Title: The Late Proterozoic Continental Accretionary History of the Southeastern Margin of Jiangnania
Abstract: Abstract The newly obtained Sm‐Nd isochron ages are 1034 Ma and 935 Ma for ophiolites from northeastern Jiangxi and Fuchuan, southern Anhui respectively. There exist two unconformity surfaces under the initial Late Proterozoic volcanics as well as the Sinian rocks. The Xiuning intrusive body which was intruded into the Shangxi Group in southern Anhui yields a whole‐rock Rb‐Sr isochron age of 963 Ma. There occurs a belt of Late Proterozoic calc‐alkali volcanic rocks extending from northeastern Jiangxi to northwestern Zhejiang. In the light of the above facts, the authors consider that the southeastern margin of Jiangnania is an ancient island arc. At about 1000 Ma ago, the Huanan (South China) oceanic crust was subducted along the line linking Dexing and Hangzhou, thus starting the accretion of the island arc system to Jiangnania. At 800 Ma ago Cathaysia and Jiangnania converged together along the Jiangshan‐Shaoxing line, marking the end of the accretion.
Publication Year: 1992
Publication Date: 1992-09-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 21
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