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Article: Zircon U-Pb and Hf isotopic study of Mesozoic felsic rocks from eastern Zhejiang, South China: Geochemical contrast between the Yangtze and Cathaysia blocks

TitleZircon U-Pb and Hf isotopic study of Mesozoic felsic rocks from eastern Zhejiang, South China: Geochemical contrast between the Yangtze and Cathaysia blocks
Authors
KeywordsGranitoid
Mesozoic
South China
Zhejiang Province
Zircon Lu-Hf isotope
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jcr
Citation
Gondwana Research, 2011, v. 19 n. 1, p. 244-259 How to Cite?
Abstract
The Jiangshan-Shaoxing Fault Zone (JSFZ) in Zhejiang Province has been proposed to represent a suture between the Yangtze and Cathaysia blocks in South China. In this study, in-situ zircon U-Pb and Hf isotopic analysis and whole-rock major- and trace-element measurement of early to middle Cretaceous felsic rocks across the fault zone were conducted to constrain the nature of the fault zone. Twelve Cretaceous granitoid bodies were sampled from the NW and SE sides of the fault zone, respectively, with composition ranging from diorite to granite (SiO2=56.2-76.6wt.%). These granitoids yielded U-Pb ages ranging from 135-100Ma, with a systematic variation in zircon Hf isotopic compositions (εHf(t)=+6.9 to -7.0 in the NW side vs. +1.9 to -12.9 in the SE side). The TDM2 values for the granitoids from the NW side are 0.34 to 1.33Ga, with two peaks at ca. 876 and 1170Ma respectively, whereas those from the SE side are 0.70 to 1.62Ga, with a single peak at ca. 1126Ma. The Hf isotopic disparity for the two sides may indicate a fundamental difference in the lower crustal compositions of the Yangtze and Cathaysia blocks, supporting that the JSFZ is possibly a suture zone between the two blocks. Our results together with the available geological data suggest that the Mesoproterozoic materials are important for both the Yangtze and Cathaysia basement and the Neoproterozoic magmatic activities were important in the Yangtze Block, possibly related to the break-up of the Rodinia supercontinent, but less significant in the Cathaysia Block. This may imply that the two blocks have not completely juxtaposed in the Neoproterozoic. © 2010 International Association for Gondwana Research.
Persistent Identifierhttp://hdl.handle.net/10722/139182
ISSN
2013 Impact Factor: 8.122
2013 SCImago Journal Rankings: 3.898
ISI Accession Number ID
Funding AgencyGrant Number
Research Grant Council of Hong KongHKU 7041/05P
Chinese Ministry of Land and Resources200811015
Chemical Geodynamics Joint Laboratory
HKU
Guangzhou Institute of Geochemistry
Funding Information:

The authors appreciate the great efforts of Prof. M. Santosh, Dr. Wenjiao Xiao, Dr. Jianbo Zhou and an anonymous reviewer for their constructive reviews to improve the quality of this paper. We acknowledge Dr. George S.-K. Ma for the scientific discussion, Longming Li for field work, Xiao Fu, Lily Chiu, Liang Qi, Liewen Xie, Yueheng Yang, Xiaoping Xia and Jiangfeng Gao for laboratory assistance. This study was supported by research grants from the Research Grant Council of Hong Kong (HKU 7041/05P), the Chinese Ministry of Land and Resources (200811015), the Chemical Geodynamics Joint Laboratory between HKU and Guangzhou Institute of Geochemistry.

References
Grants

 

Author Affiliations
  1. Institute of Geology and Mineral Resources
  2. The University of Hong Kong
  3. Institute of Geology and Geophysics Chinese Academy of Sciences
  4. Guangzhou Institute of Geochemistry Chinese Academy of Sciences
DC FieldValueLanguage
dc.contributor.authorWong, Jen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorXing, Gen_HK
dc.contributor.authorLi, XHen_HK
dc.contributor.authorZhao, Gen_HK
dc.contributor.authorWong, Ken_HK
dc.contributor.authorWu, Fen_HK
dc.date.accessioned2011-09-23T05:46:24Z-
dc.date.available2011-09-23T05:46:24Z-
dc.date.issued2011en_HK
dc.identifier.citationGondwana Research, 2011, v. 19 n. 1, p. 244-259en_HK
dc.identifier.issn1342-937Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/139182-
dc.description.abstractThe Jiangshan-Shaoxing Fault Zone (JSFZ) in Zhejiang Province has been proposed to represent a suture between the Yangtze and Cathaysia blocks in South China. In this study, in-situ zircon U-Pb and Hf isotopic analysis and whole-rock major- and trace-element measurement of early to middle Cretaceous felsic rocks across the fault zone were conducted to constrain the nature of the fault zone. Twelve Cretaceous granitoid bodies were sampled from the NW and SE sides of the fault zone, respectively, with composition ranging from diorite to granite (SiO2=56.2-76.6wt.%). These granitoids yielded U-Pb ages ranging from 135-100Ma, with a systematic variation in zircon Hf isotopic compositions (εHf(t)=+6.9 to -7.0 in the NW side vs. +1.9 to -12.9 in the SE side). The TDM2 values for the granitoids from the NW side are 0.34 to 1.33Ga, with two peaks at ca. 876 and 1170Ma respectively, whereas those from the SE side are 0.70 to 1.62Ga, with a single peak at ca. 1126Ma. The Hf isotopic disparity for the two sides may indicate a fundamental difference in the lower crustal compositions of the Yangtze and Cathaysia blocks, supporting that the JSFZ is possibly a suture zone between the two blocks. Our results together with the available geological data suggest that the Mesoproterozoic materials are important for both the Yangtze and Cathaysia basement and the Neoproterozoic magmatic activities were important in the Yangtze Block, possibly related to the break-up of the Rodinia supercontinent, but less significant in the Cathaysia Block. This may imply that the two blocks have not completely juxtaposed in the Neoproterozoic. © 2010 International Association for Gondwana Research.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jcren_HK
dc.relation.ispartofGondwana Researchen_HK
dc.subjectGranitoiden_HK
dc.subjectMesozoicen_HK
dc.subjectSouth Chinaen_HK
dc.subjectZhejiang Provinceen_HK
dc.subjectZircon Lu-Hf isotopeen_HK
dc.titleZircon U-Pb and Hf isotopic study of Mesozoic felsic rocks from eastern Zhejiang, South China: Geochemical contrast between the Yangtze and Cathaysia blocksen_HK
dc.typeArticleen_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.emailZhao, G:gzhao@hkucc.hku.hken_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.identifier.authorityZhao, G=rp00842en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.gr.2010.06.004en_HK
dc.identifier.scopuseid_2-s2.0-78650717215en_HK
dc.identifier.hkuros193906en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-78650717215&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume19en_HK
dc.identifier.issue1en_HK
dc.identifier.spage244en_HK
dc.identifier.epage259en_HK
dc.identifier.isiWOS:000286960100019-
dc.publisher.placeNetherlandsen_HK
dc.relation.projectUsing U-Pb and Hf isotope compositions of inherited zircon cores from granitoids to constrain the suture between the Yangtze and Cathaysia Blocks-
dc.identifier.scopusauthoridWong, J=35207628900en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridXing, G=7103115605en_HK
dc.identifier.scopusauthoridLi, XH=35229968100en_HK
dc.identifier.scopusauthoridZhao, G=7403296321en_HK
dc.identifier.scopusauthoridWong, K=34769228100en_HK
dc.identifier.scopusauthoridWu, F=40561925600en_HK

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