Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.569954
Title: Controls on the characteristics, timing and distribution of epithermal gold deposits in western Turkey
Author: Wedin, Francis
Awarding Body: Cardiff University
Current Institution: Cardiff University
Date of Award: 2013
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Abstract:
A study of epithermal gold mineralisation has been conducted across the Western Anatolian Volcanogenic and Extensional Zone (WAVE) in western Turkey. A Bulk Leach Extractable Gold stream sediment survey was undertaken, in addition to rockchip sampling and analysis of drill core, and mapping. Clay samples from the Simav Fault were dated, geophysical data over the study area analysed, and new GIS data was examined. Hitherto unknown epithermal gold deposits –including Akçapınar, Kőprűbaşı and Yaylabayır - have been discovered during the progress of this largely field based study, as well as a north-east striking gold deposit belt, named the Kozak Gold Corridor. Kőprűbaşı is among a number of jasperoid-hosted deposits which represent a new deposit analogue in WAVE, termed “Demirci-Type”. This research has produced a new geological model for the formation of epithermal gold deposits in the WAVE Zone. The model links a south-west migration of the subduction zone in WAVE during the Miocene with similar patterns of gold deposition, with the latter occurring in at least one distinct episode between 19 and 23Ma. Dacitic to rhyolitic volcanics acted as highly favourable host rocks for gold deposition, while ophiolitic mélange and Pan-African schist rocks are shown to provide a secondary crustal enrichment of gold, and the main structural controls are observed to be east-west P shears and north west-south east R1 shears. The Simav Fault is shown to be mineralised and a crucial deep conduit for gold deposits in its hangingwall. Tilting of graben and half-graben blocks in WAVE accounts for different degrees of uplift and erosion between deposits of similar age, such as Kızılçukur and Kızıltepe. Future gold exploration in the region should be focussed on targeting similar parameters to this model. The Kozak Gold Corridor and Sındırgı Gold Corridor are deemed prospective for further discoveries.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.569954  DOI: Not available
Keywords: QE Geology
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