Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.13091/2506
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dc.contributor.authorErcan, Hatice Ünal-
dc.contributor.authorEce, O. Işık-
dc.contributor.authorSchroeder, Paul A.-
dc.contributor.authorGülmez, Fatma-
dc.date.accessioned2022-05-23T20:23:44Z-
dc.date.available2022-05-23T20:23:44Z-
dc.date.issued2022-
dc.identifier.issn0169-1368-
dc.identifier.issn1872-7360-
dc.identifier.urihttps://doi.org/10.1016/j.oregeorev.2022.104726-
dc.identifier.urihttps://hdl.handle.net/20.500.13091/2506-
dc.description.abstractThe Oligo-Miocene Etili epithermal deposits are a well-preserved fossil geothermal system in the Canakkale Region and is one of the largest fossil siliceous hot spring deposits of Turkey. Main E-W and NE-SW trending faults systems occur with minor NW-SE fracture systems perpendicular to the main faults. Silica-rich deposits are commonly observed in or on the calc-alkaline tuffs, ashes and pyroclastic rocks that were the products of the magmatism controlled by the extensional tectonic regime. The Etili epithermal system was examined at two representative locations including the Hamamtepe and Muratlar sites. Morphologies of the proximal apron were defined by lithofacies that included silica infiltrate, spring conduits, nodular and finely laminated geyserite, sinter clast breccia, silicified volcanic rocks, and epithermal veins. Microfossils were detected in mat structures developed in the proximal apron. The silica deposits have low abundances of altered mineral assemblages (e.g., kaolinite, halloysite, and alunite), which are otherwise commonly observed in the region. The origin of the Etili Fossil Silica Sinter Region (EFSSR) was constrained by using geochemical and isotopic data. delta O-18 and dD isotopic values of kaolinites ranged +9.4/+9.6 parts per thousand; to 84/74 parts per thousand respectively. delta O-18 isotopic values from siliceous and silicified samples ranged from 8.3 to 18.4 parts per thousand, which shows two different formation types for the Etili Fossil Silica Sinter Region. We hypothesized hypogene origins for the kaolins and a mixed hypo/supergene origin for siliceous and silicified samples. The calculated model formation temperature from the delta O-18 values of the silica and siliceous samples is in the range of 63 degrees to 140 degrees C. delta S-34 isotopic values of alunite ranged from -19.6 to +16.6 parts per thousand, which also indicated two different sources that include magmatic hydrothermal and meteoric waters affected by bacterial activity. The timing of acid-sulphate alteration can be grouped into three periods by Ar-40/Ar-39 dating of alunites. These ages are: (A) 32.4 +/- 1.2 to 22.6 +/- 0.22 Ma in the Muratlar silica site, (B) 12.3 +/- 0.3 to 15.2 +/- 0.3 Ma in the northern part of the Hamamtepe site and (C) 5 +/- 0.18 to 7 +/- 0.3 Ma in the southern part of the Hamamtepe silica site. These consistent findings show that the emplacement periods of the Evciler pluton and the ages of alteration deposits are similar to each other. Silica sinters and geyser mounds represent very late stage near-neutral pH alkali chloride geothermal activities. The epithermal deposits in the EFSSR comprises a complex history of three different hydrothermal processes, each of which have different compositional and temporal emplacement periods related to the Evciler pluton.en_US
dc.description.sponsorshipTUBITAK [112Y369]en_US
dc.description.sponsorshipThis research is made possible with the support of TUBITAK Project No: 112Y369 (Prof. Dr. Omer Isik Ece). We express our gratitude to ITU-JAL labs for providing technical supports during geochemical and ICP-MS analysis in ITU, Turkey, Julie Cox of stable isotope geochemistry analyses in the UGA, Athens, USA and Chris Hall for <SUP>40</SUP>Ar/<SUP>39</SUP>Ar studies in the University of Michigan, USA. Also, we express our gratitude to Kalemaden Mining Corp. for their logistic support and accommodations during the fieldwork in the summers of 2014 and 2020.en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofOre Geology Reviewsen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectSilica sinteren_US
dc.subjectKaoliniteen_US
dc.subjectAluniteen_US
dc.subjectSilica depositsen_US
dc.subjectSilica lithofaciesen_US
dc.subjectHydrothermal alterationen_US
dc.subjectStable and radiogenic isotopesen_US
dc.subjectTaupo Volcanic Zoneen_US
dc.subjectYellowstone-National-Parken_US
dc.subjectStable-Isotope Geochemistryen_US
dc.subjectHot-Spring Depositsen_US
dc.subjectAlunite Depositsen_US
dc.subjectBiga Peninsulaen_US
dc.subjectNew-Zealanden_US
dc.subjectGeothermal-Fielden_US
dc.subjectLow-Temperatureen_US
dc.subjectMicrobial Silicificationen_US
dc.titleCharacteristics and evolution of the Etili silica sinter epithermal deposits, canakkale - Turkey: Relation to alkali chloride vs acid-sulfate fluidsen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.oregeorev.2022.104726-
dc.identifier.scopus2-s2.0-85123856258en_US
dc.departmentMeslek Yüksekokulları, Teknik Bilimler Meslek Yüksekokulu, Kimya ve Kimyasal İşleme Teknolojileri Bölümüen_US
dc.identifier.volume142en_US
dc.identifier.wosWOS:000766746300001en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.scopusqualityQ1-
item.openairetypeArticle-
item.languageiso639-1en-
item.cerifentitytypePublications-
item.grantfulltextopen-
item.fulltextWith Fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
crisitem.author.dept07. 04. Department of Chemistry and Chemical Processing Technologies-
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections
Teknik Bilimler Meslek Yüksekokulu Koleskiyonu
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections
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