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Article: Late Carboniferous high-Mg dioritic dikes in Western Junggar, NW China: Geochemical features, petrogenesis and tectonic implications

TitleLate Carboniferous high-Mg dioritic dikes in Western Junggar, NW China: Geochemical features, petrogenesis and tectonic implications
Authors
KeywordsCu-Au mineralization
Dike
Junggar
Ridge subduction
Sanukitoid
Issue Date2010
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jcr
Citation
Gondwana Research, 2010, v. 17 n. 1, p. 145-152 How to Cite?
AbstractLate Paleozoic High-Mg dioritic dikes widely occur in western Junggar, NW China. Ar-Ar dating on rock chips of the dikes has yielded a plateau age of 321 ± 3 Ma, indicating an early Carboniferous age for the dikes. The dikes are enriched in SiO2 (52-57 wt.%), and characterized by high MgO (5.13-7.41 wt.%), Cr (134-204 ppm), Ni (59-141 ppm), Sr (468-724 ppm) and Ba (316-676 ppm) contents, with geochemical features analogous to those of sanukite of Setouchi volcanic belt, Japan. These dikes contain hornblende and biotite and generally have high Ba/La (27-124) and La/Nb (2.9-4.3) ratios and positive Eu anomalies, consistent with an origin from hydrous partial melting of a mantle source metasomatised by slab-derived component. The occurrence of sanukitic dikes, together with the coeval slab-related adakite in the area, implies that the western Junggar had been affected by hot, subduction-related regime, which gave rise to not only massive magmatism in the late Carboniferous, but also intensive Cu-Au mineralization in the area. © 2009 International Association for Gondwana Research.
Persistent Identifierhttp://hdl.handle.net/10722/123895
ISSN
2015 Impact Factor: 8.743
2015 SCImago Journal Rankings: 4.949
ISI Accession Number ID
Funding AgencyGrant Number
National Basic Research Program of China2007CB411308
NSFC40721063
40421303
40772130
Hong Kong RGCHKU 7043079
HKU CRCG
CAS/SAFEA International Partnership Program for Creative Research Teams
Funding Information:

We thank Zhang Qi and Wang Qiang for their constructive suggestions. We are grateful to two anonymous reviewers whose critical reviews are very helpful in improving the manuscript. This research was jointly supported by research grants from the National Basic Research Program of China (973 Program) 2007CB411308, NSFC Projects 40721063, 40421303, 40772130, Hong Kong RGC (HKU 7043079), HKU CRCG and the CAS/SAFEA International Partnership Program for Creative Research Teams.

References

 

DC FieldValueLanguage
dc.contributor.authorYin, Jen_HK
dc.contributor.authorYuan, Cen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorLong, Xen_HK
dc.contributor.authorZhao, Gen_HK
dc.contributor.authorWong, KPen_HK
dc.contributor.authorGeng, Hen_HK
dc.contributor.authorCai, Ken_HK
dc.date.accessioned2010-10-07T01:55:58Z-
dc.date.available2010-10-07T01:55:58Z-
dc.date.issued2010en_HK
dc.identifier.citationGondwana Research, 2010, v. 17 n. 1, p. 145-152en_HK
dc.identifier.issn1342-937Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/123895-
dc.description.abstractLate Paleozoic High-Mg dioritic dikes widely occur in western Junggar, NW China. Ar-Ar dating on rock chips of the dikes has yielded a plateau age of 321 ± 3 Ma, indicating an early Carboniferous age for the dikes. The dikes are enriched in SiO2 (52-57 wt.%), and characterized by high MgO (5.13-7.41 wt.%), Cr (134-204 ppm), Ni (59-141 ppm), Sr (468-724 ppm) and Ba (316-676 ppm) contents, with geochemical features analogous to those of sanukite of Setouchi volcanic belt, Japan. These dikes contain hornblende and biotite and generally have high Ba/La (27-124) and La/Nb (2.9-4.3) ratios and positive Eu anomalies, consistent with an origin from hydrous partial melting of a mantle source metasomatised by slab-derived component. The occurrence of sanukitic dikes, together with the coeval slab-related adakite in the area, implies that the western Junggar had been affected by hot, subduction-related regime, which gave rise to not only massive magmatism in the late Carboniferous, but also intensive Cu-Au mineralization in the area. © 2009 International Association for Gondwana Research.en_HK
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jcren_HK
dc.relation.ispartofGondwana Researchen_HK
dc.rightsGondwana Research. Copyright © Elsevier BV.-
dc.subjectCu-Au mineralizationen_HK
dc.subjectDikeen_HK
dc.subjectJunggaren_HK
dc.subjectRidge subductionen_HK
dc.subjectSanukitoiden_HK
dc.titleLate Carboniferous high-Mg dioritic dikes in Western Junggar, NW China: Geochemical features, petrogenesis and tectonic implicationsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1342-937X&volume=17&issue=1&spage=145&epage=152&date=2010&atitle=Late+Carboniferous+high-Mg+dioritic+dikes+in+Western+Junggar,+NW+China:+geochemical+features,+petrogenesis+and+tectonic+implications-
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.2009.05.011en_HK
dc.identifier.scopuseid_2-s2.0-70449083287en_HK
dc.identifier.hkuros175413-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-70449083287&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume17en_HK
dc.identifier.issue1en_HK
dc.identifier.spage145en_HK
dc.identifier.epage152en_HK
dc.identifier.isiWOS:000273930100012-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridYin, J=35212658500en_HK
dc.identifier.scopusauthoridYuan, C=35241599200en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridLong, X=14012199100en_HK
dc.identifier.scopusauthoridZhao, G=7403296321en_HK
dc.identifier.scopusauthoridWong, KP=34769228100en_HK
dc.identifier.scopusauthoridGeng, H=26644953700en_HK
dc.identifier.scopusauthoridCai, K=14011943800en_HK

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