Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/9530
Title: Illite occurrences related to volcanic-hosted hydrothermal mineralization in the Biga Peninsula, NW Turkey: Implications for the age and origin of fluids
Authors: Bozkaya, Ömer
Bozkaya, Gülcan
Uysal, I.T.
Banks, D.A.
Keywords: Base metal deposit
Biga Peninsula
Clay mineralogy and geochemistry
Hydrothermal alteration
Turkey
Clay alteration
Clay deposits
Clay minerals
Deposits
Geochemistry
Isotopes
Magnesium
Mineralogy
Minerals
Ores
Rubidium
Temperature
Trace elements
Base metals
Biga peninsulas
Clay mineralogy
Hydrothermal alterations
Hydrochemistry
base metal
extensional tectonics
fluid inclusion
geochemical method
hydrothermal activity
hydrothermal alteration
hydrothermal fluid
illite
mineralization
mineralogy
ore deposit
Balikesir [Turkey]
Publisher: Elsevier
Abstract: A different approach to investigate the origin of fluids, temperature conditions, age of hydrothermal activity of mineralization in the Biga Peninsula, (Koru, Tesbihdere and Kumarlar) employed mineralogical (illite Kübler Index, b cell dimension, polytype) and geochemical (major, trace/REE, O-stable isotope and Rb/Sr dating) methods. The Kübler Index (KI) values of illites indicate different temperature conditions, such as low temperature (high-grade diagenesis) for Koru deposit, and high temperature (anchizone) for the Tesbihdere and Kumarlar deposits. The textural, mineralogical and geochemical data from illites show that these have potential for estimating the age of hydrothermal activity and fluid characteristics. Both mineralogical (high grade diagenetic to anchizonal KI, 1M polytype, low d060 values) and geochemical (similar major and trace element composition to host-rocks, low octahedral Mg + Fe contents, oxygen and hydrogen isotope composition) data are compatible with commonly known hydrothermal illites. Stable isotope data of illites are well matched to similar data from fluid inclusions, which indicate mainly magmatic fluids. The Rb/Sr age (22.4 ± 2.3 Ma: latest Oligocene and lowest Miocene) of the illites coincides with plutonic intrusions that are the main instigators of hydrothermal activities related to the extensional tectonic regime in the Biga Peninsula. The mineralogical and geochemical data of illites have some important advantages with respect to the use of fluid inclusions in determining ?D of hydrothermal fluids thereby leading to better understanding ore-forming hydrothermal conditions. © 2016 Elsevier B.V.
URI: https://hdl.handle.net/11499/9530
https://doi.org/10.1016/j.oregeorev.2016.01.001
ISSN: 0169-1368
Appears in Collections:Mühendislik Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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