Contrasting platinum-group element geochemistry of post-collisional porphyry Cu & PLUSMN; Au ore-bearing and barren suites in the central and southeastern Urumieh-Dokhtar magmatic arc, Iran
文献类型：期刊论文
| 作者 | Hwang, Jiwon2; Park, Jung-Woo2,3; Wan, Bo1; Honarmand, Maryam4 |
| 刊名 | MINERALIUM DEPOSITA
 |
| 出版日期 | 2023-07-29 |
| 页码 | 21 |
| ISSN号 | 0026-4598 |
| 关键词 | Platinum group elements Porphyry Cu deposit Chalcophile element fertility Sulfide saturation Iran Post-collisional magmas |
| DOI | 10.1007/s00126-023-01195-7 |
| 英文摘要 | The Urumieh-Dokhtar magmatic arc (UDMA), Iran, hosts giant to small porphyry Cu & PLUSMN; Au deposits associated with Miocene post-collisional magmatism. Previous studies suggested that the ore-bearing suites are derived from chalcophile element-rich juvenile lower crustal igneous rocks, and that metal contents in the magmas play an important role in the formation of porphyry Cu & PLUSMN; Au deposits in this region. This study investigates the whole-rock major, trace, and platinum group element (PGE) geochemistry, as well as zircon trace element geochemistry, of six porphyry Cu & PLUSMN; Au ore-bearing suites and three barren suites in the central and southeastern UDMA. The aim is to revisit their petrogenesis and understand the factors controlling the formation of post-collisional porphyry Cu & PLUSMN; Au deposits. The high Mg# and Cr and Ni contents of the most mafic variants of ore-bearing and barren rocks suggest that they are primarily derived from the mantle. However, the ore-bearing magmas from the small Dalli Cu-Au porphyry and barren magmas from central to southeastern UDMA experienced substantial crustal assimilation during evolution. The evolved ore-bearing magmas exhibit high La/Yb and Sr/Y ratios, along with concave upward chondrite-normalized REE patterns and high zircon Ce/Nd and Eu/Eu* values, suggesting that they have undergone amphibole dominant differentiation under hydrous and oxidized conditions. In contrast, the barren magmas are characterized by lower whole-rock La/Yb and Sr/Y and zircon Ce/Nd and Eu/Eu* values with flatter REE patterns, implying plagioclase dominant differentiation. The ore-bearing suites, except for the Dalli suite, have systematically higher Pd and Pt contents than barren suites with highly fractionated PGE patterns (high Pd/Ir). The chalcophile element fertility of the ore-bearing suites, as indicated by high Pd/MgO and Pd/Pt ratios, is comparable to that observed in porphyry Cu deposits found elsewhere. This similarity suggests that the Cu contents of the magma likely played acrucial role in the formation of the porphyry Cu deposits in the central and southeastern UDMA. Late sulfide saturation or small amounts of sulfide segregation may have led to the high Cu and moderate Pd contents of the ore-bearing magmas until the late stage of differentiation. In contrast, early sulfide saturation resulted in significant depletion in all PGE and Cu in the barren magma. The fractionated PGE patterns of the ore-bearing magmas could have arisen due to two potential processes. Firstly, they may have resulted from fractional crystallization of Cr-spinel in the early sulfide undersaturated differentiation. Secondly, the patterns might have been inherited from partial melting of metasomatized lithospheric mantle. The systematic geochemical differences between ore-bearing and barren suites suggest that the more hydrous and oxidized nature and higher Cu contents of the ore-bearing magmas substantially increase the porphyry Cu ore potential in the central and southeastern UDMA. |
| WOS关键词 | HIGHLY SIDEROPHILE ELEMENTS ; ALPINE-HIMALAYAN COLLISION ; NEW-SOUTH-WALES ; ZIRCON U-PB ; COPPER-DEPOSITS ; EXPERIMENTAL CONSTRAINTS ; AUSTRALIA IMPLICATIONS ; LITHOSPHERIC MANTLE ; SULFIDE SATURATION ; PLUTONIC COMPLEX |
| 资助项目 | National Research Foundation (NRF) of Korea[2022R1A2C1011741] ; NRF-Ministry of Science Information and Technology (MSIT), Korea[2022R1A5A1085103] ; International Partnership Program of Chinese Academy of Sciences[132744KYSB20190039] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:001039840900002 |
| 资助机构 | National Research Foundation (NRF) of Korea ; National Research Foundation (NRF) of Korea ; NRF-Ministry of Science Information and Technology (MSIT), Korea ; NRF-Ministry of Science Information and Technology (MSIT), Korea ; International Partnership Program of Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences ; National Research Foundation (NRF) of Korea ; National Research Foundation (NRF) of Korea ; NRF-Ministry of Science Information and Technology (MSIT), Korea ; NRF-Ministry of Science Information and Technology (MSIT), Korea ; International Partnership Program of Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences ; National Research Foundation (NRF) of Korea ; National Research Foundation (NRF) of Korea ; NRF-Ministry of Science Information and Technology (MSIT), Korea ; NRF-Ministry of Science Information and Technology (MSIT), Korea ; International Partnership Program of Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences ; National Research Foundation (NRF) of Korea ; National Research Foundation (NRF) of Korea ; NRF-Ministry of Science Information and Technology (MSIT), Korea ; NRF-Ministry of Science Information and Technology (MSIT), Korea ; International Partnership Program of Chinese Academy of Sciences ; International Partnership Program of Chinese Academy of Sciences |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/111358]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Hwang, Jiwon; Park, Jung-Woo |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 08826, South Korea 3.Seoul Natl Univ, Res Inst Oceanog, Seoul 08826, South Korea 4.Inst Adv Studies Basic Sci IASBS, Dept Earth Sci, Zanjan 45137 66731, Iran |
| 推荐引用方式 GB/T 7714 | Hwang, Jiwon,Park, Jung-Woo,Wan, Bo,et al. Contrasting platinum-group element geochemistry of post-collisional porphyry Cu & PLUSMN; Au ore-bearing and barren suites in the central and southeastern Urumieh-Dokhtar magmatic arc, Iran[J]. MINERALIUM DEPOSITA,2023:21. |
| APA | Hwang, Jiwon,Park, Jung-Woo,Wan, Bo,&Honarmand, Maryam.(2023).Contrasting platinum-group element geochemistry of post-collisional porphyry Cu & PLUSMN; Au ore-bearing and barren suites in the central and southeastern Urumieh-Dokhtar magmatic arc, Iran.MINERALIUM DEPOSITA,21. |
| MLA | Hwang, Jiwon,et al."Contrasting platinum-group element geochemistry of post-collisional porphyry Cu & PLUSMN; Au ore-bearing and barren suites in the central and southeastern Urumieh-Dokhtar magmatic arc, Iran".MINERALIUM DEPOSITA (2023):21. |
入库方式： OAI收割
来源：地质与地球物理研究所
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