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Mineralogical Setti...
Mineralogical Setting of Precious Metals at the Assarel Porphyry Copper-Gold Deposit, Bulgaria, as Supporting Information for the Development of New Drill Core 3D XCT-XRF Scanning Technology
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- Cioaca, Mihaela-Elena (author)
- Geol Inst Romania, Bucharest 012271, Romania
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- Munteanu, Marian (author)
- Geol Inst Romania, Bucharest 012271, Romania
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- Lynch, Edward P. (author)
- Geol Survey Sweden, Box 670, S-75128 Uppsala, Sweden
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- Arvanitidis, Nikolaos (author)
- Geol Survey Sweden, Box 670, S-75128 Uppsala, Sweden
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- Bergqvist, Mikael (author)
- Orexplore, S-16440 Kista, Sweden
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- Costin, Gelu (author)
- Rice Univ, Dept Earth Environm & Planetary Sci, Keith Wiess Geol Labs, Houston, TX 77005 USA
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- Ivanov, Desislav (author)
- Asarel Medet AD, Panagyurishte 4500, Bulgaria
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- Milu, Viorica (author)
- Geol Inst Romania, Bucharest 012271, Romania
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- Arvidsson, Ronald (author)
- Geol Survey Sweden, Box 670, S-75128 Uppsala, Sweden
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- Iorga-Pavel, Adina (author)
- Geol Inst Romania, Bucharest 012271, Romania
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- Högdahl, Karin (author)
- Uppsala universitet,Mineralogi, petrologi och tektonik
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- Stoilov, Ventsislav (author)
- Asarel Medet AD, Panagyurishte 4500, Bulgaria
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(creator_code:org_t)
- 2020-10-24
- 2020
- English.
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In: Minerals. - : MDPI AG. - 2075-163X. ; 10:11
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Abstract
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- A petrographic investigation of ore samples from the Assarel porphyry copper deposit in the Srednogorie metallogenic zone (Bulgaria) constrains the setting and character of precious metals (Au, Ag, PGE) and related minerals within the deposit. This work supports renewed interest in understanding the deportment of precious metals and provides mineralogical knowledge during the testing and validation of novel drill core 3D X-ray computed tomography-X-ray fluorescence (XCT-XRF) scanning technology being developed as part of the X-MINE project. Scanning electron microscopy-energy dispersive spectrometry (SEM-EDS) results indicate precious metals occur in their native state (Au, Ag), as sulfides (Ag), sulfosalts (Au), tellurides (Ag, Pd), and selenides (Ag), and typically form micron-sized inclusions in pyrite and chalcopyrite or are disseminated in the groundmass of the rock. Preservation of early Fe oxide-chalcopyrite +/- bornite assemblage as relics in the more dominant pyrite-chalcopyrite mineralization assemblage supports mineral disequilibrium relationships and multi-stage mineralization events. Several rare minerals (e.g., merenskyite, acanthite, sorosite, tetra-auricupride, auricupride, greenokite, bismuthinite, nagyagite, native Ni) are reported for the first time at Assarel and highlight the mineralogical diversity of the ore. The occurrence of precious metals and related minerals at Assarel attest to a complex hydrothermal system that underwent progressive physicochemical changes during the evolution of the mineralizing system (e.g., redox conditions, fluid chemistry).
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Keyword
- precious metals
- platinum-group minerals
- Ag-Te-S-Se minerals
- hydrothermal metallogeny
- Assarel
- X-MINE
Publication and Content Type
- ref (subject category)
- art (subject category)
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Minerals
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Cioaca, Mihaela- ...
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Munteanu, Marian
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Lynch, Edward P.
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Arvanitidis, Nik ...
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Bergqvist, Mikae ...
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Costin, Gelu
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Ivanov, Desislav
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Milu, Viorica
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Arvidsson, Ronal ...
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Iorga-Pavel, Adi ...
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Högdahl, Karin
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Stoilov, Ventsis ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geology
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Minerals
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Uppsala University