) 2023 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
WOS关键词NORTHERN TIBET IMPLICATIONS ; U-PB AGE ; YANGTZE BLOCK ; TECTONIC EVOLUTION ; CRUSTAL EVOLUTION ; SILICICLASTIC ROCKS ; SEDIMENTARY-ROCKS ; SICHUAN PROVINCE ; XITUN FORMATION ; TRACE FOSSILS
资助项目National Natural Science Foundation of China[41802003] ; National Natural Science Foundation of China[41972121] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; Second Tibetan Plateau Scientific Expedition and Research[2019QZKK0706] ; Research and Innovation Fund for Graduate Students of Southwest Petroleum University[2022KYCX042]
WOS研究方向Paleontology
语种英语
WOS记录号WOS:001257926000001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research ; Research and Innovation Fund for Graduate Students of Southwest Petroleum University
源URL[http://ir.nigpas.ac.cn/handle/332004/43900]  
专题中国科学院南京地质古生物研究所
通讯作者Zheng, Bo; Huang, Pu
作者单位1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
2.Southwest Petr Univ, Qiangtang Inst Sedimentary Basin, Chengdu 610500, Peoples R China
3.Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Peoples R China
4.Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Yan-Xiong,Zheng, Bo,Zhang, Xiao-Le,et al. Unraveling the Early Devonian provenance of the Longmenshan region through detrital zircon records: Implications for floral differentiation in South China[J]. PALAEOWORLD,2024,33(3):570-583.
APA Zhang, Yan-Xiong,Zheng, Bo,Zhang, Xiao-Le,&Huang, Pu.(2024).Unraveling the Early Devonian provenance of the Longmenshan region through detrital zircon records: Implications for floral differentiation in South China.PALAEOWORLD,33(3),570-583.
MLA Zhang, Yan-Xiong,et al."Unraveling the Early Devonian provenance of the Longmenshan region through detrital zircon records: Implications for floral differentiation in South China".PALAEOWORLD 33.3(2024):570-583.

入库方式： OAI收割

来源：南京地质古生物研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。