Neoproterozoic Arc - related mafic intrusions along the Northern Margin of South China: implications for accretion of Rodinia
|dc.identifier.citation||Zhou, Mei-fu and Kennedy, Allen and Sun, Min and Malpas, John and Lescher, Chris. 2002. Neoproterozoic Arc - related mafic intrusions along the Northern Margin of South China: implications for accretion of Rodinia. Journal of Geology. 110 (5): pp. 611-618.|
South China has been considered as part of the Rodinian supercontinent during Neoproterozoic time, although itspaleogeographic position within this supercontinent is still a matter of debate. The Wangjiangshan and Bijigou complexesalong the northern margin of South China are among the largest mafic intrusions in China. New SHRIMPzircon U-Pb results indicate that these two intrusions have crystallization ages of 820 Ma and 780 Ma, respectively.Enrichment of large ion lithophile and light rare earth elements and depletion of high field-strength elements in theseintrusions suggest derivation from an active arc along a continental margin. This interpretation of these intrusionsas part of a continental arc assemblage is in contrast with the previous view that they were products of a Neoproterozoicmantle plume that initiated the breakup of Rodinia. The presence of a Neoproterozoic magmatic arc suggests thatRodinian oceanic lithosphere was subducted beneath the (present) northern margin of South China and therefore thatSouth China flanked the Rodinian ocean.
|dc.publisher||University of Chicago Press|
|dc.title||Neoproterozoic Arc - related mafic intrusions along the Northern Margin of South China: implications for accretion of Rodinia|
|dcterms.source.title||Journal of Geology|
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Copyright © 2002 University of Chicago Press. All rights reserved.
|curtin.faculty||Department of Medical Imaging and Applied Physics|
|curtin.faculty||School of Science|
|curtin.faculty||Science and Engineering|