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Neoproterozoic ages of the Kuluketage diabase dyke swarm in Tarim, NW China, and its relationship to the breakup of Rodinia

Published online by Cambridge University Press:  27 November 2008

ZHIYONG ZHANG ,
WENBIN ZHU ,
LIANGSHU SHU ,
JINBAO SU  and
BIHAI ZHENG
ZHIYONG ZHANG
Affiliation:
State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, People's Republic of China
WENBIN ZHU*
Affiliation:
State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, People's Republic of China
LIANGSHU SHU
Affiliation:
State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, People's Republic of China
JINBAO SU
Affiliation:
State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, People's Republic of China
BIHAI ZHENG
Affiliation:
State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing 210093, People's Republic of China
*
*Author for correspondence: zwb@nju.edu.cn
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Abstract

The widely exposed Kuluketage diabase dyke swarm, Tarim Block, NW China, has been considered to have been emplaced in Permian times. New precise zircon U–Pb SHRIMP ages for two samples from the dyke swarm yield Neoproterozoic ages of 823.8±8.7 Ma and 776.8±8.9 Ma. Correlated with peaks of magmatism in South China and Australia at c. 825 Ma and c. 780 Ma, these two new ages provide significant information for palaeocontinental reconstructions. The prolonged duration of the magmatic events, combined with regional stratigraphic relationships, imply that the Tarim Block may have been affected by a mantle plume during the breakup of Rodinia.

Keywords

Tarimdyke swarmNeoproterozoicRodinia
Type
Rapid Communication
Information
Geological Magazine , Volume 146 , Issue 1 , January 2009 , pp. 150 - 154
Copyright
Copyright © Cambridge University Press 2008

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