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The formation of a magmatic Cu- Ni sulfide deposit in mafic intrusions at the Kalatongke, NW China: Insights from amphibole mineralogy and composition
Kang, Zhen1,2,3; Qin, Ke-Zhang1,2,3; Mao, Ya-Jing1,2; Tang, Dong-Mei1,2; Yao, Zhuo-Sen1,2
2020
Source PublicationLITHOS
ISSN0024-4937
Volume352Pages:14
AbstractThe early Permian Kalatongke Cu-Ni sulfide deposit in the Central Asian Orogenic Belt (CAOB) is the most important Cu-Ni deposit in northern Xinjiang, NW China. It is hosted mainly by mafic intrusions, which is in contrast to deposits in the Eastern Tianshan area of eastern Xinjiang that are hosted mainly by ultramafic intrusions. The controls on sulfide mineralization in the Kalatongke mafic intrusions are poorly constrained relative to the ultramafic intrusions. Here we use amphibole compositions to trace the nature, oxygen fugacity, and water content of the Kalatongke magmas. The results, together with data for other Ni-Cu mineralized magmas in Eastern Tianshan, are used to clarify the formation mechanism of sulfide mineralization in mafic intrusions. Amphiboles in the Kalatongke intrusions are divided into three types based on petrographic features: poikilitic amphiboles in olivine norite and norite (Type 1), which formed by reactions between olivine and pyroxene and interstitial residual melt; zoned amphiboles in norite (Type 2), generated by contamination processes; and needle-shaped amphiboles in diorite (Type 3), which indicate rapid cooling during the early stage of magma evolution. Modeled results show that the melts in equilibrium with amphiboles and clinopyroxenes exhibit enrichment in Th, U, and light rare earth elements (LREE) over heavy REE (HREE). Combined with amphibole and clinopyroxene chemistry, this indicates that the parental magma of the Kalatongke intrusions was strongly contaminated by continental crust during ascent. The oxygen fugacity of the magma during fractionation was evaluated using amphibole chemistry and olivine-sulfide equilibration. The oxygen fugacity of the magmas varied during their evolution, with the Kalatongke deposit magma showing relatively little variation compared with the deposits related to ultramafic intrusions in Eastern Tianshan. The oxygen fugacity of ore-forming magma thus varied significantly during the early stages of magma emplacement. Moreover, the calculated water content of melts in equilibrium with Kalatongke amphibole and clinopyroxenes averages 4.37 wt% in. These lines of evidence indicate that a highly hydrous and relatively oxidized magma favors the formation of sulfide deposits in mafic intrusions. It is inferred that sulfide saturation was delayed to the onset of mafic magma crystallization, rather than trapped in the early crystallized olivine cumulate within the staging magma chamber. (C) 2019 Published by Elsevier B.V.
KeywordAmphibole Kalatongke Cu-Ni sulfide deposit Mafic intrusion Oxygen fugacity Water content
DOI10.1016/j.lithos.2019.105317
Funding OrganizationNational Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordASIAN OROGENIC BELT ; U-PB AGE ; ULTRAMAFIC INTRUSION ; FRACTIONAL CRYSTALLIZATION ; TECTONIC EVOLUTION ; NORTHWEST CHINA ; VICTORIA LAND ; WATER-CONTENT ; ISLAND-ARC ; GEOCHEMISTRY
Language英语
Funding ProjectNational Key Research & Development Program of China[2017YFC0601204] ; National Natural Science Foundation of China[41830430] ; National Natural Science Foundation of China[41872904] ; National Natural Science Foundation of China[41472075]
Funding OrganizationNational Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Key Research & Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000515201500010
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95599
Collection矿产资源研究院重点实验室
Corresponding AuthorQin, Ke-Zhang
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Kang, Zhen,Qin, Ke-Zhang,Mao, Ya-Jing,et al. The formation of a magmatic Cu- Ni sulfide deposit in mafic intrusions at the Kalatongke, NW China: Insights from amphibole mineralogy and composition[J]. LITHOS,2020,352:14.
APA Kang, Zhen,Qin, Ke-Zhang,Mao, Ya-Jing,Tang, Dong-Mei,&Yao, Zhuo-Sen.(2020).The formation of a magmatic Cu- Ni sulfide deposit in mafic intrusions at the Kalatongke, NW China: Insights from amphibole mineralogy and composition.LITHOS,352,14.
MLA Kang, Zhen,et al."The formation of a magmatic Cu- Ni sulfide deposit in mafic intrusions at the Kalatongke, NW China: Insights from amphibole mineralogy and composition".LITHOS 352(2020):14.
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