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Chelopech high-sulphidation epithermal (Cu-Au) deposit with its wellcharacterized hydrothermal footprint is a perfect object to test whether the geochemical features of alunite could be used as a reliable exploration tool. ... aluminium phosphate-sulphate minerals, alunite, rutile/anatase and pyrite. Based on cross-cutting relationships and ...

X-ray photoelectron spectroscopy test showed that after ammonium oxalate treatment, the O 1s content on the surface of pyrite decreased from 44.03% to 26.18%, and the S 2p content increased from ...

Chelopech is an underground gold, copper and silver mine, which currently produces a copper concentrate with metal recoveries averaging 55%, 85% and 42%, respectively. ... Pyrite production ...

The Sichuan-Yunnan-Guizhou (SYG) Pb-Zn triangle in southwestern China is located in the southwest margin of the Yangtze platform (Fig. 1), and representing one of the largest Pb-Zn metallogenic belts in the world containing>500 Pb-Zn deposits (Tan et al., 2019).Several studies of these deposits have been done on deposit geology, …

History of Chelopech Mine The mining operations at Chelopech began in 1954. Until 1990, the concentrates from Chelopech used to be transported to the Pirdop smelter towards the east of Chelopech. In 1992, the mine was placed on care and maintenance. In 1993, Navan became the owner and operated the mine until 2002.

Hydrothermal alterations of the rocks of the Senonian volcanic complex at the gold–copper–pyrite deposit of Chelopech near Pirdop. Bull. Geol. Inst., 13 (1969), p. 125 (in Bulgarian with English abstract) Google Scholar. Mutafchiev and Petrunov, 1996. Mutafchiev, I., Petrunov, R., 1996. Geological genetic models of ore-deposit formation in ...

The Chelopech deposit is a part of the Elatsite–Chelo-pech ore field and is hosted in Upper Cretaceous vol- ... (30–60%), pyrite (10–30%), alunite and alu-minium phosphate-sulphate (APS) minerals (2–10%), minor sericite (muscovite) and anatase. Pyrophyllite, diaspore and, rarely, zunyite have been documented

Geological structure of gold-copper deposit Chelopech is shortly discussed and new data for mineral composition of Western sector in the newly found ore bodies in blocks 151 and 149.

TORONTO, ONTARIO--(Marketwire - Sept. 10, 2012) - Dundee Precious Metals Inc. ()() ("DPM" or "the Company") is pleased to announce that it has today filed a National Instrument 43-101 - Standards of Disclosure for Mineral Projects technical report (the "Report") on Sedar at on its Chelopech Pyrite Recovery Project, …

The concentrations of trace elements in pyrite from blocks 8, 19-SE, 19-NW, 19-NE, 19-SW, 103-W, 103-E, 144, 146, 147, 149-south, 150, and 151 of copper-gold high sulphidation Chelopech deposit ...

propylites in the Chelopech copper-pyrite . deposit (Bulgaria). Review of the Bulgarian . Geological Society, 30, 3, 251-267 (in Russian . with English abstract) Ripp GS, Kanakin SV, Shcherbakova ...

The Agreement provides for the purchase by XGC of up to 200,000 tonnes per year of pyrite concentrate from Chelopech Mining EAD, a wholly-owned subsidiary …

The Chelopech deposit, Panagyurishte district, Bulgaria, is one of the largest gold-producing mines in Europe, with estimated reserves of over 2.66 ... In the proposed scenario, a desulfurization plant would be installed downstream to re-float the non-valuable reactive pyrite. The reactive pyrite concentrate would be combined with the CPB ...

The industrial use of NH4HCO3 as an activator of lime-depressed pyrite is a possible alternative for sulfuric acid replacement as a most widely used pyrite activator. …

The Chelopech epithermal high-sulfidation deposit is located in the Panagyurishte ore district in Bulgaria, which is defined by a NNW alignment of Upper Cretaceous porphyry–Cu and Cu–Au ...

Three successive mineralisation stages have been recognised at Chelopech, including an early iron- sulphur stage consisting mainly of disseminated and massive pyrite, a …

The Cu-Au deposit of Bor (Serbia) represents a continuum of mineralization styles, from porphyry-style ore occurring in quartz-magnetite-chalcopyrite veins and chalcopyrite disseminations to high-sulfidation epithermal Cu-Au ores in pyrite-chalcopyrite and anhydrite-sulfide veins. Decisive for the great economic importance of Bor is the …

In 2022, the Chelopech mine produced 179,100 oz. of gold and 30.8 million lb. of copper in concentrate from processing 2.1 million tonnes of ore. Share Mining.com Recommends.

The Chelopech hydrothermal system is genetically related to a multi-phase 91.9±0.2 Ma old dioritic shallow intrusive system which extends at least over an area of 5 by 4 kilometres and hosts various types of mineralization, including (1) the economically most important high-sulfidation style gold-copper mineralization in the Chelopech mine ...

The pre;ore hydrothermal alteration and the ore mineral assemblage of the Chelopech deposit are typical of high;sulphidation epi; thermal systems, including a locally developed early stage of banded massive pyrite that is typically described in hydrothermal sedimen; tary;diagenetic environments. Fig. 8.

/dickite, pyrite, APS minerals, Fig. 4), grading into phyllic (quartz–sericite), and distal propylitic. At ... Cross-section through the Chelopech deposit based on surface and underground mapping, extensive drillcore descriptions and observations, and including information from Popov and Kovachev (1996) for the north-western part at ...

A new insight into the way in which the mineralogical composition and texture (liberation) of sulfides govern the geochemical behavior of the tailings in terms of acid mine drainage (AMD) generation is presented. Two samples were taken from Dundee Precious Metals Chelopech (DPM-Ch) tailings management facility (TMF).

The Elatsite–Chelopech ore field in the northern part of the Panagyurishte district in Central Bulgaria comprises numerous spatially associated porphyry copper and epithermal gold deposits and prospects. In addition to the mineralization and alteration features, trace elements, lead and sulfur isotope signatures of sulfide minerals from …

Native gold is an important economic component of the complex ores of the Chelopech high-sulphidation volcanic-hosted epithermal Au–Cu deposit (Bulgaria). The ore consists of pyrite, chalcedonic silica, chalcopyrite, enargite, luzonite, tennantite, bornite, sphalerite, galena, and numerous other sulphide, arsenide and telluride minerals. Gold …

Chelopech Mineral Reserves are based on an NSR cut-off value of $1,400 per oz. for gold, $17 per oz. for silver, and $2.75 per lb. for copper plus a profit margin of $10 per tonne.

The concentrations of trace elements in enargite-luzonite from blocks 8, 19-SE, 19-NW, 19-NE, 19-SW, 103-W, 103-E, 144, 146, 147, 149-south, 150, and 151 of copper-gold high sulphidation Chelopech deposit were determined by LA-ICP-MS. It was found that the enargite-luzonites from the individual blocks are enriched in different …

Pyrite from Fairview has a complex multi-stage paragenesis, reflected as a high Co-Ni-Se ± Bi interior surrounded by a high Au-As-Ag-Cu-Sb-Pb-Bi-Co-Ni rim (Fig. 1).The innermost zone of the core is depleted in Co and Ni (i.e., <10 ppm), but both elements increase and decrease together in oscillating bands of high Co-Ni (~1000 ppm) …

Minor quartz-pyrite veins are found throughout. Gangue in the Batopiias ores is calcite and is associated with small amounts of sphalerite, galena, and laumontite. Cobalt-nickel arsenides and ruby silvers have been reported, but their presence is not confirmed by this investigation. ... The Chelopech high-sulphidation epithermal Cu–Au deposit ...

Preliminary Economic Assessment on Pyrite Recovery Project Supports Potential to Increase Chelopech Metal Recoveries to 90%