Temat: native silver - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: SEM studies of ore minerals in skarns from Garby Izerskie, Karkonosze-Izera block, south-western Poland
Autorzy:: Rybicki, M.
Karwowski, Ł.
Banasik, K.
Powiązania:: https://bibliotekanauki.pl/articles/100745.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Śląski. Wydział Nauk o Ziemi
Tematy:: Karkonosze
SEM
bizmut
Garby Izerskie
bismuth telluride
acanthite
native bismuth
native gold
native silver
skarns
Opis:: In “Stanisław” quarry, that is located on Garby Izerskie, ore minerals-bearing calcsilicate skarns were found in 2009. The samples were studied using microscopical method of reflected light and scanning electron microscopy (SEM). Based on SEM study, the predominant ore minerals in investigated samples are chalcopyrite, pyrrhotite, bismuth telluride and native bismuth. Moreover, acanthite, native gold and native silver were also identified. Our studies are the first report of above mentioned minerals from the Garby Izerskie area.
Źródło:: Contemporary Trends in Geoscience; 2013, 2, 1; 61-66
2299-8179
Pojawia się w:: Contemporary Trends in Geoscience
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Native silver in the eastern part of the Karkonosze granitoid pluton, Lower Silesia, Poland
Autorzy:: Kozłowski, Andrzej
Matyszczak, Witold
Powiązania:: https://bibliotekanauki.pl/articles/27323964.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: native silver
fluid inclusions
granitoid
Karkonosze pluton
srebro rodzime
inkluzja fluidalna
granitoidy
pluton Karkonoszy
Opis:: This article describes silver specimens of the size of tenths to a few millimetres, found in small pegmatites and quartz veinlets of the porphyritic granitoid area in 22 sites in the eastern part of the Variscan granitoid Karkonosze pluton, from 20 of which native silver occurrences were previously not known. The sites are scattered on the whole surface of the granitoid. The native silver occurred in wire, rod, platy, dendritic, anhedral granular and euhedral cubic and octahedral habits; in some specimens twins and fenster faces were also found. Associated with native silver small amounts of acanthite crystallized commonly, sometimes apparently formed by sulphur diffusion into silver. Inclusions of native gold, electrum, galena, chalcopyrite and pyrite occurred in the native silver. The parent fluids of the specimens were epithermal, because the homogenization temperature (Th) of inclusions in quartz, calcite and cleavelandite that were the host minerals of the native silver was generally 91–165ºC and for individual samples the Th range was 4–11ºC. The total salinity of the fluid was 2.4–7.2 wt. % with Na and Ca (hydro)carbonates as the main dissolved components and admixtures of K, Mg, Fe, Al, S, Cl and F. The parent granitoid contains Ag in trace amounts (0.034–0.056 ppm) and was probably the source of this element for the crystals of native silver. Migration of Ag was made easier by the presence of fluoride ions in fluids.
Źródło:: Acta Geologica Polonica; 2023, 73, 2; 223--245
0001-5709
Pojawia się w:: Acta Geologica Polonica
Dostawca treści:: Biblioteka Nauki

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