The composition of major minerals from the Buchim porphyry copper deposit, Republic of Macedonia

Serafimovski, Todor and Dolenec, Tadej and Tasev, Goran and Rogan, Nastja and Dolenec, Matej (2008) The composition of major minerals from the Buchim porphyry copper deposit, Republic of Macedonia. Geologica Macedonica, 22 (1). pp. 17-26. ISSN O352-1206

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Abstract

Our current study of major ore and rock forming minerals enclosed the most important minerals
within the Buchim ore deposit. Rock forming minerals were represented by plagioclase, K-feldspars, biotite and amphiboles.
Beside their complex formulas those minerals have shown quite uniform compositions. Amphiboles were
determined as hornblende, biotites were characterized by increased Fe and Ti and decreased Mg concentrations, plagioclases
were determined as sanidine while K-feldspars were represented by albites and oligoclases. We have shown
that the chalcopyrite composition is highly pure without any significant presence of Ni, Co, As and Sb (<0.01%). Pyrite
analyses have shown that there are increased arsenic concentrations of 0.15 ÷ 0.22 % As, such concentrations of
arsenic are indicative, but are very characteristic for low temperature pyrites from porphyry copper deposits. Beside
the arsenic in pyrites, there were determined increased Ni concentrations 0.45 ÷ 1.42 % Ni, while Co and Sb remain
below 0.01%.

Item Type:	Article
Subjects:	Natural sciences > Earth and related environmental sciences
Divisions:	Faculty of Natural and Technical Sciences
Depositing User:	Goran Tasev
Date Deposited:	21 Nov 2012 18:19
Last Modified:	21 Nov 2012 18:19
URI:	https://eprints.ugd.edu.mk/id/eprint/1574

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