Mineralogická charakteristika žilné křemenné mineralizace s molybdenitem z lomu Pohled, havlíčkobrodský rudní revír (Česká republika)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F23%3A00142702" target="_blank" >RIV/00216224:14310/23:00142702 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/26232511:_____/23:N0000078

Výsledek na webu

<a href="http://scigeo.actamm.cz/cs/mineralogicka-charakteristika-zilne-kremenne-mineralizace-s-molybdenitem-z-lomu-pohled-havlickobrodsky-rudni-revir-ceska-republika/" target="_blank" >http://scigeo.actamm.cz/cs/mineralogicka-charakteristika-zilne-kremenne-mineralizace-s-molybdenitem-z-lomu-pohled-havlickobrodsky-rudni-revir-ceska-republika/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

čeština

Název v původním jazyce

Mineralogická charakteristika žilné křemenné mineralizace s molybdenitem z lomu Pohled, havlíčkobrodský rudní revír (Česká republika)

Popis výsledku v původním jazyce

A mineralogical study of a poorly mineralized quartz vein with macroscopic molybdenite, cutting biotite paragneisses in the Pohled quarry (Moldanubicum), revealed a very rich mineral assemblage involving 24 species. In addition to quartz (belonging probably to several populations) and molybdenite, we proved the presence of pyrrhotite, pyrite, marcasite, chalcopyrite, cobaltite, arsenopyrite, galena, gustavite, native bismuth, joséite-A, Te-rich zipserite, anatase, brookite, uraninite, coffinite, hydroxylsynchysite-(Ce), baryte, muscovite, chamosite, clinochlore, fluorapatite, K-feldspar, and calcite. Apart from calcite, which fills youngest veinlets cutting the quartz vein, all remaining minerals form small disseminations in a quartz gangue; in some cases, these minerals probably represent components of older quartz-rich veinlets. The textural development and chemical compositions of minerals indicate that temperature decreased significantly during evolution of the vein – from 350–370 °C in early stage to up to 160 °C in the late stage. The Eh and pH of the fluid also experienced significant changes during evolution of the vein. The presence of hardly remobilizable elements in the given mineralization, including W, Sn, Zr, Nb, Th, Ti, Sc, Y, and REEs, suggests that specific complexing ligands (likely fluoride and/or sulphate anions) were present in the fluids. Broad similarities are found when texture and compositions of a number of silicate and sulphide minerals are compared with those from other types of mineralization in the quarry Pohled. This implies for cogenetic nature of various types of hydrothermal mineralizations and continuous evolution of the hydrothermal system, with variable local representation of individual mineralizing stages. The differences in chemical compositions of some minerals can be at least in some cases explained by topomineral influence of host rocks (the local source of Co and Ni in small bodies of amphibolites and serpentinites, source of W and Mo in granitoids).

Název v anglickém jazyce

Mineralogy of molybdenite-bearing quartz vein from Pohled quarry, Havlíčkův Brod Ore District (Czech Republic)

Popis výsledku anglicky

A mineralogical study of a poorly mineralized quartz vein with macroscopic molybdenite, cutting biotite paragneisses in the Pohled quarry (Moldanubicum), revealed a very rich mineral assemblage involving 24 species. In addition to quartz (belonging probably to several populations) and molybdenite, we proved the presence of pyrrhotite, pyrite, marcasite, chalcopyrite, cobaltite, arsenopyrite, galena, gustavite, native bismuth, joséite-A, Te-rich zipserite, anatase, brookite, uraninite, coffinite, hydroxylsynchysite-(Ce), baryte, muscovite, chamosite, clinochlore, fluorapatite, K-feldspar, and calcite. Apart from calcite, which fills youngest veinlets cutting the quartz vein, all remaining minerals form small disseminations in a quartz gangue; in some cases, these minerals probably represent components of older quartz-rich veinlets. The textural development and chemical compositions of minerals indicate that temperature decreased significantly during evolution of the vein – from 350–370 °C in early stage to up to 160 °C in the late stage. The Eh and pH of the fluid also experienced significant changes during evolution of the vein. The presence of hardly remobilizable elements in the given mineralization, including W, Sn, Zr, Nb, Th, Ti, Sc, Y, and REEs, suggests that specific complexing ligands (likely fluoride and/or sulphate anions) were present in the fluids. Broad similarities are found when texture and compositions of a number of silicate and sulphide minerals are compared with those from other types of mineralization in the quarry Pohled. This implies for cogenetic nature of various types of hydrothermal mineralizations and continuous evolution of the hydrothermal system, with variable local representation of individual mineralizing stages. The differences in chemical compositions of some minerals can be at least in some cases explained by topomineral influence of host rocks (the local source of Co and Ni in small bodies of amphibolites and serpentinites, source of W and Mo in granitoids).

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

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OECD FORD obor

10500 - Earth and related environmental sciences

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Musei Moraviae, Scientiae Geologicae

ISSN

1211-8796

e-ISSN

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Svazek periodika

108

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

26

Strana od-do

145-170

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-85176923464