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Article: A-type granite belts of two chemical subgroups in central eastern China: Indication of ridge subduction
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TitleA-type granite belts of two chemical subgroups in central eastern China: Indication of ridge subduction
 
AuthorsLi, H4 1
Ling, Mx4
Li, Cy4 1
Zhang, H4 4
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
2012 Impact Factor: 3.779
2012 SCImago Journal Rankings: 2.037
 
DOIhttp://dx.doi.org/10.1016/j.lithos.2011.09.021
 
DC FieldValue
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
2012 Impact Factor: 3.779
2012 SCImago Journal Rankings: 2.037
 
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
 
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<item><contributor.author>Li, H</contributor.author>
<contributor.author>Ling, Mx</contributor.author>
<contributor.author>Li, Cy</contributor.author>
<contributor.author>Zhang, H</contributor.author>
<contributor.author>Ding, X</contributor.author>
<contributor.author>Yang, Xy</contributor.author>
<contributor.author>Fan, Wm</contributor.author>
<contributor.author>Li, Yl</contributor.author>
<contributor.author>Sun, Wd</contributor.author>
<date.accessioned>2012-06-26T06:20:49Z</date.accessioned>
<date.available>2012-06-26T06:20:49Z</date.available>
<date.issued>2012</date.issued>
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<description.abstract>Early 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 &#177; 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. &#169; 2011 Elsevier B.V. All rights reserved.</description.abstract>
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<subject>A-Type Granite</subject>
<subject>Adakite</subject>
<subject>Lower Yangtze River Belt</subject>
<subject>Mantle Metasomatism</subject>
<subject>Ridge Subduction</subject>
<subject>Slab Window</subject>
<title>A-type granite belts of two chemical subgroups in central eastern China: Indication of ridge subduction</title>
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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