Secondary uranyl arsenates-phosphates and Sb-Bi-rich minerals of the segnitite-philipsbornite series in the oxidation zone at the Prakovce-Zimná Voda REE-U-Au quartz vein mineralization, Western Carpathians, Slovakia

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F23%3A10136230" target="_blank" >RIV/00023272:_____/23:10136230 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.cambridge.org/core/journals/mineralogical-magazine/article/secondary-uranyl-arsenatesphosphates-and-sbbirich-minerals-of-the-segnititephilipsbornite-series-in-the-oxidation-zone-at-the-prakovcezimna-voda-reeuau-quartzvein-mineralisation-western-carpathians-slovakia/8977B2409512DA26CBE280033F77118A" target="_blank" >https://www.cambridge.org/core/journals/mineralogical-magazine/article/secondary-uranyl-arsenatesphosphates-and-sbbirich-minerals-of-the-segnititephilipsbornite-series-in-the-oxidation-zone-at-the-prakovcezimna-voda-reeuau-quartzvein-mineralisation-western-carpathians-slovakia/8977B2409512DA26CBE280033F77118A</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1180/mgm.2023.75" target="_blank" >10.1180/mgm.2023.75</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Secondary uranyl arsenates-phosphates and Sb-Bi-rich minerals of the segnitite-philipsbornite series in the oxidation zone at the Prakovce-Zimná Voda REE-U-Au quartz vein mineralization, Western Carpathians, Slovakia

Popis výsledku v původním jazyce

In this work, we studied the assemblages of supergene minerals of the hydrothermal REE-U quartz vein mineralization at the Prakovce, Zimná Voda site. Chemically heterogeneous uranyl arsenates and minor phosphates of the autunite group (nováčekite, kahlerite, threadgoldite, autunite, arsenuranospathite and chistyakovaite) together with scorodite and Sb-Bi-rich philipsbornite-segnitite series formed by oxidising fluids during decomposition and leaching of primary hypogene uraninite, brannerite and base-metal sulfides and sulfosalts. Progressive change of pH from acidic to near-neutral due to the gradual consumption of sulfides resulted in formation of late phosphuranylite, pharmacosiderite, and arseniosiderite. Goethite and other Fe oxides represent the latest hydrous ferric mineral phases and were formed after the most of As was already fixed in Fe arsenates. Antimony and Bi were taken up exceptionally into philipsbornite-segnitite only and suggest unusual conditions during their uptake. X-ray absorption spectroscopy indicates that Sb in the philipsbornite-segnitite is fully oxidized (0.1-0.4 apfu Sb5+, octahedral coordination on G site). Pentavalent Sb together with a presence of ferric oxides and arsenates and uranyl minerals suggest oxidative conditions during weathering. This study also indicates that hydrous ferric arsenates are dominant and stable secondary minerals in a supergene environment in the quartz vein rich in Fe and As accompanied by elevated concentrations of U, Pb, Sb, Bi, S, P, Ca and Ba under oxidizing conditions.

Název v anglickém jazyce

Secondary uranyl arsenates-phosphates and Sb-Bi-rich minerals of the segnitite-philipsbornite series in the oxidation zone at the Prakovce-Zimná Voda REE-U-Au quartz vein mineralization, Western Carpathians, Slovakia

Popis výsledku anglicky

In this work, we studied the assemblages of supergene minerals of the hydrothermal REE-U quartz vein mineralization at the Prakovce, Zimná Voda site. Chemically heterogeneous uranyl arsenates and minor phosphates of the autunite group (nováčekite, kahlerite, threadgoldite, autunite, arsenuranospathite and chistyakovaite) together with scorodite and Sb-Bi-rich philipsbornite-segnitite series formed by oxidising fluids during decomposition and leaching of primary hypogene uraninite, brannerite and base-metal sulfides and sulfosalts. Progressive change of pH from acidic to near-neutral due to the gradual consumption of sulfides resulted in formation of late phosphuranylite, pharmacosiderite, and arseniosiderite. Goethite and other Fe oxides represent the latest hydrous ferric mineral phases and were formed after the most of As was already fixed in Fe arsenates. Antimony and Bi were taken up exceptionally into philipsbornite-segnitite only and suggest unusual conditions during their uptake. X-ray absorption spectroscopy indicates that Sb in the philipsbornite-segnitite is fully oxidized (0.1-0.4 apfu Sb5+, octahedral coordination on G site). Pentavalent Sb together with a presence of ferric oxides and arsenates and uranyl minerals suggest oxidative conditions during weathering. This study also indicates that hydrous ferric arsenates are dominant and stable secondary minerals in a supergene environment in the quartz vein rich in Fe and As accompanied by elevated concentrations of U, Pb, Sb, Bi, S, P, Ca and Ba under oxidizing conditions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10504 - Mineralogy

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Mineralogical Magazine

ISSN

0026-461X

e-ISSN

—

Svazek periodika

87

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

849-865

Kód UT WoS článku

001127800900001

EID výsledku v databázi Scopus

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