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Article: A-type granite belts of two chemical subgroups in central eastern China: Indication of ridge subduction

TitleA-type granite belts of two chemical subgroups in central eastern China: Indication of ridge subduction
Authors
KeywordsA-Type Granite
Adakite
Lower Yangtze River Belt
Mantle Metasomatism
Ridge Subduction
Slab Window
Issue Date2012
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithos
Citation
Lithos, 2012, v. 150, p. 26-36 How to Cite?
AbstractEarly Cretaceous A-type granites in the Lower Yangtze River belt, central eastern China, with both A 1 and A 2 chemical subgroups, formed at 125 ± 2 Ma, after a Cretaceous ridge subduction. Remarkably, A 1 and A 2 group granites are distributed in three zones, roughly parallel to each other and to a slightly older adakite belt. In general, A 1 granites form in intraplate settings, whereas A 2 granites near paleo-convergent margins. The alternate distribution of these two subgroup A-type granites is compatible with a proposed Cretaceous ridge subduction in the region. The subduction of a dry and hot spreading ridge may have only released small amount of fluids, so that metasomatism on the overriding lithosphere was undetectable, correspondingly resulted in A 1 granites later on. In contrast, wetter and colder oceanic crust away from the spreading ridge was responsible for mantle metasomatism and consequently the formation of A 2 granites. Further away from the ridge, the subduction angle was much steeper, and dehydration of the slab had occurred earlier during the subduction, and thus dramatically reduced mantle metasomatism, corresponding to A 1 granites again. Both A 1 and A 2 granites formed within a short period of time due to slab window/rollback, after the ridge subduction. The distribution of the A 1 and A 2 granites together with the adakite belt may be taken as discrimination indice for ancient ridge subduction. © 2011 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/151337
ISSN
2014 Impact Factor: 4.482
2014 SCImago Journal Rankings: 2.461
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, Hen_US
dc.contributor.authorLing, Mxen_US
dc.contributor.authorLi, Cyen_US
dc.contributor.authorZhang, Hen_US
dc.contributor.authorDing, Xen_US
dc.contributor.authorYang, Xyen_US
dc.contributor.authorFan, Wmen_US
dc.contributor.authorLi, Ylen_US
dc.contributor.authorSun, Wden_US
dc.date.accessioned2012-06-26T06:20:49Z-
dc.date.available2012-06-26T06:20:49Z-
dc.date.issued2012en_US
dc.identifier.citationLithos, 2012, v. 150, p. 26-36en_US
dc.identifier.issn0024-4937en_US
dc.identifier.urihttp://hdl.handle.net/10722/151337-
dc.description.abstractEarly Cretaceous A-type granites in the Lower Yangtze River belt, central eastern China, with both A 1 and A 2 chemical subgroups, formed at 125 ± 2 Ma, after a Cretaceous ridge subduction. Remarkably, A 1 and A 2 group granites are distributed in three zones, roughly parallel to each other and to a slightly older adakite belt. In general, A 1 granites form in intraplate settings, whereas A 2 granites near paleo-convergent margins. The alternate distribution of these two subgroup A-type granites is compatible with a proposed Cretaceous ridge subduction in the region. The subduction of a dry and hot spreading ridge may have only released small amount of fluids, so that metasomatism on the overriding lithosphere was undetectable, correspondingly resulted in A 1 granites later on. In contrast, wetter and colder oceanic crust away from the spreading ridge was responsible for mantle metasomatism and consequently the formation of A 2 granites. Further away from the ridge, the subduction angle was much steeper, and dehydration of the slab had occurred earlier during the subduction, and thus dramatically reduced mantle metasomatism, corresponding to A 1 granites again. Both A 1 and A 2 granites formed within a short period of time due to slab window/rollback, after the ridge subduction. The distribution of the A 1 and A 2 granites together with the adakite belt may be taken as discrimination indice for ancient ridge subduction. © 2011 Elsevier B.V. All rights reserved.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithosen_US
dc.relation.ispartofLithosen_US
dc.subjectA-Type Graniteen_US
dc.subjectAdakiteen_US
dc.subjectLower Yangtze River Belten_US
dc.subjectMantle Metasomatismen_US
dc.subjectRidge Subductionen_US
dc.subjectSlab Windowen_US
dc.titleA-type granite belts of two chemical subgroups in central eastern China: Indication of ridge subductionen_US
dc.typeArticleen_US
dc.identifier.emailLi, Yl:yiliang@hkucc.hku.hken_US
dc.identifier.authorityLi, Yl=rp01354en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.lithos.2011.09.021en_US
dc.identifier.scopuseid_2-s2.0-84865767004en_US
dc.identifier.isiWOS:000309616000003-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridLi, H=53879885000en_US
dc.identifier.scopusauthoridLing, Mx=15753870500en_US
dc.identifier.scopusauthoridLi, Cy=51663907900en_US
dc.identifier.scopusauthoridZhang, H=53880815900en_US
dc.identifier.scopusauthoridDing, X=7401929562en_US
dc.identifier.scopusauthoridYang, Xy=7408599296en_US
dc.identifier.scopusauthoridFan, Wm=7401635313en_US
dc.identifier.scopusauthoridLi, Yl=27171876700en_US
dc.identifier.scopusauthoridSun, Wd=7404011201en_US
dc.identifier.citeulike9904969-

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