Comparisons among the Oortsog, Dulaan, and Nomgon mafic-ultramafic intrusions in central Mongolia and Ni-Cu deposits in NW China: implications for economic Ni-Cu-PGE ore exploration in central Mongolia
文献类型：期刊论文
| 作者 | Mao, Y. -J.1; Dash, B.2; Qin, K. -Z.1,3; Bujinlkham, B.2; Tang, D. -M.1 |
| 刊名 | RUSSIAN GEOLOGY AND GEOPHYSICS
 |
| 出版日期 | 2018 |
| 卷号 | 59期号:1页码:1-18 |
| 关键词 | Central Asian Orogenic Belt Ni-cu Deposit Platinum Group Elements Exploration Mafic-ultramafic Intrusion Central Mongolia |
| ISSN号 | 1068-7971 |
| DOI | 10.1016/j.rgg.2018.01.001 |
| 文献子类 | Article |
| 英文摘要 | Although there are many mafic-ultramafic intrusions in the western and central regions of Mongolia, Central Asian Orogenic Belt (CAOB), no economic-grade Ni-Cu deposits have yet been discovered. To understand the economic Ni-Cu deposit potential of the intrusions in central Mongolia, the parental magma affinity and sulfide saturation of the Oortsog, Dulaan, and Nomgon Ni-Cu mineralized mafic-ultramafic intrusions are studied. These three intrusions are predominantly gabbroic in composition, while the Oortsog and Dulaan intrusions also contain small proportions of peridotites. The parental magmas of the Oortsog and Dulaan intrusions are tholeiitic, as indicated by their Cr-spinel and clinopyroxene compositions, whereas the parental magma of the Nomgon intrusions is likely calc-alkaline. The compositions of Cr-spinel and clinopyroxene, combined with the presence of significant Nb-Ta depletions, indicate that these rocks were most likely derived from modified mantle sources. Both the Oortsog and Nomgon intrusions form two clusters in terms of their olivine composition, suggesting that multiple magma surges were involved during their emplacement. The relatively low Fo values and Ni contents in olivine from the three intrusions compared to those from Ni-Cu deposits in NW China, as well as those in the Voisey's Bay deposit in Canada, indicate that the three intrusions were crystallized from relatively evolved magmas. The Cu/Zr ratios of rocks of the Oortsog, Dulaan, and Nomgon intrusions are higher than 1, suggesting that these rocks contain cumulus sulfide. This, coupled with the presence of rounded sulfide inclusions in olivine of the Oortsog and Dulaan intrusions, suggests that sulfide saturation occurred before or during olivine crystallization. The distribution patterns of platinum group elements (PGEs) of the Dulaan and Oortsog intrusions record slight Rh, Pt, and Pd (PPGE) enrichment relative to Os, Ir, and Rh (IPGE). Furthermore, the Ni/Cu ratios of sulfide-bearing rocks from the Oortsog intrusion vary from 1.8 to 3.8, which are consistent with those of the Ni-Cu sulfide deposits in NW China. In contrast, the Ni/Cu ratios of sulfide-bearing rocks from the Nomgon intrusion are extremely low (0.03 to 0.07). This, together with the significant enrichment in PPGE relative to IPGE, suggests that these sulfides of the Nomgon intrusion were segregated from a magma that was extremely enriched in Cu and PPGE but depleted in Ni and IPGE. The characteristics of the chalcophile elements in these intrusions are attributed to the fact that the derivation of the Nomgon magma was significantly different from that of the Dulaan and Oortsog parental magmas. Overall, although the parental magmas of the intrusions in central Mongolia are more evolved than those in NW China, they are comparable in terms of the sizes of their intrusions, constituent minerals, and mineral chemistry. These similarities suggest that the intrusions in central Mongolia have economic Ni-Cu sulfide potential. Furthermore, intrusions similar to the Nomgon intrusion may feature PGE mineralization potential. (c) 2018, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved. |
| WOS关键词 | ASIAN OROGENIC BELT ; PLATINUM-GROUP ELEMENTS ; NI-CU-(PGE) SULFIDE DEPOSIT ; PHANEROZOIC CRUSTAL GROWTH ; EASTERN TIANSHAN ; WESTERN CHINA ; TECTONIC EVOLUTION ; NORTHWEST CHINA ; FLOOD BASALTS ; TARIM CRATON |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000422681800001 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Key Research and Development program of China(2017YFC061306) ; National Key Research and Development program of China(2017YFC061306) ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences to Dash Batulzii(KLMR2015-02) ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences to Dash Batulzii(KLMR2015-02) ; Nature Science Foundation of China(41502095 ; Nature Science Foundation of China(41502095 ; China Postdoctoral Science Foundation(2015M570146) ; China Postdoctoral Science Foundation(2015M570146) ; China Scholarship Council ; China Scholarship Council ; 41472075) ; 41472075) ; National Key Research and Development program of China(2017YFC061306) ; National Key Research and Development program of China(2017YFC061306) ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences to Dash Batulzii(KLMR2015-02) ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences to Dash Batulzii(KLMR2015-02) ; Nature Science Foundation of China(41502095 ; Nature Science Foundation of China(41502095 ; China Postdoctoral Science Foundation(2015M570146) ; China Postdoctoral Science Foundation(2015M570146) ; China Scholarship Council ; China Scholarship Council ; 41472075) ; 41472075) ; National Key Research and Development program of China(2017YFC061306) ; National Key Research and Development program of China(2017YFC061306) ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences to Dash Batulzii(KLMR2015-02) ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences to Dash Batulzii(KLMR2015-02) ; Nature Science Foundation of China(41502095 ; Nature Science Foundation of China(41502095 ; China Postdoctoral Science Foundation(2015M570146) ; China Postdoctoral Science Foundation(2015M570146) ; China Scholarship Council ; China Scholarship Council ; 41472075) ; 41472075) ; National Key Research and Development program of China(2017YFC061306) ; National Key Research and Development program of China(2017YFC061306) ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences to Dash Batulzii(KLMR2015-02) ; Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences to Dash Batulzii(KLMR2015-02) ; Nature Science Foundation of China(41502095 ; Nature Science Foundation of China(41502095 ; China Postdoctoral Science Foundation(2015M570146) ; China Postdoctoral Science Foundation(2015M570146) ; China Scholarship Council ; China Scholarship Council ; 41472075) ; 41472075) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/82522]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Mao, Y. -J.; Qin, K. -Z. |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Mongolian Univ Sci & Technol, Dept Geol & Mineral, Ulaanbaatar 46520, Mongol Peo Rep 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mao, Y. -J.,Dash, B.,Qin, K. -Z.,et al. Comparisons among the Oortsog, Dulaan, and Nomgon mafic-ultramafic intrusions in central Mongolia and Ni-Cu deposits in NW China: implications for economic Ni-Cu-PGE ore exploration in central Mongolia[J]. RUSSIAN GEOLOGY AND GEOPHYSICS,2018,59(1):1-18. |
| APA | Mao, Y. -J.,Dash, B.,Qin, K. -Z.,Bujinlkham, B.,&Tang, D. -M..(2018).Comparisons among the Oortsog, Dulaan, and Nomgon mafic-ultramafic intrusions in central Mongolia and Ni-Cu deposits in NW China: implications for economic Ni-Cu-PGE ore exploration in central Mongolia.RUSSIAN GEOLOGY AND GEOPHYSICS,59(1),1-18. |
| MLA | Mao, Y. -J.,et al."Comparisons among the Oortsog, Dulaan, and Nomgon mafic-ultramafic intrusions in central Mongolia and Ni-Cu deposits in NW China: implications for economic Ni-Cu-PGE ore exploration in central Mongolia".RUSSIAN GEOLOGY AND GEOPHYSICS 59.1(2018):1-18. |
入库方式： OAI收割
来源：地质与地球物理研究所
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