The role of evaporite in iron oxide-apatite ore deposit formation: Constraints of the late Miocene Abovyan deposit, Armenia
文献类型：期刊论文
| 作者 | Nekrylov, Nikolai7; Hovakimyan, Samvel7; Meliksetian, Khachatur B.7; Veress, Ervin6; Bergemann, Christian A.5; Hambaryan, Karen7; Chiaradia, Massimo4; Vardanyan, Arman3; Navasardyan, Gevorg7; Korneeva, Alina2 |
| 刊名 | LITHOS
 |
| 出版日期 | 2025-09-01 |
| 卷号 | 508页码:15 |
| 关键词 | IOA deposit Abovyan Sr-Nd Apatite REE |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2025.108078 |
| 通讯作者 | Hovakimyan, Samvel(samvel.hovak@gmail.com) |
| 英文摘要 | Iron Oxide-Apatite (IOA) deposits are a notable source of iron, and, potentially, of phosphorus and rare earth elements (REE). The vast majority of these deposits are ancient (from similar to 1900 to similar to 100 Ma), and their original textures and mineral associations are overprinted by regional and local metasomatic/metamorphic processes. In the present paper, we provide new petrographic, mineralogical and geochemical data on the poorly studied Abovyan IOA deposit in Armenia, one of the world's youngest IOA deposits. The Late Miocene magnetite-apatite Abovyan deposit is hosted by a subvolcanic andesite body located in the volcanic zone of Gegham Highland. The ore mineralization is hosted in andesite and consists of disseminated magnetite-carbonate blobs, breccia and massive magnetite-apatite bodies. Disseminated blobs mostly consist of magnetite-clinopyroxene-dolomitehematite-calcite assemblages, whereas the mineralogical diversity increases toward the massive ore bodies with the appearance of Th- (thorite, monazite) and REE-rich (monazite, REE-silicates) minerals. Abundant inclusions of halite and sylvite were also found in magnetite from massive ore. Massive magnetite-apatite ore is depleted in Rb, Ba, K, Sr and HFSE and enriched in REE, Th, U and Pb relative to host andesite. The host rocks have more radiogenic Sr-87/Sr-86 ratios of similar to 0.7053 than other volcanic rocks in the Gegham highland with ratios of similar to 0.7042. The apatite from nine ores samples have even more radiogenic Sr-87/Sr-86 ratios of similar to 0.706 for the same epsilon Nd values. These data allow us to conclude that ore formation is likely linked to liquid immiscibility triggered by the assimilation of Sr-rich and Nd-poor crustal material. The local source for such assimilated material is the K-rich evaporite of the Yerevan salt basin. |
| WOS关键词 | ARABIA-EURASIA COLLISION ; PORPHYRY CU-MO ; LESSER CAUCASUS ; EL LACO ; TRACE-ELEMENTS ; MAGNETITE ; ZONE ; GEOCHEMISTRY ; ORIGIN ; EVOLUTION |
| 资助项目 | Higher Education and Science Committee of RA[23PostDoc-1E001] ; Higher Education and Science Committee of RA[22IRF-08] ; Swiss National Science Foundation[200021-188714] ; Institute of Geological Sciences of the Armenian National Academy of Sciences (IGS) |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001467792100001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/201668]  |
| 专题 | 中国科学院海洋研究所 |
| 通讯作者 | Hovakimyan, Samvel |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China 2.RAS, Inst Expt Mineral, Chernogolovka 142432, Russia 3.Zangezur Copper Molybdenum Combine CJSC, Kadjaran 3309, Armenia 4.Univ Geneva, Dept Earth Sci, Geneva, Switzerland 5.Heidelberg Univ, Inst Earth Sci, Heidelberg, Germany 6.Lulea Univ Technol, Lulea, Sweden 7.Armenian Natl Acad Sci, Inst Geol Sci, Yerevan, Armenia |
| 推荐引用方式 GB/T 7714 | Nekrylov, Nikolai,Hovakimyan, Samvel,Meliksetian, Khachatur B.,et al. The role of evaporite in iron oxide-apatite ore deposit formation: Constraints of the late Miocene Abovyan deposit, Armenia[J]. LITHOS,2025,508:15. |
| APA | Nekrylov, Nikolai.,Hovakimyan, Samvel.,Meliksetian, Khachatur B..,Veress, Ervin.,Bergemann, Christian A..,...&Moritz, Robert.(2025).The role of evaporite in iron oxide-apatite ore deposit formation: Constraints of the late Miocene Abovyan deposit, Armenia.LITHOS,508,15. |
| MLA | Nekrylov, Nikolai,et al."The role of evaporite in iron oxide-apatite ore deposit formation: Constraints of the late Miocene Abovyan deposit, Armenia".LITHOS 508(2025):15. |
入库方式： OAI收割
来源：海洋研究所
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