Wyniki wyszukiwania - BazTech

1

Minerały wtórne z kopalni Breiner (Maramureş, Rumunia) jako przykład tworzącej się współcześnie mineralizacji wtórnej

Januszewska Anna, Kruszewski Łukasz, Siuda Rafał

Przegląd Geologiczny

|

2023

|

Vol. 71, nr 4

174--178

EN

The former gold and silver mine of Breiner, is located in the village of Băiuţ, in the mining area of Băiuţ-Tibleş (Maramureş, Romania). The local polymetallic occurrences are characterized by a rich sulfide (Cu, Pb, Zn sulfides/sulfosalts) and arsenic mineralization. While the primary mineralization is relatively well known, the diverse paragenesis of second- ary mineralization has never been the subject of detailed research. Based on diffraction studies, several species of weathered minerals have been identified, most of which have never been reported in the study area before. The dominant minerals in the mine belong to the melanterite and halotrichite groups. The occurrence of rare phases on a global scale has also been observed - zaherite Al12(SO4)5(OH)26 20H2O, tooeleite Fe6(AS3+O3)4(SO4)(OH)44H2 and wattevilleite - a species with uncertain chemistry, possibly Na2Ca(SO4)24H2O. The formation of these parageneses is related to currently occurring weathering processes of primary ore mineralization that undergoes decomposition under low pH conditions.

2

Wybrane zagadnienia biomineralogii

Pawlikowski Maciej

Przegląd Geologiczny

|

2022

|

Vol. 70, nr 11

834--839

EN

Biomineralogy is the science between mineralogy, biology, medicine and biochemistry. It is focused on problems concerning mineralization of tissue and organs of human, animals and flora. It concerns interaction between mineral and biological tissue, as well as between biochemical components of living organism. These processes are important for good functioning of organs and human life.

3

Recently formed arsenates from an abandoned mine in Radzimowice (SW Poland) and the conditions of their formation

Siuda Rafał, Januszewska Anna

Acta Geologica Polonica

|

2022

|

Vol. 72, no. 4

423--442

EN

In the mining galleries of the abandoned Au-As mine in Radzimowice, diverse groups of secondary arsenates crystallized recently. They form several characteristic assemblages. In the first of them the typical minerals are bukovskýite and melanterite. The second group of secondary arsenates includes scorodite, kaňkite, zýkaite, and pitticite. The third assemblage includes Co-Ni-Mg arsenates of the erythrite-annabergite-hörnesite series. The first assemblage crystallized in a zone with a very high activity of sulphate and arsenate ions and where the pH varies within a narrow range of 2.0-3.5. The second group of secondary arsenates formed in the acidic zone. The minerals identified here suggest pH variation within fairly wide ranges, from about 2.0 to 5.5. Contrary to the first and second mineral assemblage, the Co-Ni-Mg arsenates formed under different geochemical conditions. Their crystallization took place under weak acidic to neutral conditions.

4

Wstępne wyniki badań geochemicznych i mineralogicznych stref wietrzenia złoża cynku i ołowiu (obszar śląsko-krakowski)

Swęd Maciej

Przegląd Geologiczny

|

2019

|

Vol. 67, nr 3

198--199

EN

The study area is located within the Silesia-Cracow zinc-lead ore district. Secondary minerals were collected from the reclaimed zinc-lead underground mine in Bolesław and from the currently operated zinc-lead underground mine Olkusz-Pomorzany. The main goal of investigations was the geochemical and mineralogical comparison of weathering zone developed within horst and tectonic graben. Semi-quantitative chemical composition was determined using the SEM-EDS method and quantitative chemical composition was determined employing the EMP microanalysis. Mineralogical investigations were performed with the XRD. The predominant zinc mineral of weathering zone located within tectonic horst is hemimorphite. No primary and secondary lead minerals were observed in this zone. In contrast, the weathering zone within tectonic graben contains secondary carbonate zinc and lead minerals. These differences could result from pervasive sulfide minerals (especially marcasite) in a graben unit, and limestones which are the main gangue rock of this zinc-lead ore.

5

Analysis of Distribution of Secondary Minerals and their Associations on The Surface of Diamonds and in Derrivative Products of Metasomatically Altered Kimberlites

Dvoichenkova Galina, Chanturiya Valentin, Morozov Valery, Podkamenny Yury, Kovalchuk Oleg

Inżynieria Mineralna

|

2019

|

R. 21, nr 1

43--46

EN

The theoretical and experimental studies resulted in establishing regularities in the distribution of secondary minerals and their associations in metasomatically altered diamond-bearing kimberlites and products of their processing. Based on integrated mineralogical research, it was found out that the composition of the altered kimberlites and the fine-dispersed clayey slurries formed during their processing constituted the basis of hydrophilic formations on the surface of diamond crystals not recovered by the methods of grease and froth separation. Particles of these minerals concentrate in fine-dispersed slurry products of kimberlite ore processing, interact with the crystal surface, reduce their hydrophobic properties and, accordingly, recovery in processes of grease and froth separations into concentrates.

PL

Przeprowadzono analizę teoretyczną i badania eksperymentalne w celu ustalenia prawidłowości w rozkładzie minerałów wtórnych i ich związków w metasomatycznie zmienionych diamentach kimberlitowych i produktach ich przetwarzania. Na podstawie zintegrowanych badań mineralogicznych stwierdzono, że zmienione kimberlity i drobnoziarniste produkty ich metamorfozy stanowiły hydrofilowe formacje na powierzchni kryształów diamentu, które nie zostały odzyskane metodami flotacji pianowej. Cząstki tych minerałów koncentrują się w drobno zdyspergowanych produktach przerobu rudy kimberlitowej, oddziałują z powierzchnią kryształu, redukują ich właściwości hydrofobowe i odpowiednio przechodzą w procesach flotacji do koncentratów.

6

Oxygenic bismuth minerals in the NE part of the Karkonosze pluton (West Sudetes, SW Poland)

Kozłowski A., Matyszczak W.

Acta Geologica Polonica

|

2018

|

Vol. 68, no. 4

537--554

EN

The study presents fifteen oxygen-bearing secondary minerals of bismuth from the north-eastern part of the Variscan Karkonosze granitoid pluton in the northern zone of the Bohemian massif. The minerals were investigated by optical, electron microprobe, classic chemical, XRD, IR absorption and fluid inclusion methods. The late, very low temperature epithermal solutions most probably caused formation of sillénite, kusachiite, bismoclite, bismutite, beyerite, kettnerite, pucherite, schumacherite, namibite and eulytite. Solutions dominated by supergene (meteoric) waters were the parents for bismite, russellite, koechlinite, ximengite and walpurgite. The paper also contains information on early research on the investigated minerals.

7

Paragenezy hipergeniczne złoża Radzimowice (Góry Kaczawskie)

Siuda R.

Przegląd Geologiczny

|

2012

|

Vol. 60, nr 8

442--449

EN

The polymetallic Radzimowice deposit is located in the vicinity ofRadzimowice village, about 20 km east of Jelenia Góra (Western Sudetes, Poland). The deposit consists of several ore veins. The primary ore assemblage is represented by arsenopyrite, pyrite and chalcopyrite, and less common galena, sphalerite, Cu-Pb-Sb sulphosalts of Cu andPb, and native gold. The mining activity in this area started in the mid-12th century and lasted until the mid-20th century. This paper presents general information about typical parageneses of secondary minerals occurring in the oxidation zone of the Radzimowice deposit. Based on the mineralogical investigations, 43 secondary mineral species have been recognized. Such a rich assemblage of secondary minerals makes the oxidation zone one of the most interesting formations of this kind in Poland. Phosphates (pseudomalachite, phosphosiderite) and sulphides (covellite, chalcocite) of copper were ascertained in the near-surface part of the supergene zone. Secondary lead minerals (cerussite, pyromorphite and mimetite) were found only in medieval dumps. Phosphates and sulphides of Cu and supergene lead minerals belong to sub-recent secondary parageneses. Since the end of local mining activity in 1957, the intensive weathering processes caused the decomposition of ore minerals in the mine galleries, producing recently forming associations of new minerals. The first mineral paragenesis is represented by recently formed arsenates. Kankite, scorodite and zykaite are the most widespread constituents of this assemblage. Large accumulations ofpitticite, forming stalagmites up to 10 cm in length, are sometimes found in old mine galleries. In those parts of the abandoned mine, where pyrite is a dominant primary mineral, huge accumulations of the minerals related to acid mine drainage are present. Schwertmannite, ferrihydrite and poorly crystalline goethite are the main representatives of this paragenesis. Associations of basic copper sulphates are present in all parts of the abandoned mine. Langite, posnjakite, brochantite and devilline are the most common minerals of this assemblage. Sulphates of Cu and Al (chalcoalumite and cyanotrichite), native copper, cuprite and malachite are locally found to coexist with these phases. Precipitations of secondary minerals play an important role in the retention and liberation of considerable amounts of toxic elements. Dissolution ofthese phases can result in the release ofarsenic and heavy metals into the groundwater and in the migration ofthese elements into the environment.

8

Nowe dane o minerałach wietrzeniowych złoża Miedzianka-Ciechanowice w Rudawach Janowickich (Dolny Śląsk, Polska)

Siuda R., Gołębiowska B.

Przegląd Geologiczny

|

2011

|

Vol. 59, nr 3

226-226

EN

The abandoned deposit of polymetallic ore in Miedzianka-Ciechanowice is located in the northern part of the Kowary-Czarnów Unit, within the eastern metamorphic cover of the Karkonosze granite. This deposit is formed mainly of hydrothermal veins related to the Karkonosze granite and Intra-Sudetic Fault. Lenses-forming contact-metasomatic ores are also present. The ore assemblages are rich in Cu, and poor in Pb, Ag, As and Fe. The Miedzianka- -Ciechanowice deposits were mined from the early Middle Ages to the middle of the 20th

9

Środowiskowe uwarunkowania procesów (bio)ługowania metali z odpadów poflotacyjnych rud cynkowo-ołowiowych

Pacholewska M., Cabała J., Cwalina B., Sozańska M.

Rudy i Metale Nieżelazne

|

2007

|

R. 52, nr 6

337-342

PL

Działalność wydobywcza i produkcja koncentratów Pb-Zn prowadzona przez ZGH BOLESŁAW S.A. powoduje powstawanie corocznie ok. 1,5 do 1,6 mln t odpadów poflotacyjnych. Zawierają one znaczne ilości węglanowej skały płonnej (dolomity) oraz metalonośnych minerałów siarczkowych, takich jak: piryt i markasyt, galena, sfaleryt, których koncentracja w odpadach dochodzi do 20 % wagowych. Dynamika procesów uwalniania metali z odpadów, zależy od wielu czynników fizycznych i chemicznych, a także od obecności mikroflory autochtonicznej. Poznanie tych zależności pozwoli na ocenę potencjalnych zagrożeń środowiska. W pracy wykazano, że aktywność metaboliczna utleniających bakterii siarkowych i żelazowych w badanych składowiskach odpadów może prowadzić do przemian fazowych minerałów występujących w odpadach i zwiększenia ładunków metali ciężkich uwalnianych do środowiska. Stężenia metali, w szczególności Cd i Zn w roztworach ługujących pożywek, stymulujące aktywność bakterii siarkowych przewyższają kilkakrotnie lub kilkunastokrotnie poziomy koncentracji metali w pożywkach stymulujących aktywność bakterii żelazowych. Na efektywność (bio)ługowania metali ciężkich (Cd, Pb, Fe, Zn) wywierają wpływ także czynniki abiotyczne, z których istotną rolę odgrywa ustalanie się równowagi kwasowo-zasadowej w obecności alkalicznej skały płonnej.

EN

The mining and production of Zn-Pb concentrates that are conducted by the BOLESŁAW Mine and Metallurgical Plant annually produce approximately from 1.5 to 1.6 m t of flotation tailings. This waste contains aignificant amounts of carbonate gangue (dolomites) and metalliferous sulphide minerals, such as: pyrite and marcasite, galena and sphalerite, whose concentration in the tailings reaches 20 % in terms of weight. The dynamics of metals release from the flotation tailings depends on numerous physical and chemical factors as well as the presence of indigenous microflora. Finding these relations will allow you to estimate potential environmental threats. The paper shows that the metabolic activity of sulphur- and iron-oxidizing bacteria in the examined tailings storages may result in phase transitions of minerals in the flotation tailings and increase in the quantity of heavy metals released into the environment. The concentrations of metals, in particular of Cd and Zn, in leaching solutions of nutrient mediums stimulating the activity of sulphur-oxidizing bacteria exceed the concentrations of metals in leaching solutions stimulating the activity of iron-oxidizing bacteria several times, and more. Finally, abiotic factors also influence the efficiency of heavy metals bioleaching (Cd, Pb, Fe, Zn). Normalization of acid-base balance in the presence of alkaline gangue plays a significant role among these factors.