Indium-copper-rich sphalerite from the Restauradora vein, Capillitas, Catamarca, Argentina

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F24%3A10168916" target="_blank" >RIV/00025798:_____/24:10168916 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/24:10487086

Result on the web

<a href="https://doi.org/10.1111/rge.12325" target="_blank" >https://doi.org/10.1111/rge.12325</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/rge.12325" target="_blank" >10.1111/rge.12325</a>

Result language

angličtina

Original language name

Indium-copper-rich sphalerite from the Restauradora vein, Capillitas, Catamarca, Argentina

Original language description

The Restauradora vein, is one of the 20 veins of Capillitas (27 degrees 27 &apos; S, 66 degrees 30 &apos; W), an epithermal precious- and base-metal vein deposit belonging to the Farallon Negro Mining District, northwestern Argentina. One of the main minerals of the paragenesis of Restauradora vein is sphalerite, showing a large substitution of Zn by In and Cu with small participation of Cd and Fe; the fluctuating Zn composition ranges from 0.99 to 0.49 apfu, while In and Cu ranges (apfu) are: 0.22-0.27 and 0.21-0.25, respectively. Under the polarizing-light microscope, using reflected light, the optical properties are those of sphalerite, but with decreasing contents of Zn, especially when Zn is &lt;= 0.60 apfu, a new variety differentiates from regular sphalerite and develops ribbons with paler colors, higher reflectance, softer relative hardness and no internal reflections. The main reflectance values of this In-Cu-rich sphalerite are (Rair, lambda/nm): 20.55, 470; 19.43, 546; 19.02, 589; and 18.42, 650. The strongest five x-ray powder-diffraction lines of the synthetic analogue [d in angstrom (I) (hkl)] are: 3.173 (100) (111); 1.943 (54) (202); 1.657 (37) (113); 1.122 (22) (224); 1.261 (19) (133), the space group is F-43m, with a = 5.49692(10) angstrom, V = 166,100(10) angstrom 3, Z = 4. Electron-microprobe analyses of the In-Cu-rich sphalerite grains (n = 10) give an average composition (wt%) of: S 29.51, Zn 31.03, In 24.89, Cu 13.49, Ga 0.96, Cd 0.54, Fe 0.05; the average (n = 7) chemical composition of the synthetic phase is: S 29.67, Zn 30.32, In 25.94, Cu 13.82. Despite of the differences, and given that Zn is the main cation and that the structure is the same as that of sphalerite, the mineral studied here is considered as the richest In-Cu variety of sphalerite in the world. Restauradora vein, is one of the 20 veins of Capillitas (27 degrees 27 &apos; S, 66 degrees 30 &apos; W), an epithermal precious- and base-metal vein deposit belonging to the Farallon Negro Mining District, northwestern Argentina. One of the main minerals of the paragenesis of Restauradora vein is sphalerite, showing a large replacement of Zn by In and Cu with small participation of Cd and Fe; the fluctuating Zn composition ranges from 0.99 to 0.49 apfu, while In and Cu ranges (apfu) are: 0.21-0.25 and 0.24-0.27, respectively. Under the polarizing-light microscope, using reflected light, the optical properties are those of sphalerite, but with decreasing contents of Zn, especially when Zn is &lt;= 0.60 apfu, a new variety differentiates from regular sphalerite and develops ribbons with paler colors, higher reflectance, softer relative hardness and no internal reflections. Electron-microprobe analyses of the In-Cu-rich sphalerite grains (n = 10) give an average composition (wt%) of: S 29.51, Zn 31.03, In 24.89, Cu 13.49, Cd 0.54, Fe 0.05; the average (n = 7) chemical composition of the synthetic phase is: S 29.67, Zn 30.32, In 25.94, Cu 13.82. Despite of the differences, and given that Zn is the main cation and that the structure is the same as that of sphalerite, the mineral studied here is considered a variety of sphalerite, rich in indium and copper.image

Czech name

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Czech description

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Type

J_imp - 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

Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2024

Confidentiality

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

Name of the periodical

Resource Geology

ISSN

1344-1698

e-ISSN

1751-3928

Volume of the periodical

74

Issue of the periodical within the volume

1

Country of publishing house

JP - JAPAN

Number of pages

13

Pages from-to

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UT code for WoS article

001143919400001

EID of the result in the Scopus database

2-s2.0-85182701454