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Geochemistry of hornblende gabbros from Sonidzuoqi, Inner Mongolia, North China: implications for magmatism during the final stage of suprasubduction-zone ophiolite formation

文献类型：期刊论文

作者Zhang, Xiaohui1; Wilde, Simon A.2; Zhang, Hongfu1; Tang, Yanjie1; Zhai, Mingguo1
刊名INTERNATIONAL GEOLOGY REVIEW
出版日期2009
卷号51期号:4页码:345-373
关键词hornblende gabbro geochemistry petrogenesis suprasubduction zone ophiolite Central Asian Orogenic Belt
ISSN号0020-6814
DOI10.1080/00206810802712103
文献子类Article
英文摘要Allochthonous hornblende-rich gabbroic rocks at Sonidzuoqi constitute important components of the early to middle Palaeozoic orogen, which forms the southeastern part of the Central Asian orogenic belt in Inner Mongolia. Limited hornblende K-Ar and SHRIMP U-Pb zircon ages document the Late Silurian to Early Devonian gabbroic emplacement. The rocks are tholeiitic and are characterized by moderate large-ion-lithophile-element (e.g. Th, U) abundances, high-field-strength-element (e.g. Nb, Ta, Zr, Ti) depletions, high Ti/V ratios, and MORB-like isotopic signatures [(87Sr/86Sr)i0.7030 to 0.7042; Nd(t)+4.35 to +7.80, (206Pb/204Pb)i17.46 to 17.61]. These features argue for a hydrous basaltic parental magma. We postulate that the melt formed through the coupling of MORB-type mantle upwelling with aqueous fluid influx derived from slab devolatilization. This petrogenetic scenario suggests that an active spreading centre entered the trench during ridge subduction, bringing to a close an episode of suprasubduction-zone ophiolite formation. The Siluro-Devonian hornblende gabbros, together with a pre-490 Ma ophiolitic melange of MORB-OIB affinity, 483-471 Ma arc intrusions, 498-461 Ma trondhjemite-tonalite-granodiorite plutons, and 427-423 Ma calc-alkaline granites from the same area, provide documentation of multistage crustal generation processes during the life cycle of this suprasubduction-zone ophiolite.
WOS关键词BETTS COVE OPHIOLITE ; ASIAN OROGENIC BELT ; ISLAND-ARC ; PETROGENETIC IMPLICATIONS ; TECTONIC IMPLICATIONS ; ELEMENT GEOCHEMISTRY ; NORTHEASTERN CHINA ; VOLCANIC-ROCKS ; U-PB ; MANTLE
WOS研究方向Geology
语种英语
WOS记录号WOS:000264824600004
出版者TAYLOR & FRANCIS INC
资助机构Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Chinese Academy of Sciences(KZCX2YW-103) ; Chinese Academy of Sciences(KZCX2YW-103) ; Chinese Academy of Sciences(KZCX2YW-103) ; Chinese Academy of Sciences(KZCX2YW-103) ; National Natural Science Foundation of China(40534022 ; National Natural Science Foundation of China(40534022 ; National Natural Science Foundation of China(40534022 ; National Natural Science Foundation of China(40534022 ; 40873026) ; 40873026) ; 40873026) ; 40873026) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Chinese Academy of Sciences(KZCX2YW-103) ; Chinese Academy of Sciences(KZCX2YW-103) ; Chinese Academy of Sciences(KZCX2YW-103) ; Chinese Academy of Sciences(KZCX2YW-103) ; National Natural Science Foundation of China(40534022 ; National Natural Science Foundation of China(40534022 ; National Natural Science Foundation of China(40534022 ; National Natural Science Foundation of China(40534022 ; 40873026) ; 40873026) ; 40873026) ; 40873026) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Chinese Academy of Sciences(KZCX2YW-103) ; Chinese Academy of Sciences(KZCX2YW-103) ; Chinese Academy of Sciences(KZCX2YW-103) ; Chinese Academy of Sciences(KZCX2YW-103) ; National Natural Science Foundation of China(40534022 ; National Natural Science Foundation of China(40534022 ; National Natural Science Foundation of China(40534022 ; National Natural Science Foundation of China(40534022 ; 40873026) ; 40873026) ; 40873026) ; 40873026) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Major State Basic Research Programme of the People's Republic of China(2006CB403504) ; Chinese Academy of Sciences(KZCX2YW-103) ; Chinese Academy of Sciences(KZCX2YW-103) ; Chinese Academy of Sciences(KZCX2YW-103) ; Chinese Academy of Sciences(KZCX2YW-103) ; National Natural Science Foundation of China(40534022 ; National Natural Science Foundation of China(40534022 ; National Natural Science Foundation of China(40534022 ; National Natural Science Foundation of China(40534022 ; 40873026) ; 40873026) ; 40873026) ; 40873026)
源URL[http://ir.iggcas.ac.cn/handle/132A11/70732]  
专题中国科学院地质与地球物理研究所
通讯作者Zhang, Xiaohui
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Curtin Univ Technol, Dept Appl Geol, Perth, WA 6845, Australia
推荐引用方式
GB/T 7714		 Zhang, Xiaohui,Wilde, Simon A.,Zhang, Hongfu,et al. Geochemistry of hornblende gabbros from Sonidzuoqi, Inner Mongolia, North China: implications for magmatism during the final stage of suprasubduction-zone ophiolite formation[J]. INTERNATIONAL GEOLOGY REVIEW,2009,51(4):345-373.
APA Zhang, Xiaohui,Wilde, Simon A.,Zhang, Hongfu,Tang, Yanjie,&Zhai, Mingguo.(2009).Geochemistry of hornblende gabbros from Sonidzuoqi, Inner Mongolia, North China: implications for magmatism during the final stage of suprasubduction-zone ophiolite formation.INTERNATIONAL GEOLOGY REVIEW,51(4),345-373.
MLA Zhang, Xiaohui,et al."Geochemistry of hornblende gabbros from Sonidzuoqi, Inner Mongolia, North China: implications for magmatism during the final stage of suprasubduction-zone ophiolite formation".INTERNATIONAL GEOLOGY REVIEW 51.4(2009):345-373.

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来源：地质与地球物理研究所

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