Bozkaya, O, Bozkaya, G, Hanilci, N et al. (3 more authors) (2019) Mineralogical and geochemical evidence of late epithermal alteration in the Kisladag porphyry gold deposit, Usak, Western Turkey. In: Life with Ore Deposits on Earth, Proceedings vol 3. 15th biennial SGA conference, 27-30 Aug 2019, Glasgow. Society for Geology Applied to Mineral Deposits , pp. 1031-1034. ISBN 9780852619643
Abstract
The Kışladağ porphyry gold deposit is related to Miocene intrusive and sub-volcanic rocks that resulted from an extensional tectonic regime in western Anatolia. The main lithologies of the deposit are quartz-trachytes to quartz-latites and volcanoclastic rocks intruded by sub-volcanic porphyritic rocks. Three different intrusive phases which have been identified from their age, alteration grade and mineralization (IN-1: the oldest intrusion, intense potassic alteration, IN-2/2A: intense clay-quartz alteration, IN-3: the youngest intrusion, weak alteration). IN-1 contains quartz, illite and kaolinite, IN-2Ahas quartz, adularia, illite, kaolinite and smectite. Alunite, jarosite and tourmaline increase in IN-1 and IN-2A; whereas biotite and illite increase in IN-1 and IN-2A, respectively. The volcanoclastic rocks are composed of quartz, alunite and kaolinite/halloysite indicating advanced argillic alteration. Although the microscopic data confirms potassic and phyllic alterations in IN-1 andIN-2A, mineralogical (well crystallized 1M and poorly crystallized 1M d illite, kaolinite/halloysite, alunite, jarosite) and geochemical (K/Ar age data for different grain-sized illite indicating late overprinting at least 5 Ma) data indicate that the early stage alteration phases were overprinted by the late stage epithermal alteration.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst of Geophysics and Tectonics (IGT) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 20 Sep 2019 09:43 |
Last Modified: | 20 Sep 2019 09:43 |
Status: | Published |
Publisher: | Society for Geology Applied to Mineral Deposits |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:151137 |