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Petrology and geochemistry of dunites, chromitites and mineral inclusions from the Gaositai Alaskan-type complex, North China Craton: Implications for mantle source characteristics

文献类型：期刊论文

作者Tian, W.1; Chen, B.1,2; Ireland, T. R.3; Green, D. H.4; Suzuki, K.5; Chu, Z.6
刊名LITHOS
出版日期2011-11-01
卷号127期号:1-2页码:165-175
关键词Clinopyroxene inclusions Trace elements Re-Os isotopes Chromite Dunite North China craton
ISSN号0024-4937
DOI10.1016/j.lithos.2011.08.013
文献子类Article
英文摘要The Gaositai complex is a typical Alaskan-type intrusion, emplaced in the northern margin of the North China Craton at about 280 Ma. It is a concentrically zoned intrusion, with dunite in the core, rimmed by wehrlite, clinopyroxenite and hornblendite outwards. To understand the chemical compositions of the parent magma to the ultramafic complex, and thus that of the mantle source, we conduct petrological and geochemical studies on the dunite core and high-Mg clinopyroxene (cpx) inclusions in the chromitite from the rock unit, including the major and trace elements of cpx inclusions and whole-rock Re-Os isotope of the chromitites and chromite-rich dunites. The cpx inclusions have chemical compositions similar to the high Mg# cpx of primitive ankaramite, suggesting that the cpx inclusions could have formed from a primitive parent magma. The calculated chemical compositions of the primitive parent magma are characterized by high Mg# and CaO, with CaO/Al2O3 ratios >1, and enriched in Sr and other large ion lithophile elements compared to high field strength and rare earth elements. This, together with the high fO(2) (up to FMQ + 2.83) of chromitite, suggests that the parent magma was a typical arc ankaramite (wet and CaO-rich picrite), originated probably from a hydrous-carbonatite fluxed sub-continental lithospheric mantle above a subduction zone that formed as a result of the subduction of the paleo-Asian oceanic slab beneath the north China craton in late Paleozoic. (C) 2011 Elsevier B.V. All rights reserved.
WOS关键词SPINEL OXYGEN GEOBAROMETER ; ISLAND-ARC ANKARAMITES ; ASIAN OROGENIC BELT ; CHROMIAN SPINEL ; MELT INCLUSIONS ; EXPERIMENTAL CALIBRATION ; PETROGENETIC INDICATOR ; TECTONIC IMPLICATIONS ; LITHOSPHERIC MANTLE ; ISOTOPE SYSTEMATICS
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000298070600011
出版者ELSEVIER SCIENCE BV
资助机构Natural Science Foundation of China (NSFC)(90914001 ; Natural Science Foundation of China (NSFC)(90914001 ; NSFC(40502009 ; NSFC(40502009 ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; 40625005 ; 40625005 ; 41072040) ; 41072040) ; 40821002) ; 40821002) ; Natural Science Foundation of China (NSFC)(90914001 ; Natural Science Foundation of China (NSFC)(90914001 ; NSFC(40502009 ; NSFC(40502009 ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; 40625005 ; 40625005 ; 41072040) ; 41072040) ; 40821002) ; 40821002) ; Natural Science Foundation of China (NSFC)(90914001 ; Natural Science Foundation of China (NSFC)(90914001 ; NSFC(40502009 ; NSFC(40502009 ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; 40625005 ; 40625005 ; 41072040) ; 41072040) ; 40821002) ; 40821002) ; Natural Science Foundation of China (NSFC)(90914001 ; Natural Science Foundation of China (NSFC)(90914001 ; NSFC(40502009 ; NSFC(40502009 ; Japan Society for the Promotion of Science ; Japan Society for the Promotion of Science ; 40625005 ; 40625005 ; 41072040) ; 41072040) ; 40821002) ; 40821002)
源URL[http://ir.iggcas.ac.cn/handle/132A11/74842]  
专题中国科学院地质与地球物理研究所
通讯作者Chen, B.
作者单位1.Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut MOE, Beijing 100871, Peoples R China
2.Xinjiang Univ, Inst Geol & Explorat Engn, Urumqi 830046, Peoples R China
3.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia
4.Univ Tasmania, CODES, Hobart, Tas 7001, Australia
5.JAMSTEC, Inst Res Earth Evolut IFREE, Yokosuka, Kanagawa 2370061, Japan
6.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Tian, W.,Chen, B.,Ireland, T. R.,et al. Petrology and geochemistry of dunites, chromitites and mineral inclusions from the Gaositai Alaskan-type complex, North China Craton: Implications for mantle source characteristics[J]. LITHOS,2011,127(1-2):165-175.
APA Tian, W.,Chen, B.,Ireland, T. R.,Green, D. H.,Suzuki, K.,&Chu, Z..(2011).Petrology and geochemistry of dunites, chromitites and mineral inclusions from the Gaositai Alaskan-type complex, North China Craton: Implications for mantle source characteristics.LITHOS,127(1-2),165-175.
MLA Tian, W.,et al."Petrology and geochemistry of dunites, chromitites and mineral inclusions from the Gaositai Alaskan-type complex, North China Craton: Implications for mantle source characteristics".LITHOS 127.1-2(2011):165-175.

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来源：地质与地球物理研究所

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