GEOCHEMICAL AND MINERALOGICAL RELATIONSHIPS BETWEEN MANGANESE SILICATE MINERALS AND ZINC ORE MINERALIZATION AT GÜRECE CONTACT AUREOLE (BIGA PENINSULA, NW-TURKEY)
Abstract
In this study, we show the diversity of
bimetasomatic skarn mineralisation and associated zinc ore formation. At
Bakırlık Tepe hill we observed in a roof pendant contact
metamorphosed units of the Çetmi
Mélange bordering the monzonitic Gürece Pluton of Eocene age.
Additionally, two types
of endoskarn were identified in this zone;
diopside- bearing monzonite along
the garnet skarn
and hedenbergite-bearing monzogabbro along the pyroxene
skarn contacts. The ratio
of garnet skarn/pyroxene skarn is about 201. The presence of manganiferous minerals
(johannsenite, Mn- garnet, Mn-chlorite4 in the pyroxene
skarn provides evidence
for sphalerite mineralization at temperatures less than
400°C, under high oxygen fugacity and in the presence of water-enriched fluids.
Keywords
References
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Details
Primary Language
English
Subjects
-
Journal Section
Research Article
Authors
Publication Date
December 28, 2013
Submission Date
May 6, 2013
Acceptance Date
-
Published in Issue
Year 2012 Volume: 25 Number: 2