Hydrothermal origin of platinum-group minerals during serpentinization of the podiform chromitites from the Kizildag ophiolite in southern Turkiye
文献类型：期刊论文
| 作者 | Chen, Chen2,3; Wang, Christina Yan3; Yang, Saihong1; Uysal, Ibrahim4 |
| 刊名 | CHEMICAL GEOLOGY
 |
| 出版日期 | 2025-02-20 |
| 卷号 | 674页码:15 |
| 关键词 | Podiform chromitite Kizildag ophiolite Platinum-group mineral PGE-bearing pentlandite PGE nanophases |
| ISSN号 | 0009-2541 |
| DOI | 10.1016/j.chemgeo.2024.122563 |
| 英文摘要 | Platinum-group minerals (PGMs) in podiform chromitites usually occur in the interior and/or edge of chromite. However, the origin of PGMs in podiform chromitites has long been a matter of debate. Here we examined sub-micro to nanoscale textural features, morphologies, and compositions of PGMs from the disseminated, banded, massive and nodular chromitites in the Kizildag ophiolite in southern Turkiye, and found both primary and secondary PGMs. The aim of this study is to reveal the transformation processes from primary to secondary PGMs, thereby taking a thorough examination of the origin of these PGMs. Primary PGMs include laurite and Os-Ir alloy, which are prevalent in all samples. They are typically enclosed within or located at the edge of chromite, and formed either prior to or contemporaneously with the crystallization of chromite at temperature of 1100-1200 degrees C and logfS(2) values of -2 to -1. In contrast, PGE-bearing pentlandite are commonly present at the edge of chromite, corresponding to an increase of fS(2) with the progressive crystallization of chromite. These primary PGMs and PGE-bearing pentlandite in the intergranular space of chromite are susceptible to alter and transform into secondary PGMs and base metal mineral assemblages, which include Os-Ru nanophases (Os-Ru nanoparticle and OsRu3 nanoalloy) + awaruite (FeNi3) + trevorite (Fe2NiO4) in nodular chromitite, Os-rich laurite + Os-Ir(Ru) alloy/oxide + pentlandite + millerite (NiS) in banded and massive chromitite, and Ru(Ir) oxide + heazlewoodite (Ni3S2) in disseminated chromitite. The development of these diverse assemblages can be attributed to the degrees of serpentinization of chromitites. The nodular chromitite underwent weak serpentinization and had low water/rock ratios ( |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001392652400001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/81842]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Wang, Christina Yan |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Lunar & Deep Space Explorat, Beijing 100101, Peoples R China 2.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China 4.Karadeniz Tech Univ, Dept Geol Engn, TR-61080 Trabzon, Turkiye |
| 推荐引用方式 GB/T 7714 | Chen, Chen,Wang, Christina Yan,Yang, Saihong,et al. Hydrothermal origin of platinum-group minerals during serpentinization of the podiform chromitites from the Kizildag ophiolite in southern Turkiye[J]. CHEMICAL GEOLOGY,2025,674:15. |
| APA | Chen, Chen,Wang, Christina Yan,Yang, Saihong,&Uysal, Ibrahim.(2025).Hydrothermal origin of platinum-group minerals during serpentinization of the podiform chromitites from the Kizildag ophiolite in southern Turkiye.CHEMICAL GEOLOGY,674,15. |
| MLA | Chen, Chen,et al."Hydrothermal origin of platinum-group minerals during serpentinization of the podiform chromitites from the Kizildag ophiolite in southern Turkiye".CHEMICAL GEOLOGY 674(2025):15. |
入库方式： OAI收割
来源：广州地球化学研究所
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