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Discovery of Alaskan-style Tuerkubantao maficultramafic complex in NW-Junggar, NW China, and its significance
Qin, KZ (Qin KeZhang)1,2,3; Guo, ZL (Guo ZhengLin)1,4,5; Tang, DM (Tang DongMei)1,2; Li, JX (Li JinXiang)1,6; Guo, XJ (Guo XuJi)4; Dong, LH (Dong LianHui)1,7
Source PublicationACTA PETROLOGICA SINICA
2018
Volume34Issue:7Pages:1897-1913
AbstractNorthwestern margin of Junggar is located at the convergence of southwestern of Altai metallogenic belt and north of West Junggar, and in the binding district between Siberian plate and the Junggar plate, and is an important tectonic-magmatic-metallogenic province in northern Xinjiang. The Devonian Tuerkubantao mafic-ultramafic complex of Alaskan type was discovered in the Sawuer arc belt for the first time, accompanying by copper-nickel mineralization, which has significance on the prospecting of the regional and circum-Junggar arc belt. Tuerkubantao complex has the ring-shape characteristics, peridotite, gabbro, and hornblende gabbro occurs from inner to outer. Gabbro yields a zircon U-Pb concordia age of 394. 6 +/- 4. 9Ma, forming in the Early Devonian. Major and trace element characteristics indicate that the mafic-ultramafic complex was the product of differentiation of the same primary magma from the mantle source. High MgO and Cr abundance, Sr-Nd and Hf isotopic characteristics suggest that the magma source may be slightly depleted mantle, contaminated by the addition of subducted oceanic crust and by a small amount of crustal material in the process of ascend from mantle to upper crust. The rocks are characterized by enrichments in large-ion lithophile elements ( LILE: Rb, Ba, Sr) , more mobile highly incompatible lithophile elements (HILE) (U, Th) and relatively depletion in high field strength elements (HFSE : Nb, Ta, Zr, Hf, Ti, P) suggesting that the primary magma of Tuerkubantao mafic-ultramafic complex is arc magma in nature. However, it is significantly different from Xiangshan, Huangshan and Tulaergen magmatic Cu-Ni deposit in the eastern Tianshan, and Kalatongke in the eastern section of Irtysh metallogenic belt forming at the Early Permian post-orogenic extension setting, but is similar to Duke Island Complex hosting Cu-Ni mineralization in the southeastern Alaska. Based on these features, we confirm Tuerkubantao complex is the Alaskan-type formed in the arc setting. In addition, the inference supports previous view that the subduction of Junggar oceanic crust has been existed in the Sawuer region in the Early Devonian. This study has great significance for the regional Cu-Ni-PGE prospecting.
WOS IDWOS:000451724300005
Language英语
Indexed BySCIE
KeywordMAFIC-ULTRAMAFIC INTRUSION U-PB GEOCHRONOLOGY ASIAN OROGENIC BELT CU SULFIDE DEPOSIT SR-ND ISOTOPES WEST JUNGGAR GEOCHEMICAL CHARACTERISTICS TECTONIC EVOLUTION NORTHERN XINJIANG QINGHAI PROVINCE
WOS Research AreaGeology
WOS SubjectGeology
Cooperation Status国内
ISSN1000-0569
Department大陆碰撞与高原隆升重点实验室
PublisherSCIENCE PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8767
Collection图书馆
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China;
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China;
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
4.Xinjiang Geoexplorat Bur Nonferrous Met, Geol Party 706, Altay 839000, Peoples R China;
5.Xinjiang Xinhui Geoexplorat & Min Co Ltd, Urumqi 830000, Peoples R China;
6.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China;
7.Xinjiang Bur Geol & Mineral Resource, Urumqi 830000, Peoples R China.
Recommended Citation
GB/T 7714
Qin, KZ ,Guo, ZL ,Tang, DM ,et al. Discovery of Alaskan-style Tuerkubantao maficultramafic complex in NW-Junggar, NW China, and its significance[J]. ACTA PETROLOGICA SINICA,2018,34(7):1897-1913.
APA Qin, KZ ,Guo, ZL ,Tang, DM ,Li, JX ,Guo, XJ ,&Dong, LH .(2018).Discovery of Alaskan-style Tuerkubantao maficultramafic complex in NW-Junggar, NW China, and its significance.ACTA PETROLOGICA SINICA,34(7),1897-1913.
MLA Qin, KZ ,et al."Discovery of Alaskan-style Tuerkubantao maficultramafic complex in NW-Junggar, NW China, and its significance".ACTA PETROLOGICA SINICA 34.7(2018):1897-1913.
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