Dwarf copper-gold porphyry deposits of the Buchim-Damjan-Borov Dol ore district, Republic of Macedonia (FYROM)

Abstract

Abstract-The metallogenic aspects, tectonic setting, magmatism, structure, and composition of Au-and Ag-bearing porphyry copper deposits in the Buchim-Damjan-Borov Dol ore district and their genetic fea tures are considered and compared with earlier published data. Special attention is paid to supergene gold in heavy concentrate halos of the Borov Dol deposit. The total Cu reserves ofthe deposits discussed in this paper do not exceed 150 kt. The Buchim deposit likely is the world's smallest deposit of this type currently involved in mining. A comprehensive study ofthese dwarf porphyry copper deposits is undertaken to answer questions on the conditions of their formation . How do they differ from formation conditions of giant deposits?

Geochronology, geochemistry and isotope tracing of the Oligocene magmatism of the Buchim–Damjan–Borov Dol ore district: Implications for timing, duration and source of the magmatism

“…Although the mine at Buchim has been known since ancient times, it was not explored in detail until the 1970's . Since 1979, 80 Mt of the 120 Mt estimated reserves have been mined, with an average ore grade of 0.34% Cu and 0.35 g/t Au (Cifliganec, 1993;Serafimovski et al, , 2010Volkov and Serafimovski, 2010). The deposit consists of four ore bodies, of which three are related to porphyry fingers and one is suggested to represent supergene mineralization (Cifliganec, 1993;Serafimovski et al, 2010;Volkov and Serafimovski, 2010).…”

“…Since 1979, 80 Mt of the 120 Mt estimated reserves have been mined, with an average ore grade of 0.34% Cu and 0.35 g/t Au (Cifliganec, 1993;Serafimovski et al, , 2010Volkov and Serafimovski, 2010). The deposit consists of four ore bodies, of which three are related to porphyry fingers and one is suggested to represent supergene mineralization (Cifliganec, 1993;Serafimovski et al, 2010;Volkov and Serafimovski, 2010). The intrusions are of andesitic to trachyandesitic composition with intrusion ages ranging between 27.5 and 24.9 Ma (K/Ar whole rock ages) (Cifliganec, 1993;Serafimovski et al, 2010).…”

Geochemical hunting of lithogenic and anthropogenic impacts on polymetallic distribution (Bregalnica river basin, Republic of Macedonia)

“…[20] The most important Macedonian metal deposits are related to the regional magmatic activity that occurred in the southern parts of the Carpato-Balkanides during the Eocene-Pliocene. [21,22] The Zletovo mine is located near the town of Probi stip. As presented by Serafimovski et al the mineralization of this deposit is related to the Tertiary calc-alkaline magmatic rocks (dacites and andesites) and it is found in a dacitic volcano-sedimentary suite that had been altered to clays and micas.…”

Morphological and chemical characteristics of the placer gold deposits from Meckin Dol, locality of Borov Dol, eastern Macedonia

“…Numerous interesting mineralizations of Cu, Fe, Pb-Zn as well as Au mineralizations are related to this magmatism. The geological structure (Figure 1) of the Borov Dol deposit, which is quite complex, contains Paleogene, Neogene and volcanogenic-sedimentary and volcanic rocks [11], [17], [12]. (Denkovski, 1995, supplment, Stefanova, 2005 Andesites in turn, depending on the degree of change and ore amount are divided into: propilytized andesites, hydrothermally altered andesites, hydrothermally altered and mineralized andesites and andesite lava.…”

“…Contributions to these numerous studies are presented in the works of [6], [4], [11], [17], [2], [13], [14], [15], [19], [12]. The results of these tests instigated prospection research with detAuthor's address: Violeta Stefanova, University Goce Delčev, Faculty of Natural and Technical Sciences Štip, Goce Delčev 89…”