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Zmienność dolnocechsztyńskiej mineralizacji kruszcowej w sąsiedztwie stref uskokowych w złożu miedziowo-srebrowym Radwanice–Gaworzyce

Chmielewski Andrzej, Głuszyński Andrzej, Oszczepalski Sławomir, Kuczak Artur

Przegląd Geologiczny

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2019

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Vol. 67, nr 3

147--153

EN

The characteristic of ore mineralization in the immediate vicinity of fault zones in the Lower Zechstein deposits is shown. All presented outcomes are on the basis of rock material taken from mining profiles in the Radwanice-Gaworzyce deposit area. During conducted studies ore minerals and oxide minerals were identified under optical microscope in reflected light and photographic documentation of the examined samples was undertaken. In addition, microprobe examination was carried out for selected samples from the studied profiles along with calculations of the chemical composition of individual ore minerals. In all analyzed profiles, Rote Fäule oxidized zone (enriched with hematite) was found, which occurs at various levels of the Kupferschiefer series and the reduced zone (enriched with ore minerals) over the oxidized series. The redox front cuts across the boundaries oflithostratigraphic units, moving from the Weis- liegend to the higher parts of the Zechstein Limestone. The primary ore mineralization in the examined profiles is the chalcocite-digenite association with subordinate bornite and covelitte recorded in the reduced series. Furthermore, the secondary sulphide mineralization in the direct vicinity of tectonic deformation and faults superimposed on primary ore mineralization and hematite enrichments is observed and it is represented by chalcopyrite, bornite, tennantite, tetrahedrite and pyrite, both within reduced and oxidized zones.

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Geochemiczno-mineralogiczne badania koncentracji pierwiastków rzadkich i towarzyszących w obrębie mineralizacji kasyterytowo-siarczkowej w paśmie łupkowym Starej Kamienicy w Sudetach Zachodnich – wyniki wstępne

Małek Rafał, Mikulski Stanisław, Z.

Przegląd Geologiczny

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2019

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Vol. 67, nr 3

179--182

EN

Abstract. The main task of research was to quantitatively and qualitatively identify rare and associated elements that occur within a cassiterite-sulphide mineralization zone hosted Precambrian - Lower Paleozoic metamorphic rochi in the Stara Kamienica schist belt making up the part of the Izera-Karhonosze Massif. Over 70 samples from archive boreholes and abandoned Sn-ore mines were examined using modern methods like portable pXRF, geochemical analysis (ICP-MS, WD-XRF, GF-AAS), polarizing microscopy, electron microprobe analysis (EMPA) and scaning electron microscopy with EDS system (SEM-EDS). Preliminary results show interesting concentrations of associated elements such as Zn (max 0.56%), Pb (max 0.7%), Cu (max 0.33%), As (max 0.55%), and some rare elements like In, Re, Nb, Co, Bi, Pt, V, La and Ce.

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Mineralizacja kruszcowa Cu-Mo typu porfirowego w rejonie Doliny Będkowskiej na Wyżynie Krakowsko-Częstochowskiej

Małek R.

Przegląd Geologiczny

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2018

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Vol. 66, nr 4

252--258

EN

Signs of mineralization were found in historical boreholes of the Będkowska Valley region within granodiorites, porphyry dykes and mostly in country rocks, which are represented chiefly by Ediacaran meta-mudstones and meta-claystones. Sulphide mineralization of epigenetic character and hydrothermal origin is represented mainly by pyrite, chalcopyrite, molybdenite, sphalerite and galena, which appear as both impregnations and quartz, quartz-feldspar, quartz-carbonate and quartz-chlorite veinlets. Both clastic and magmatic rocks are marked by numerous metasomatic alterations like sericitization, biotitization, feldspatization, pyritization and chloritization.

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Mineralizacja kruszcowa w odkrywczym otworze Sieroszowice S-1 w świetle nowych badań

Oszczepalski S., Chmielewski A.

Przegląd Geologiczny

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2017

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Vol. 65, nr 5

321--338

EN

Sieroszowice S-1 borehole was drilled by the Geological Institute under the drilling program conducted by Jan Wyżykowski in the previously unexplored central part of the Fore-Sudetic Monocline, contributing to the discovery of the largest European copper ore deposit. The Zechstein copper-bearing series was reached on 23 March 1957, with the ore mineralization interval at a depth of 656.30-658.26 m. Detailed results of chemical analyses and petrographic investigation were included in the ore deposit geological documentation compiled in 1959, but new research methods currently applicable enable the complementary studies to acquire new results. New findings are based on compilation of reflected-light microscopy, CAMECA SX100 electron microprobe studies and LEO scanning electron microscope observations. As a result of the supplementary research, the qualitative and quantitative composition of ore minerals along with the indication of their chemical composition in microprobe studies as well as their distribution in the ore-mineralized interval are presented in detail in this paper. Ore mineralization occurs in the shale-carbonate series and it is generally represented by sulphides of Cu-Fe-S system (chalcopyrite, bornite), accompanied by digenite and covellite, occasionally geerite and spionkopite, but one of the ore intervals is dominated by chalcocite associated with bornite. Pyrite, galena and sphalerite commonly accompany copper sulphides, especially in the uppermost part of the copper-bearing series. A few previously unidentified minerals, such as native silver, silver amalgams, and clausthalite have also been identified. The Weissliegend is characterized by oxidative alteration, typical for the Rote Fäule pattern, and contains only relict sulphide mineralization represented by minor chalcopyrite and pyrite locally corroded by hematite. It displays an elevated concentration of gold as well.