| Autor: |
Hossein Bagherpour, Mir Ali Asghar Mokhtari, Hossein Kouhestani, Ghasem Nabatian, Behnam Mehdikhani |
| Jazyk: |
perština |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Journal of Economic Geology, Vol 11, Iss 4, Pp 545-564 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2008-7306 |
| DOI: |
10.22067/ECONG.V11I4.71615 |
| Popis: |
Introduction The Qoyjeh Yeylaq Pb-Zn (Ag) deposit located 120 km southeast of Zanjan, is situated in the Urumieh-Dokhtar magmatic arc. apart from Prior to this research no work has been published on Pb-Zn (Ag) mineralization at the Qoyjeh Yeylaq except for small scale geological maps of the area, i.e. 1:250,000 geological maps of Kabudar Ahang (Bolourchi and Hajian, 1979), 1:100,000 geological maps of Marzban (Majidifard and Shafei, 2006) and a number of unpublished Pb-Zn exploration reports. The present paper provides an overview of the geological framework, mineralization characteristics, and results of geochemistry study of the Qoyjeh Yeylaq deposit with application to ore genesis. Identification of these characteristics can be used as a model for exploration of this type of Pb-Zn (Ag) mineralization in this area and elsewhere. Materials and methods Detailed field work has been carried out at different scales in the Qoyjeh Yeylaq area. About 26 polished- thin and thin sections from host rocks, mineralized and altered zones were studied by conventional petrographic and mineralogic methods at the University of Zanjan. In addition, a total of 11 samples from fresh and altered host rocks and ore zones at the Qoyjeh Yeylaq deposit were analyzed by ICP-MS for trace elements and REE compositions at Zarazma Co., Tehran, Iran. Results and Discussion The host rocks at the Qoyjeh Yeylaq deposit consist of Oligo-Miocene volcano-sedimentary rocks which are overlain conformably by Oligo-Miocene sedimentary rocks. Volcanic rocks are mostly basaltic andesite and andesite lava flows. Basaltic andesites with porphyritic texture consist of predominantly plagioclase (70 vol%) and clinopyroxene (25 vol%) phenocrysts with accessory Hornblende ( |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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