Intermediate sulfidation epithermal gold-base metal deposits in Tertiary subaerial volcanic rocks, Sahinli/Tespih Dere (Lapseki/Western Turkey)

Yilmaz H., OYMAN T., SÖNMEZ F. N., Arehart G. B., Billor Z.

ORE GEOLOGY REVIEWS, vol.37, pp.236-258, 2010 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Review
  • Volume: 37
  • Publication Date: 2010
  • Doi Number: 10.1016/j.oregeorev.2010.04.001
  • Journal Name: ORE GEOLOGY REVIEWS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.236-258
  • Keywords: Gold, Base metals, Hydrothermal alteration, Fluid inclusions, Stable isotopes, Epithermal, Turkey, OXYGEN-ISOTOPE RATIOS, GEOTHERMAL SYSTEMS, FLUID INCLUSIONS, D-H, MINERALIZATION, PORPHYRY, DISTRICT, WESTERN, QUARTZ, SILVER
  • Dokuz Eylül University Affiliated: Yes

Abstract

Gold in the Sahinli and Tespih Dere intermediate sulfidation gold-base metal deposits in Western Turkey occurs in relatively deep epithermal quartz veins along with base metal minerals which have epithermal textures, including plumose quartz, vug infills, comb and cockade textures and matrix-supported milled breccias. The total sulfide content of the veins in the area is variable ranging from <1% to 60% and is dominated by pyrite, galena, sphalerite and chalcopyrite. Sphalerite is Fe-poor (0.6 to 1.4 mol% FeS). Minor amounts of Ag-rich tetrahedrite are present. Primary hydrothermal alteration minerals include illite/muscovite, mixed-layer illite/smectite (11.6 angstrom) and clinochlore towards the east and, alunite, dickite/nacrite and pyrophyllite towards the west at Sahinli; major illite/muscovite and dickite occur at Tespih Dere and Sarioluk, respectively.