File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: The ∼390 Ma high-T metamorphic event in the Chinese Altai: A consequence of ridge-subduction?

TitleThe ∼390 Ma high-T metamorphic event in the Chinese Altai: A consequence of ridge-subduction?
Authors
KeywordsChinese Altai
Devonian
High-T metamorphism
Ridge-subduction
Issue Date2010
PublisherAmerican Journal of Science. The Journal's web site is located at http://www.ajsonline.org
Citation
American Journal Of Science, 2010, v. 310 n. 10, p. 1421-1452 How to Cite?
Abstract
High-grade rocks occur in the Chinese Altai, but the timing of metamorphism is poorly constrained, which hinders our understanding of the thermo-tectonic history of the region. Representative high-grade samples from the sillimanite zone extending from Hanas to Fuyun were selected for zircon U-Pb dating and temperature estimation. LA-ICP-MS analyses of zircon overgrowth rims and recrystallized domains give consistent ages of ∼390 Ma, which is interpreted to record a regional metamorphic event. Temperature (T) estimations using the amphibole-plagioclase-quartz (Amp-Pl-Qtz) and garnet-biotite (GB) geothermometers give relatively high temperatures ranging from 650 to 700 °C. The zircon metamorphic rims yield temperature estimates of ∼720 °C by using the Ti-in-zircon thermometer. These data suggest that a hightemperature metamorphic event took place in the Chinese Altai in the Middle Devonian, and may imply a tectonic environment involving an unusually elevated heat flux from a deep-seated source. Our data support possible ridge subduction around 390 Ma that caused upwelling of the hot asthenosphere and triggered the high-T metamorphism. This model can also account for coeval volcanic activity with a range of geochemical characteristics, diverse mafic intrusions and extensive hydrothermal mineralization in the Altai orogen.
Persistent Identifierhttp://hdl.handle.net/10722/139187
ISSN
2013 Impact Factor: 3.929
2013 SCImago Journal Rankings: 2.424
ISI Accession Number ID
Funding AgencyGrant Number
National Basic Research Program of China2007CB411308
Hong Kong Research Grants CouncilHKU7043/07P
HKU
Hong Kong-Germany Joint Research Scheme
CAS/SAFEA
Funding Information:

This study was supported by research grants from the National Basic Research Program of China (2007CB411308), Hong Kong Research Grants Council (HKU7043/07P), HKU research grants, Hong Kong-Germany Joint Research Scheme, and CAS/SAFEA International Partnership Program for Creative Research Teams. Xie Liewen and Yang Yueheng are thanked for laboratory assistance. We wish to also thank Kenny Wong, Geng Hongyan and Cai Keda for their great help during our field investigation. This study was inspired by Professor Alfred Kroner, and the authors are grateful for his continuous scientific encouragement and guidance. Dick Glen, Lifei Zhang and Simon Wilde (guest editor) are thanked for their comments and suggestions which significantly improved the manuscript.

References

 

Author Affiliations
  1. The University of Hong Kong
  2. Institute of Geology and Geophysics Chinese Academy of Sciences
  3. Guangzhou Institute of Geochemistry Chinese Academy of Sciences
DC FieldValueLanguage
dc.contributor.authorJiang, Yen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorZhao, Gen_HK
dc.contributor.authorYuan, Cen_HK
dc.contributor.authorXiao, Wen_HK
dc.contributor.authorXia, Xen_HK
dc.contributor.authorLong, Xen_HK
dc.contributor.authorWu, Fen_HK
dc.date.accessioned2011-09-23T05:46:28Z-
dc.date.available2011-09-23T05:46:28Z-
dc.date.issued2010en_HK
dc.identifier.citationAmerican Journal Of Science, 2010, v. 310 n. 10, p. 1421-1452en_HK
dc.identifier.issn0002-9599en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139187-
dc.description.abstractHigh-grade rocks occur in the Chinese Altai, but the timing of metamorphism is poorly constrained, which hinders our understanding of the thermo-tectonic history of the region. Representative high-grade samples from the sillimanite zone extending from Hanas to Fuyun were selected for zircon U-Pb dating and temperature estimation. LA-ICP-MS analyses of zircon overgrowth rims and recrystallized domains give consistent ages of ∼390 Ma, which is interpreted to record a regional metamorphic event. Temperature (T) estimations using the amphibole-plagioclase-quartz (Amp-Pl-Qtz) and garnet-biotite (GB) geothermometers give relatively high temperatures ranging from 650 to 700 °C. The zircon metamorphic rims yield temperature estimates of ∼720 °C by using the Ti-in-zircon thermometer. These data suggest that a hightemperature metamorphic event took place in the Chinese Altai in the Middle Devonian, and may imply a tectonic environment involving an unusually elevated heat flux from a deep-seated source. Our data support possible ridge subduction around 390 Ma that caused upwelling of the hot asthenosphere and triggered the high-T metamorphism. This model can also account for coeval volcanic activity with a range of geochemical characteristics, diverse mafic intrusions and extensive hydrothermal mineralization in the Altai orogen.en_HK
dc.languageengen_US
dc.publisherAmerican Journal of Science. The Journal's web site is located at http://www.ajsonline.orgen_HK
dc.relation.ispartofAmerican Journal of Scienceen_HK
dc.subjectChinese Altaien_HK
dc.subjectDevonianen_HK
dc.subjectHigh-T metamorphismen_HK
dc.subjectRidge-subductionen_HK
dc.titleThe ∼390 Ma high-T metamorphic event in the Chinese Altai: A consequence of ridge-subduction?en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0002-9599&volume=310&spage=1421&epage=1452&date=2010&atitle=The+390+Ma+high-T+metamorphism+in+the+Chinese+Altai:+consequence+of+ridge-subduction?en_US
dc.identifier.emailSun, M: minsun@hku.hken_HK
dc.identifier.emailZhao, G: gzhao@hkucc.hku.hken_HK
dc.identifier.emailXia, X: xpxia@hotmail.comen_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.identifier.authorityZhao, G=rp00842en_HK
dc.identifier.authorityXia, X=rp00815en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.2475/10.2010.08en_HK
dc.identifier.scopuseid_2-s2.0-79957447852en_HK
dc.identifier.hkuros193916en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79957447852&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume310en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1421en_HK
dc.identifier.epage1452en_HK
dc.identifier.isiWOS:000290550800009-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridJiang, Y=39861696800en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridZhao, G=7403296321en_HK
dc.identifier.scopusauthoridYuan, C=35241599200en_HK
dc.identifier.scopusauthoridXiao, W=7202456615en_HK
dc.identifier.scopusauthoridXia, X=35241486400en_HK
dc.identifier.scopusauthoridLong, X=14012199100en_HK
dc.identifier.scopusauthoridWu, F=40561925600en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats