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Tectonic affinity and reworking of the Archaean Jiaodong Terrane in the Eastern Block of the North China Craton: evidence from LA-ICP-MS U–Pb zircon ages

Published online by Cambridge University Press:  10 October 2013

MEILING WU
Affiliation:
Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong
GUOCHUN ZHAO*
Affiliation:
Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong
MIN SUN
Affiliation:
Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong
ZHIAN BAO
Affiliation:
State Key Laboratory of Continental Dynamics, Northwest University, Xi'an, 710068, China
PUI YUK TAM
Affiliation:
Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong
YANHONG HE
Affiliation:
State Key Laboratory of Continental Dynamics, Northwest University, Xi'an, 710068, China
*
Author for correspondence: [email protected]

Abstract

The Archaean Jiaodong Terrane is located in the southern segment of the Palaeoproterozoic Jiao-Liao-Ji Belt, which separates the Eastern Block of the North China Craton into the Longgang and Langrim blocks. Controversy has long surrounded the issue of whether the Jiaodong Terrane is part of the North China Craton or an exotic terrane. This study presents new zircon U–Pb ages for the major lithologies of the Jiaodong Terrane, and the results indicate that the terrane underwent two main magmatic events at ~2.89 Ga and 2.62–2.56 Ga and two metamorphic events at ~2.5 Ga and 1.9–1.8 Ga. These ages are consistent with those of other metamorphic complexes in the Eastern Block, suggesting that the Jiaodong Terrane was part of the Neoarchaean basement of the Eastern Block, which was reworked at 1.9–1.8 Ga in association with the development of the Palaeoproterozoic Jiao-Liao-Ji Belt.

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Rapid Communication
Copyright
Copyright © Cambridge University Press 2013 

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