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Detrital zircon evidence for the reactivation of an Early Paleozoic syn-orogenic basin along the North Gondwana margin in South China

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Author(s)

W. Yu, Y. Du, P.A. Cawood, Y. Xu, J. Yang

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Abstract

The Early Paleozoic Lian-Shao Basin, South China, is a syn-orogenic basin that developed on the northern margin of Gondwana in response to the Kwangsian orogeny. U-Pb detrital zircon age patterns from Middle Ordovician to Lower Silurian sandstones around the Jiangnan Uplift within the basin provide evidence for exhumation and erosion of the basin basement. The majority of the samples from both east and west of the Jiangnan Uplift display similar age distributions with a dominant peak between 1000 and 900. Ma and subordinate peaks at ~. 2500. Ma, ~. 1700. Ma and 600-500. Ma. However, the zircon age spectrum of one sample from the west side of the Uplift is distinct with a main peak at 880. Ma and lacking grains younger than 650. Ma. Combined geochronological and paleocurrent data suggest that detritus within the syn-orogenic basins was derived from the northern segment of East Gondwana but with additional input of detritus from the Jiangnan Uplift by the late Early Silurian. This information together with analysis of time equivalent strata along strike to the northeast suggests that the Jiangnan Uplift was not a continuous barrier to sediment transport from the southeast but represented part of a discontinuous series of islands supplying local detritus that was mixed with sediment transported from northern Gondwana.
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Details

Original languageEnglish
Pages (from-to)769-780
JournalGondwana Research
Volume28
Issue number2
Early online date28 Aug 2014
DOIs
Publication statusPublished - Sep 2015

    Research areas

  • Detrital zircon, Chronology, Syn-orogenic basin, South China

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ID: 157758558