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

File Download
  • No File Attached
Links for fulltext
(May Require Subscription)
Supplementary
  • Basic View
  • Metadata View
  • XML View
TitleA-type granite belts of two chemical subgroups in central eastern China: Indication of ridge subduction
AuthorsLi, H1 4
Ling, Mx4
Li, Cy1 4
Zhang, H4
Ding, X4
Yang, Xy3
Fan, Wm4
Li, Yl2
Sun, Wd4
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
CitationLithos, 2012, v. 150, p. 26-36 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.lithos.2011.09.021
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.
ISSN0024-4937
2011 Impact Factor: 3.246
2011 SCImago Journal Rankings: 0.112
DOIhttp://dx.doi.org/10.1016/j.lithos.2011.09.021
DC Field
Value
dc.contributor.authorLi, H
dc.contributor.authorLing, Mx
dc.contributor.authorLi, Cy
dc.contributor.authorZhang, H
dc.contributor.authorDing, X
dc.contributor.authorYang, Xy
dc.contributor.authorFan, Wm
dc.contributor.authorLi, Yl
dc.contributor.authorSun, Wd
dc.date.accessioned2012-06-26T06:20:49Z
dc.date.available2012-06-26T06:20:49Z
dc.date.issued2012
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.
dc.description.natureLink_to_subscribed_fulltext
dc.identifier.citationLithos, 2012, v. 150, p. 26-36 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.lithos.2011.09.021
dc.identifier.citeulike9904969
dc.identifier.doihttp://dx.doi.org/10.1016/j.lithos.2011.09.021
dc.identifier.issn0024-4937
2011 Impact Factor: 3.246
2011 SCImago Journal Rankings: 0.112
dc.identifier.scopuseid_2-s2.0-84865767004
dc.identifier.urihttp://hdl.handle.net/10722/151337
dc.languageeng
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/lithos
dc.publisher.placeNetherlands
dc.relation.ispartofLithos
dc.subjectA-Type Granite
dc.subjectAdakite
dc.subjectLower Yangtze River Belt
dc.subjectMantle Metasomatism
dc.subjectRidge Subduction
dc.subjectSlab Window
dc.titleA-type granite belts of two chemical subgroups in central eastern China: Indication of ridge subduction
dc.typeArticle
Author Affiliations
  1. Graduate University of Chinese Academy of Sciences
  2. The University of Hong Kong
  3. University of Science and Technology of China
  4. Guangzhou Institute of Geochemistry Chinese Academy of Sciences