Synergies in elemental mobility during weathering of tetrahedrite [(Cu, Fe, Zn) 12 (Sb, As) 4S13]: Field observations, electron microscopy, isotopes of Cu, C, O, radiometric dating, and water geochemistry
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F18%3A10134121" target="_blank" >RIV/00023272:_____/18:10134121 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.chemgeo.2018.04.021" target="_blank" >http://dx.doi.org/10.1016/j.chemgeo.2018.04.021</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.chemgeo.2018.04.021" target="_blank" >10.1016/j.chemgeo.2018.04.021</a>
Alternative languages
Result language
angličtina
Original language name
Synergies in elemental mobility during weathering of tetrahedrite [(Cu, Fe, Zn) 12 (Sb, As) 4S13]: Field observations, electron microscopy, isotopes of Cu, C, O, radiometric dating, and water geochemistry
Original language description
Tetrahedrite is commonly present in many ore deposits and may be transferred to mining waste. Here, we describe the behavior of all elements in tetrahedrite during oxidative dissolution in a natural oxidation zone at Piesky (Slovakia), this being a long-term analogue of weathering of tetrahedrite-rich mining wastes. Electron microprobe work identified initial, early, advanced, and mature stages of weathering. The initial stages include formation of secondary covellite and chalcocite, the following stages only oxidic products, divided into greenish masses and brown veinlets. Both of them are nanocrystalline mixtures of minerals. The masses are Cu-Sb-As-rich and consist of a nanocrystalline pyrochlore phase. The veinlets are Fe-Sb-As rich and contain tripuhyite, goethite, and pyrochlores. Quantitative elemental budgets show that some elements (Zn, S, Ni, Co) are rapidly lost whereas others are retained and form copper arsenates in the mature stages of weathering. About 10% As and almost 50% of Sb are lost during weathering, likely released into water; some Sb is stored in secondary minerals such as camerolaite, cualstibite, or tripuhyite. Light carbon isotopic composition (delta C-13 down to -11.1%) document significant biological contribution for C in the secondary minerals. Copper isotopes become progressively heavier during weathering (from initial delta Cu-65 of -2.45 parts per thousand in tetrahedrite up to 4.3 parts per thousand in some azurite samples but -6.3 parts per thousand in covellite and chalcocite), documenting cyclic removal of light copper isotopes into covellite and chalcocite. The observation of elemental synergies during weathering of tetrahedrite shows that the solubility and mobility of As is controlled by copper arsenates, not by iron oxides, in an environment rich in tetrahedrite but poor in pyrite.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10504 - Mineralogy
Result continuities
Project
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Continuities
V - Vyzkumna aktivita podporovana z jinych verejnych zdroju
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Chemical Geology
ISSN
0009-2541
e-ISSN
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Volume of the periodical
488
Issue of the periodical within the volume
červen
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
20
Pages from-to
1-20
UT code for WoS article
000432528200001
EID of the result in the Scopus database
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