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Sulfide Ore Formation of the Kalatongke Ni-Cu Deposit as Illustrated by Sulfide Textures

文献类型：期刊论文

作者Mao, Ya-Jing2,3; Barnes, Stephen J.4; Godel, Belinda4; Schoneveld, Louise4; Qin, Ke-Zhang1,2,3; Tang, Dongmei2,3; Williams, Morgan4; Kang, Zhen1,2,3
刊名ECONOMIC GEOLOGY
出版日期2022-12-01
卷号117期号:8页码:1761-1778
ISSN号0361-0128
DOI10.5382/econgeo.4914
英文摘要The Kalatongke magmatic Ni-Cu deposit features high Ni-Cu grades compared with other Ni-Cu deposits in the Central Asian orogenic belt. The sulfides, mainly hosted by olivine norite and gabbronorite, are characterized by high Cu/Ni ratios. There is wide variety of textural relationships in the mineralized rocks, including globular, sulfide matrix, emulsion, disseminated, net-textured, and semimassive to massive textures. Quantitative textural measurements reveal that more than 65 vol % of the total sulfide volume in disseminated ore (defined as containing 4-10 vol % sulfide) and more than 90 vol % of the total sulfide volume in net-textured ore (typically 16 vol % sulfide) are hosted in few interconnected networks with equivalent sphere diameters (ESDs) larger than 6 mm. This illustrates that sulfide coalescence is a critical process. The remaining sulfide blebs define two groups of log-linear particle size distribution (PSD), i.e., a finer group (ESD of 0.080-<0.529 mm) and a coarser group (ESD of 0.529-4.084 mm). The PSD of the finer group differs slightly among different types of mineralization. The origin of this group of sulfides is attributed to sulfide nucleation simultaneously with crystallization of the olivine-orthopyroxene-plagioclase phases from the ore-forming magma in the current magma chamber. The PSD of the coarser group from net-textured ores is parallel to that from the disseminated ore but has lower intercept values. Modeling results show that aggregation of similar to 40-70% sulfide blebs of different grain size from the disseminated ore into the networks can generate the coarser group sulfide PSD of net-textured ore. In addition, monosulfide solution (MSS, pyrrhotite component)-enriched sulfide globules are commonly located close to sulfide matrix ore breccias and emulsion-textured ores, rimming the net-textured and massive orebodies. These globules are different from the sulfide component that was in equilibrium with the mafic magma, suggesting they were formed by mechanical remobilization of a cumulus MSS-enriched component from a previously segregated and partially crystallized sulfide pool. These observations, combined with the ubiquitous chilled margin xenoliths in the high-grade ores, suggest that the Kalatongke deposit was the result of voluminous magma flow through the current location accompanied by sulfide reworking and percolation. All these textural characteristics could be explained by emplacement within a laterally propagating bladed dike. Moreover, the deformation recorded in the emulsion-textured and massive ores suggests the fault system remains active during magma solidification, driving downward migration of sulfide from the sulfide pool at magmatic temperature to form vein-type massive ore. We suggest that the Kalatongke deposit formed by magma pulses injecting into the current location and that the tectonic movement remains active during the solidification of the intrusion. The syntectonic emplacement model, which may be a common feature in the Central Asian orogenic belt Ni-Cu deposits, indicates that the fault systems beneath the intrusion are of great exploration interest for high-grade ores.
WOS关键词MAFIC-ULTRAMAFIC INTRUSIONS ; CRYSTAL-SIZE DISTRIBUTIONS ; RAY COMPUTED-TOMOGRAPHY ; PLATINUM-GROUP ELEMENTS ; ALBANY-FRASER OROGEN ; NW CHINA ; MAGMATIC SULFIDE ; NORTHERN XINJIANG ; SOUTHERN ALTAI ; SILICATE TEXTURES
资助项目National Sci-ences Foundation of China ; National Key Research and Development Program of China ; (Youth Innovation Promotion Asso-ciation CAS) ; [42072105] ; [41872094] ; [41830430] ; [2017YFC0601204]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000887240800005
出版者SOC ECONOMIC GEOLOGISTS, INC
资助机构National Sci-ences Foundation of China ; National Sci-ences Foundation of China ; National Sci-ences Foundation of China ; National Sci-ences Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; (Youth Innovation Promotion Asso-ciation CAS) ; (Youth Innovation Promotion Asso-ciation CAS) ; (Youth Innovation Promotion Asso-ciation CAS) ; (Youth Innovation Promotion Asso-ciation CAS) ; National Sci-ences Foundation of China ; National Sci-ences Foundation of China ; National Sci-ences Foundation of China ; National Sci-ences Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; (Youth Innovation Promotion Asso-ciation CAS) ; (Youth Innovation Promotion Asso-ciation CAS) ; (Youth Innovation Promotion Asso-ciation CAS) ; (Youth Innovation Promotion Asso-ciation CAS) ; National Sci-ences Foundation of China ; National Sci-ences Foundation of China ; National Sci-ences Foundation of China ; National Sci-ences Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; (Youth Innovation Promotion Asso-ciation CAS) ; (Youth Innovation Promotion Asso-ciation CAS) ; (Youth Innovation Promotion Asso-ciation CAS) ; (Youth Innovation Promotion Asso-ciation CAS) ; National Sci-ences Foundation of China ; National Sci-ences Foundation of China ; National Sci-ences Foundation of China ; National Sci-ences Foundation of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; (Youth Innovation Promotion Asso-ciation CAS) ; (Youth Innovation Promotion Asso-ciation CAS) ; (Youth Innovation Promotion Asso-ciation CAS) ; (Youth Innovation Promotion Asso-ciation CAS)
源URL[http://ir.iggcas.ac.cn/handle/132A11/106984]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Mao, Ya-Jing
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
4.Commonwealth Sci & Ind Res Org CSIRO Mineral Resou, Perth 6151, Australia
推荐引用方式
GB/T 7714		 Mao, Ya-Jing,Barnes, Stephen J.,Godel, Belinda,et al. Sulfide Ore Formation of the Kalatongke Ni-Cu Deposit as Illustrated by Sulfide Textures[J]. ECONOMIC GEOLOGY,2022,117(8):1761-1778.
APA Mao, Ya-Jing.,Barnes, Stephen J..,Godel, Belinda.,Schoneveld, Louise.,Qin, Ke-Zhang.,...&Kang, Zhen.(2022).Sulfide Ore Formation of the Kalatongke Ni-Cu Deposit as Illustrated by Sulfide Textures.ECONOMIC GEOLOGY,117(8),1761-1778.
MLA Mao, Ya-Jing,et al."Sulfide Ore Formation of the Kalatongke Ni-Cu Deposit as Illustrated by Sulfide Textures".ECONOMIC GEOLOGY 117.8(2022):1761-1778.

入库方式： OAI收割

来源：地质与地球物理研究所

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