Geochemistry of hydrothermally altered rocks from the Asarel porphyry copper deposit, Central Srednogorie

Pages: 
pp. 3-28
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
Abstract: 

The distribution of major and trace elements in hydrothermal alteration zones (propylitic, argillic, sericitic and advanced argillic) from the Asarel porphyry copper deposit is studied. Strontium was found to demonstrate the most characteristic behaviour among all studied elements – it is depleted from propylitic, argillic and sericitic rocks and concentrates in advanced argillic rocks where it is included in alunite and APS minerals. Manganese, Co, Ni, Zn, Cs, Y, MREE and HREE are strongly mobile and are depleted with increasing of alteration degree, while Rb concentrates in sericitic rocks. Titanium, Zr, V, Ta, Nb, Th, U and LREE have inert behaviour during alteration. Alunite, APS minerals and rutile are the minerals that control the geochemistry of trace elements in the zones of advanced argillic alteration.

Keywords: 

trace elements, hydrothermal alteration, advanced argillic alteration, alunite, APS minerals, Asarel porphyry copper deposit

VOLUME 42 (1-3)/December 2013

Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd, 1504 Sofia, Bulgaria
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Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd, 1504 Sofia, Bulgaria
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Geological-Paleontological Institute, Geoscience Department, Basel University
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Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

National Museum of Natural History, Bulgarian Academy of Sciences, 1 Blvd. Tsar Osvoboditel, 1000 Sofia, Bulgaria
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School of Geology, Aristotle University, 54124 Thessaloniki, Greece
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School of Geology, Aristotle University, 54124 Thessaloniki, Greece; E-mail: lilits@geo.auth.gr

Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113, Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113, Sofia, Bulgaria

Albanian Geological Survey, Rruga e Kavajes, 153, Tirana, Albania
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Institute of Geosciences, Water, Energy and Environment, Polytechnic University of Tirana, Tirana, Albania

Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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University of Architecture, Civil Engineering and Geodesy, Hristo Smirnenski Blvd. 1, 1046 Sofia, Bulgaria