An early mesozoic transcontinental palaeoriver in south China

Evidence from detrital zircon U-Pb geochronology and Hf isotopes

Zhenbing She, Changqian Ma, Yusheng Wan, Jinyang Zhang, Min Li, Ling Chen, Wenjing Xu, Yanqing Li, Longfei Ye, Jian Gao

Research output: Contribution to journalArticle

17 Citations (Scopus)

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 ε 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.

Original languageEnglish
Pages (from-to)353-362
Number of pages10
JournalJournal of the Geological Society
Volume169
Issue number3
DOIs
Publication statusPublished - May 2012
Externally publishedYes

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geochronology
craton
zircon
Triassic
Jurassic
sandstone
isotope
Pacific plate
lithofacies
basin
westerly
sediment
provenance
continental margin
Archean
subduction
crust
draining
analysis

ASJC Scopus subject areas

  • Geology

Cite this

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; Gao, Jian.

In: Journal of the Geological Society, Vol. 169, No. 3, 05.2012, p. 353-362.

Research output: Contribution to journalArticle

She, Zhenbing ; Ma, Changqian ; Wan, Yusheng ; Zhang, Jinyang ; Li, Min ; Chen, Ling ; Xu, Wenjing ; Li, Yanqing ; Ye, Longfei ; Gao, Jian. / An early mesozoic transcontinental palaeoriver in south China : Evidence from detrital zircon U-Pb geochronology and Hf isotopes. In: Journal of the Geological Society. 2012 ; Vol. 169, No. 3. pp. 353-362.
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