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Role of asthenosphere and lithosphere in the genesis of the Early Permian Huangshan mafic–ultramafic intrusion in the Northern Tianshan, NW China
Yu-Feng Deng; Xie-Yan Song; Pete Hollings; Taofa Zhou; Feng Yuan; Lie-Meng Chen; Dayu Zhang
2015
发表期刊Lithos
卷号227页码:241-254
摘要

The Huangshan mafic–ultramafic intrusion hosts a large Ni–Cu sulfide deposit and is situated in the Northern Tianshan at the southern margin of the Central Asian Orogenic Belt (CAOB). The Early Permian intrusion consists of lherzolite, websterite, gabbronorite, gabbro and diorite. The Huangshan deposit contains ~ 80.4 Mt of ore grading 0.54 wt.% Ni and 0.3 wt.% Cu and is the second largest magmatic sulfide deposit in Northern Xinjiang, China. The Huangshan intrusive rocks are enriched in large ion lithophile elements and depleted in high field strength elements relative to N-MORB, with low Nb/U (1.53–5.27) and high Ba/Nb (1.68–121) ratios, indicating that the primary magma was derived from partial melting of a metasomatized mantle source. The mafic–ultramafic rocks in the Northern Tianshan are characterized by lower Ca contents (< 1000 ppm) in olivine, more depleted Nb and Ta, lower Nb/U ratios, and higher εΝd(t) than those of the Tarim mafic–ultramafic intrusive rocks and ocean island basalts (OIB). The range of εΝd(t) values of the mafic–ultramafic rocks in the Northern Tianshan over time suggests a greater role for upwelling asthenospheric mantle in the younger rocks. This implies that they were produced by interactions between metasomatized lithospheric mantle and depleted asthenospheric melts rather than a mantle plume. The linear distribution of Permian mafic–ultramafic intrusions along the Kangguer fault in the Northern Tianshan suggests that slab breakoff played a key role in the genesis of the mantle-derived magma in a syn-collisional setting.

关键词Huangshan Mafic–ultramafic Intrusion Tarim Mantle Plume Slab Break-off Metasomatized Mantle Asthenospheric Melts
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/9533
专题矿床地球化学国家重点实验室
作者单位1.School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
2.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
3.Department of Geology, Lakehead University, 955 Oliver Road, Thunder Bay, ON P7B 5E1, Canada
推荐引用方式
GB/T 7714
Yu-Feng Deng,Xie-Yan Song,Pete Hollings,等. Role of asthenosphere and lithosphere in the genesis of the Early Permian Huangshan mafic–ultramafic intrusion in the Northern Tianshan, NW China[J]. Lithos,2015,227:241-254.
APA Yu-Feng Deng.,Xie-Yan Song.,Pete Hollings.,Taofa Zhou.,Feng Yuan.,...&Dayu Zhang.(2015).Role of asthenosphere and lithosphere in the genesis of the Early Permian Huangshan mafic–ultramafic intrusion in the Northern Tianshan, NW China.Lithos,227,241-254.
MLA Yu-Feng Deng,et al."Role of asthenosphere and lithosphere in the genesis of the Early Permian Huangshan mafic–ultramafic intrusion in the Northern Tianshan, NW China".Lithos 227(2015):241-254.
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