Mineralogy of gold in the Elshitsa massive sulphide deposit, Sredna Gora zone, Bulgaria

The Elshitsa volcanic hosted massive sulphide deposit occurs in the central part of the Srena Gora metallogenic zone in Bulgaria. The gold-bearing massive sulphide mineralization is considered to be the product of an island arc volcano-plutonic process and hydrothermal activity that took place durin...

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Bibliographic Details
Published in:Mineralium deposita 1997-05, Vol.32 (3), p.219-229
Main Authors: Bogdanov, K., Tsonev, D., Kuzmanov, K.
Format: Article
Language:English
Subjects:
Cretaceous
Geology
Gold
Island arcs
Mineralization
Mineralogy
Minerals
Particle size
Pyrite
Silver
Sulfides
Volcanoes
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Summary:The Elshitsa volcanic hosted massive sulphide deposit occurs in the central part of the Srena Gora metallogenic zone in Bulgaria. The gold-bearing massive sulphide mineralization is considered to be the product of an island arc volcano-plutonic process and hydrothermal activity that took place during the Late Cretaceous. In addition to the major gold-hosted opaque minerals such as pyrite, chalcopyrite, sphalerite and galena there are minor phases of tennantite, goldfieldite, Se-bearing aikinite, native silver and bornite in the massive sulphide lenses and stringer zones. Most of the sulphide minerals are Se-bearing. All of the six mineral assemblages that were deposited during the pyrite and copper-pyrite stages of mineralization are gold-bearing. The gold tenor as a rule is less than 1 g/t. Native gold and electrum occur as blebs or intergranular particles in the sulphide minerals. Gold in the early massive pyrite is of submicroscopic type (
ISSN:0026-4598
1432-1866
DOI:10.1007/s001260050087