Emplacement and ore potential of the Permian Pobei mafic-ultramafic complex, NE Tarim, NW China
文献类型：期刊论文
| 作者 | Yang, Sheng-Hong5; Zhou, Mei-Fu3,4; Wang, Christina Yan1; Jiang, Changyi2 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2024-03-15 |
| 卷号 | 263页码:23 |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2023.105992 |
| 英文摘要 | A number of mafic-ultramafic intrusions with variable degrees of Ni-Cu sulfide mineralization occur in the northeastern Tarim Block and East Tianshan Orogenic Belt (NW China). Among them, the Pobei complex is composed of a gabbro body intruded by several ultramafic bodies including Poyi and Poshi. These bodies have similar mineralogy and chemical compositions and were derived from a common magma. Olivine crystals from the Poyi and Poshi bodies generally have high Fo contents with the highest Fo value of 89.5 and Ni up to 3300 ppm Ni, indicative of crystallizing from Ni-undepleted, high -Mg basaltic magmas. Sr-Nd-Pb isotopic compositions show that more mafic rocks show relatively low degrees of crustal contamination, whereas more evolved rocks experienced higher degrees of contamination, especially in the upper part of the complex. Olivine crystals from both the Poyi and Poshi bodies show sharp decrease of Ni with decreasing Fo values, indicating sulfide segregation in these two bodies. Gabbros may have potential of reef -type chromite mineralization at the deep level, and V -bearing magnetite mineralization at higher stratigraphic level corresponding to the current surface level, but the potential of PGE mineralization is low. We propose that the ultramafic bodies of the Pobei complex may have been formed from the injection of olivine- and sulfide -laden crystal slurry from the bottom of a large magma chamber. The NiCu mineralization was triggered by the crustal contamination. The Pobei complex was formed by the multiple intrusions of magmas to form the current complex. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001171096200001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/77300]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Yang, Sheng-Hong |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China 2.Changan Univ, Dept Earth Resources, Xian, Peoples R China 3.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Peoples R China 4.China Univ Geosci, Sch Earth Resources, Wuhan 430074, Peoples R China 5.Univ Oulu, Oulu Min Sch, Oulu, Finland |
| 推荐引用方式 GB/T 7714 | Yang, Sheng-Hong,Zhou, Mei-Fu,Wang, Christina Yan,et al. Emplacement and ore potential of the Permian Pobei mafic-ultramafic complex, NE Tarim, NW China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2024,263:23. |
| APA | Yang, Sheng-Hong,Zhou, Mei-Fu,Wang, Christina Yan,&Jiang, Changyi.(2024).Emplacement and ore potential of the Permian Pobei mafic-ultramafic complex, NE Tarim, NW China.JOURNAL OF ASIAN EARTH SCIENCES,263,23. |
| MLA | Yang, Sheng-Hong,et al."Emplacement and ore potential of the Permian Pobei mafic-ultramafic complex, NE Tarim, NW China".JOURNAL OF ASIAN EARTH SCIENCES 263(2024):23. |
入库方式： OAI收割
来源：广州地球化学研究所
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