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Article: Late Mesozoic magmatism from the Daye region, eastern China: U-Pb ages, petrogenesis, and geodynamic implications

TitleLate Mesozoic magmatism from the Daye region, eastern China: U-Pb ages, petrogenesis, and geodynamic implications
Authors
KeywordsAdakite
Eastern China
Fractional crystallization
Lithospheric extension
Partial melting
Yangtze craton
Issue Date2009
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00410/index.htm
Citation
Contributions To Mineralogy And Petrology, 2009, v. 157 n. 3, p. 383-409 How to Cite?
AbstractLate Mesozoic dioritic and quartz dioritic plutons are widespread in the Daye region, eastern Yangtze craton, eastern China. Detailed geochronological, geochemical, and Sr-Nd isotopic studies have been undertaken for most of these plutons, in an attempt to provide a comprehensive understanding in the age, genesis and geodynamical control of the extensive magmatism. SHRIMP and LA-ICP-MS zircon U-Pb dating indicate that the plutons were emplaced in the range of latest Jurassic (ca. 152 Ma) to early Cretaceous (ca. 132 Ma), which was followed by dyke emplacement between 127 and 121 Ma and volcanism during the 130 - 113 Ma interval. Both diorites and quartz diorites are sodic, metaluminous, high-K calc-alkaline, and characterized by strongly fractionated, sub-parallel REE patterns without obvious Eu anomalies. The rocks are enriched in highly incompatible elements and large ion lithophile elements, but depleted in high field strength elements. Samples of diorite and quartz diorite have similar Sr-Nd isotopic compositions that are consistent with the early Cretaceous basalts and mafic intrusions throughout the eastern Yangtze craton. The geochemical and isotopic data, together with results of geochemical modeling, indicate an enriched mantle source for the plutonic rocks. The quartz diorites have geochemical signatures resembling adakites, such as high Al 2O 3 (15 - 19 wt.%), Sr (630 - 2,080 ppm), Na 2O (>3.5 wt.%), negative Nb-Ta anomalies, low Y (7 - 19 ppm), Yb (0.5 - 1.8 ppm), Sc (5 - 15 ppm), and resultant high Sr/Y (45 - 200) and La/Yb (31 - 63) ratios. Genesis of the adakitic quartz diorites is best explained in terms of low-pressure intracrustal fractional crystallization of cumulates consisting of hornblende, plagioclase, K-feldspar, magnetite, and apatite from mantle-derived dioritic magmas. Mantle-derived magmatism broadly coeval with that of the Daye region also is widespread in other regions of the eastern Yangtze craton, reflecting large-scale melting of the lithospheric mantle during the Late Mesozoic. The large-scale magmatism was most likely driven by lithospheric extension associated with thinning of lithospheric mantle beneath the eastern China continent. © Springer-Verlag 2008.
Persistent Identifierhttp://hdl.handle.net/10722/139151
ISSN
2015 Impact Factor: 3.218
2015 SCImago Journal Rankings: 2.582
ISI Accession Number ID
Funding AgencyGrant Number
Natural Science Foundation of China40334037
40521001
Chinese Ministry of Science and Technology2007DFA21230
Funding Information:

We acknowledge financial supports provided by Natural Science Foundation of China (grants 40334037 and 40521001), Chinese Ministry of Education (IRT0441), Chinese Ministry of Science and Technology (2007DFA21230), the 111 Project ( B07039), and the CRGC grants of the University of Hong Kong. Ms. Xiao Fu and Dr. Liang Qi are thanked for major and trace elemental analyses, respectively. Drs. Yan QR, Liu XM, and Chu ZY provided expert assistance in U - Pb dating and Sr - Nd isotope analysis, respectively. We thank Drs. Haibo Zou and Qiang Wang for their insights on an early draft of the paper. Constructive reviews by Wolfgang Siebel and Joerg Geldmacher have been of considerable importance in improving the paper, for which we are very grateful. Our thanks extend to Profs. Hans Keppler and Jochen Hoefs for useful editorial suggestions.

References

 

DC FieldValueLanguage
dc.contributor.authorLi, JWen_HK
dc.contributor.authorZhao, XFen_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorMa, CQen_HK
dc.contributor.authorSouza, ZSen_HK
dc.contributor.authorVasconcelos, Pen_HK
dc.date.accessioned2011-09-23T05:46:04Z-
dc.date.available2011-09-23T05:46:04Z-
dc.date.issued2009en_HK
dc.identifier.citationContributions To Mineralogy And Petrology, 2009, v. 157 n. 3, p. 383-409en_HK
dc.identifier.issn0010-7999en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139151-
dc.description.abstractLate Mesozoic dioritic and quartz dioritic plutons are widespread in the Daye region, eastern Yangtze craton, eastern China. Detailed geochronological, geochemical, and Sr-Nd isotopic studies have been undertaken for most of these plutons, in an attempt to provide a comprehensive understanding in the age, genesis and geodynamical control of the extensive magmatism. SHRIMP and LA-ICP-MS zircon U-Pb dating indicate that the plutons were emplaced in the range of latest Jurassic (ca. 152 Ma) to early Cretaceous (ca. 132 Ma), which was followed by dyke emplacement between 127 and 121 Ma and volcanism during the 130 - 113 Ma interval. Both diorites and quartz diorites are sodic, metaluminous, high-K calc-alkaline, and characterized by strongly fractionated, sub-parallel REE patterns without obvious Eu anomalies. The rocks are enriched in highly incompatible elements and large ion lithophile elements, but depleted in high field strength elements. Samples of diorite and quartz diorite have similar Sr-Nd isotopic compositions that are consistent with the early Cretaceous basalts and mafic intrusions throughout the eastern Yangtze craton. The geochemical and isotopic data, together with results of geochemical modeling, indicate an enriched mantle source for the plutonic rocks. The quartz diorites have geochemical signatures resembling adakites, such as high Al 2O 3 (15 - 19 wt.%), Sr (630 - 2,080 ppm), Na 2O (>3.5 wt.%), negative Nb-Ta anomalies, low Y (7 - 19 ppm), Yb (0.5 - 1.8 ppm), Sc (5 - 15 ppm), and resultant high Sr/Y (45 - 200) and La/Yb (31 - 63) ratios. Genesis of the adakitic quartz diorites is best explained in terms of low-pressure intracrustal fractional crystallization of cumulates consisting of hornblende, plagioclase, K-feldspar, magnetite, and apatite from mantle-derived dioritic magmas. Mantle-derived magmatism broadly coeval with that of the Daye region also is widespread in other regions of the eastern Yangtze craton, reflecting large-scale melting of the lithospheric mantle during the Late Mesozoic. The large-scale magmatism was most likely driven by lithospheric extension associated with thinning of lithospheric mantle beneath the eastern China continent. © Springer-Verlag 2008.en_HK
dc.languageengen_US
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00410/index.htmen_HK
dc.relation.ispartofContributions to Mineralogy and Petrologyen_HK
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjectAdakiteen_HK
dc.subjectEastern Chinaen_HK
dc.subjectFractional crystallizationen_HK
dc.subjectLithospheric extensionen_HK
dc.subjectPartial meltingen_HK
dc.subjectYangtze cratonen_HK
dc.titleLate Mesozoic magmatism from the Daye region, eastern China: U-Pb ages, petrogenesis, and geodynamic implicationsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0010-7999&volume=157&issue=3&spage=383&epage=409&date=2009&atitle=Late+Mesozoic+magmatism+from+the+Daye+region,+eastern+China:+U–Pb+ages,+petrogenesis,+and+geodynamic+implications-
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s00410-008-0341-xen_HK
dc.identifier.scopuseid_2-s2.0-58549120148en_HK
dc.identifier.hkuros192931en_US
dc.identifier.hkuros167324-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-58549120148&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume157en_HK
dc.identifier.issue3en_HK
dc.identifier.spage383en_HK
dc.identifier.epage409en_HK
dc.identifier.isiWOS:000262490800007-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridLi, JW=36063037900en_HK
dc.identifier.scopusauthoridZhao, XF=8942065800en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridMa, CQ=8142218900en_HK
dc.identifier.scopusauthoridSouza, ZS=6603234995en_HK
dc.identifier.scopusauthoridVasconcelos, P=7005771965en_HK
dc.identifier.citeulike3636145-

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