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An early Mesozoic transcontinental palaeoriver in south China; evidence from detrital zircon U-Pb geochronology and Hf isotopes

She Zhenbing, Ma Changqian, Wan Yusheng, Zhang Jinyang, Li Min, Chen Ling, Xu Wenjing, Li Yanqing, Ye Longfei and Gao Jian
An early Mesozoic transcontinental palaeoriver in south China; evidence from detrital zircon U-Pb geochronology and Hf isotopes
Journal of the Geological Society of London (May 2012) 169 (3): 353-362

Abstract

Detrital zircon geochronology reveals that Late Triassic-Early Jurassic fluvial sandstones from the major basins of the South China Craton have similar age patterns and define four populations at 2.6-2.4 Ga, 2.0-1.7 Ga, 850-700 Ma and 480-210 Ma. The late Palaeoproterozoic group is predominant in all of the five samples, and yielded remarkable age peaks at c. 1.85 Ga. These zircons have epsilon (sub Hf) (t) values between -22.5 and +3.6, suggesting derivation from reworked Archaean crust and minor juvenile crustal additions in the late Palaeoproterozoic. These characteristics differ from those of the Yangtze Block but correlate well with those of samples from the eastern Cathaysia Block. Palaeocurrent analysis of the Early Mesozoic sandstones shows predominant west- and NW-directed palaeoflows, supporting derivation of the sediments from the Cathaysia Block. The remarkable similarities in provenance signatures and spatial changes of lithofacies of the Triassic-Jurassic around the South China Craton delineate an east-west-trending sedimentary zone extending from Korea to West China. Accumulation of these sediments was probably related to the development of an active continental margin produced by westward subduction of the Palaeo-Pacific Plate. A c. 2000 km long westerly draining transcontinental palaeoriver probably had existed in the Early Mesozoic and fed the basins in Korea, South China and West China.


ISSN: 0016-7649
EISSN: 2041-479X
Coden: JGSLAS
Serial Title: Journal of the Geological Society of London
Serial Volume: 169
Serial Issue: 3
Title: An early Mesozoic transcontinental palaeoriver in south China; evidence from detrital zircon U-Pb geochronology and Hf isotopes
Affiliation: State Key Laboratory of Geological Processes and Mineral Resources, Wuhan, China
Pages: 353-362
Published: 201205
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 83
Accession Number: 2012-056752
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. sketch map
N27°00'00" - N31°00'00", E106°00'00" - E118°00'00"
Secondary Affiliation: China University of Geosciences, CHN, ChinaChinese Academy of Geological Sciences, CHN, ChinaChina Aero Geophysical Survey and Remote Sensing Centre for Land and Resources, CHN, China
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201229
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