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A combined methodology for reconstructing source-to-sink basin evolution, exemplified by the Triassic Songpan-Ganzi basin, central China

文献类型：期刊论文

作者Chen, Guohui3; Hu, Fangyang2,4,5; Robertson, Alastair H. F.6; Garzanti, Eduardo7; Zhang, Shaohua1,2; Wu, Fu-Yuan1,2
刊名SEDIMENTARY GEOLOGY
出版日期2023-12-01
卷号458页码:18
ISSN号0037-0738
关键词Detrital zircon geochronology Paleo-elevation Proto-source contribution Provenance Songpan-Ganzi basin
DOI10.1016/j.sedgeo.2023.106529
英文摘要Source-to-sink evolution of a basin is a key to understand sedimentary processes, especially in a complex regional orogenic setting. Detrital zircon populations can be traced from their primary sources to their depositional settings. The resulting interpretations are enhanced by calculation of the adjacent orogen's paleoaltimetry, which provides additional insights into paleogeography. In this study, we present a combined methodology which aims to reconstruct source-to-sink evolution by the analysis of detrital zircon age distribution in sandstones, together with the calculation of paleo-elevation of surrounding orogens based on the chemical compositions of coeval magmatic rocks. We test the method using detrital zircon U-Pb geochronological data sets from the Triassic Songpan-Ganzi basin in central China, combined with whole-rock geochemical data from intermediatecomposition magmatic rocks in adjacent crustal blocks. Application of the combined methodology supports a syn-collisional basin model for the formation of the Triassic Songpan-Ganzi basin in preference to a continental back-arc basin. The clastic sediments, mainly deep-marine turbidites, accumulated in a remnant Paleotethyan Ocean that was surrounded by the converging North China Block, South China Block, East Kunlun Orogenic Belt and the Qiangtang Block. The North China Block and the North Qaidam Block were major proto-sources of detrital zircons to the basin, contributing on average 12 % and 15 %, respectively. Triassic magmatic rocks in the East Kunlun and Qiangtang regions were major sources of igneous zircons, up to 68 % for the former and up to 56 % for the latter. Despite being located at a calculated elevation of ca. 4000 m, the Qinling Orogenic Belt contributed only ca. <10 % of the zircons, mostly restricted to the eastern depocenter of the basin. In contrast, supply from the North Qiangtang Block, despite its calculated lower elevation (1000-3000 m), accounts for 2- 10 % of the detrital zircons in the basin, suggesting high erosion rates of this block. The minimal supply of zircons from the South China Block, restricted to 3-6 % in the central and western depocenters, is inconsistent with the zircon abundances predicted in the alternative back-arc basin model of the Songpan-Ganzi basin. (c) 2023 Elsevier B.V. All rights reserved.
WOS关键词ZIRCON U-PB ; TETHYS OCEAN CONSTRAINTS ; EASTERN TIBETAN PLATEAU ; WESTERN YANGTZE BLOCK ; QINLING OROGENIC BELT ; LU-HF ISOTOPES ; DETRITAL ZIRCON ; NORTH-CHINA ; TECTONIC EVOLUTION ; SOUTH CHINA
资助项目National Natural Science Foundation of China[42002126] ; National Natural Science Foundation of China[91755000] ; National Natural Science Foundation of China[41902055]
WOS研究方向Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:001114496600001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/111161]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Hu, Fangyang
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Hohai Univ, Sch Earth Sci & Engn, Nanjing 210098, Peoples R China
4.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, Beijing 100029, Peoples R China
5.Univ Arizona, Dept Geosci, Tucson, AZ USA
6.Univ Edinburgh, Grant Inst, Sch GeoSci, James Hutton Rd, Edinburgh EH9 3FE, Scotland
7.Univ Milano Bicocca, Dept Earth & Environm Sci, Lab Provenance Studies, I-20126 Milan, Italy
推荐引用方式
GB/T 7714		 Chen, Guohui,Hu, Fangyang,Robertson, Alastair H. F.,et al. A combined methodology for reconstructing source-to-sink basin evolution, exemplified by the Triassic Songpan-Ganzi basin, central China[J]. SEDIMENTARY GEOLOGY,2023,458:18.
APA Chen, Guohui,Hu, Fangyang,Robertson, Alastair H. F.,Garzanti, Eduardo,Zhang, Shaohua,&Wu, Fu-Yuan.(2023).A combined methodology for reconstructing source-to-sink basin evolution, exemplified by the Triassic Songpan-Ganzi basin, central China.SEDIMENTARY GEOLOGY,458,18.
MLA Chen, Guohui,et al."A combined methodology for reconstructing source-to-sink basin evolution, exemplified by the Triassic Songpan-Ganzi basin, central China".SEDIMENTARY GEOLOGY 458(2023):18.

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来源：地质与地球物理研究所

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