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Article: Kinematics and age constraints of deformation in a Late Carboniferous accretionary complex in Western Junggar, NW China
Title | Kinematics and age constraints of deformation in a Late Carboniferous accretionary complex in Western Junggar, NW China | ||||||||
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Authors | |||||||||
Keywords | Accretionary complex Coheret unit Melange Southern Altaids West Junggar | ||||||||
Issue Date | 2011 | ||||||||
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jcr | ||||||||
Citation | Gondwana Research, 2011, v. 19 n. 4, p. 958-974 How to Cite? | ||||||||
Abstract | The Karamay area, situated in the eastern part of Western Junggar, Southern Altaids, contains an ophiolitic mélange with ultramafic rocks, gabbro, basalt, chert and limestone, which show typical block-in-matrix structures, and coherent turbidites and tuffs. These lithological associations are interpreted as incoherent and coherent series formed in an accretionary complex. On the basis of detailed field mapping and analyses of the asymmetry of imbricate thrusts, duplexes, tilted structures, shear band cleavages, and the NW-verging inclined to overturned folds, we conclude that the overall movement in the accretionary complex was top-to-the-NW. The youngest tuff involved in the deformation contains detrital zircons that have a U-Pb age (LA-MC ICP-MS) of 308±7Ma. 39Ar- 40Ar resistance furnace step-heating of amphibole separates from a diorite dike, which cuts the folded and imbricated rocks in the accretionary prism, yielded a plateau age of 307±2Ma. Consequently, the age of the deformation in the prism is tightly constrained at 307-308Ma, implying that the deformation occurred in an extremely short time-span during SE-ward subduction. Combined contemporaneous occurrence of Baogutu adakite, high-Mg, Sr-enriched and Y-poor dioritic dikes, Miaoergou charnockite, and Maliya mafic rocks, we further suggest the accretionary complex was cut by near-trench volcanic rocks and plutons possibly due to interaction with a spreading ridge. © 2010 International Association for Gondwana Research. | ||||||||
Persistent Identifier | http://hdl.handle.net/10722/139184 | ||||||||
ISSN | 2023 Impact Factor: 7.2 2023 SCImago Journal Rankings: 1.742 | ||||||||
ISI Accession Number ID |
Funding Information: We thank Jiliang Li, Jinyi Li, Yue Zhao, Lifei Zhang, Jinjiang Zhang, Zhaojie Guo, Baofu Han, Tianfeng Wan, Yadong Zheng and Fei Wang for useful discussions and suggestions on this manuscript. We acknowledge Drs. Liangjun Yu, Qigui Mao, and Peng Xu for field assistance and Liekun Yang for argon-argon analytic procedure. Brian F. Windley, Timothy M. Kusky and Cameron Quinn critically read earlier versions of the manuscript. We sincerely appreciate K. de Jong, an anonymous reviewer, and the editor for their critical and constructive comments. Funds from the Chinese State 973 Program (2007CB411307) the Innovative Program of the Chinese Academy of Sciences (KZCX2-YW-Q04-08), and the Natural Science Foundation of China Projects (40725009 and 40523003) are gratefully acknowledged. | ||||||||
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Zhang, J | en_HK |
dc.contributor.author | Xiao, W | en_HK |
dc.contributor.author | Han, C | en_HK |
dc.contributor.author | Ao, S | en_HK |
dc.contributor.author | Yuan, C | en_HK |
dc.contributor.author | Sun, M | en_HK |
dc.contributor.author | Geng, H | en_HK |
dc.contributor.author | Zhao, G | en_HK |
dc.contributor.author | Guo, Q | en_HK |
dc.contributor.author | Ma, C | en_HK |
dc.date.accessioned | 2011-09-23T05:46:25Z | - |
dc.date.available | 2011-09-23T05:46:25Z | - |
dc.date.issued | 2011 | en_HK |
dc.identifier.citation | Gondwana Research, 2011, v. 19 n. 4, p. 958-974 | en_HK |
dc.identifier.issn | 1342-937X | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/139184 | - |
dc.description.abstract | The Karamay area, situated in the eastern part of Western Junggar, Southern Altaids, contains an ophiolitic mélange with ultramafic rocks, gabbro, basalt, chert and limestone, which show typical block-in-matrix structures, and coherent turbidites and tuffs. These lithological associations are interpreted as incoherent and coherent series formed in an accretionary complex. On the basis of detailed field mapping and analyses of the asymmetry of imbricate thrusts, duplexes, tilted structures, shear band cleavages, and the NW-verging inclined to overturned folds, we conclude that the overall movement in the accretionary complex was top-to-the-NW. The youngest tuff involved in the deformation contains detrital zircons that have a U-Pb age (LA-MC ICP-MS) of 308±7Ma. 39Ar- 40Ar resistance furnace step-heating of amphibole separates from a diorite dike, which cuts the folded and imbricated rocks in the accretionary prism, yielded a plateau age of 307±2Ma. Consequently, the age of the deformation in the prism is tightly constrained at 307-308Ma, implying that the deformation occurred in an extremely short time-span during SE-ward subduction. Combined contemporaneous occurrence of Baogutu adakite, high-Mg, Sr-enriched and Y-poor dioritic dikes, Miaoergou charnockite, and Maliya mafic rocks, we further suggest the accretionary complex was cut by near-trench volcanic rocks and plutons possibly due to interaction with a spreading ridge. © 2010 International Association for Gondwana Research. | en_HK |
dc.language | eng | en_US |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jcr | en_HK |
dc.relation.ispartof | Gondwana Research | en_HK |
dc.subject | Accretionary complex | en_HK |
dc.subject | Coheret unit | en_HK |
dc.subject | Melange | en_HK |
dc.subject | Southern Altaids | en_HK |
dc.subject | West Junggar | en_HK |
dc.title | Kinematics and age constraints of deformation in a Late Carboniferous accretionary complex in Western Junggar, NW China | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1342-937X&volume=19&issue=4&spage=958&epage=974&date=2011&atitle=Kinematics+and+age+constraints+of+deformation+in+a+Late+Carboniferous+accretionary+complex+in+Western+Junggar,+NW+China | - |
dc.identifier.email | Sun, M:minsun@hku.hk | en_HK |
dc.identifier.email | Zhao, G:gzhao@hkucc.hku.hk | en_HK |
dc.identifier.authority | Sun, M=rp00780 | en_HK |
dc.identifier.authority | Zhao, G=rp00842 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.gr.2010.10.003 | en_HK |
dc.identifier.scopus | eid_2-s2.0-79954632194 | en_HK |
dc.identifier.hkuros | 193908 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-79954632194&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 19 | en_HK |
dc.identifier.issue | 4 | en_HK |
dc.identifier.spage | 958 | en_HK |
dc.identifier.epage | 974 | en_HK |
dc.identifier.isi | WOS:000290508400009 | - |
dc.publisher.place | Netherlands | en_HK |
dc.identifier.scopusauthorid | Zhang, J=7601357515 | en_HK |
dc.identifier.scopusauthorid | Xiao, W=7202456615 | en_HK |
dc.identifier.scopusauthorid | Han, C=35794513200 | en_HK |
dc.identifier.scopusauthorid | Ao, S=14010187500 | en_HK |
dc.identifier.scopusauthorid | Yuan, C=35241599200 | en_HK |
dc.identifier.scopusauthorid | Sun, M=25932315800 | en_HK |
dc.identifier.scopusauthorid | Geng, H=26644953700 | en_HK |
dc.identifier.scopusauthorid | Zhao, G=7403296321 | en_HK |
dc.identifier.scopusauthorid | Guo, Q=35304987200 | en_HK |
dc.identifier.scopusauthorid | Ma, C=49964226200 | en_HK |
dc.identifier.issnl | 1342-937X | - |