Ore paragenesis of the quebrada del diablo lower west gold epithermal deposit, san juan
The Gualcamayo mining district (68°38'26.11“W; 29°43'32.42“S) is located in the Central Precordillera, include the Quebrada del Diablo Main disseminated gold deposit, currently in operation; the Amelia Inés-Magdalena polymetallic skarn deposit, and the Quebrada del Diablo Lower West dissem...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00044822_v74_n3_p407_Dannunzio |
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todo:paper_00044822_v74_n3_p407_Dannunzio2023-10-03T13:59:20Z Ore paragenesis of the quebrada del diablo lower west gold epithermal deposit, san juan D’annunzio, M.C. Rubinstein, N. Gómez, A. Hernández, L.B. Au bearing minerals Central Precordillera Gualcamayo mining district Hydrothermal system evolution Ore mineralogy epithermal deposit gold hydrothermal system mineralization mineralogy mining ore deposit paragenesis petrography skarn Argentina Precordillera San Juan [Argentina] The Gualcamayo mining district (68°38'26.11“W; 29°43'32.42“S) is located in the Central Precordillera, include the Quebrada del Diablo Main disseminated gold deposit, currently in operation; the Amelia Inés-Magdalena polymetallic skarn deposit, and the Quebrada del Diablo Lower West disseminated deposit hosted in tectonic breccias. Petrographic studies and mineral chemical analysis, carried out in the Quebrada del Diablo Lower West ore deposit allowed to determine the ore paragenesis and the evolution of the hydrothermal system. Two mineralization stages have been identified. The first mineralizing pulse consists of calcite (I), quartz (I), pyrite, chalcopyrite, sphalerite, arsenopyrite and scheelite, galena and sorbiyite as inclusions in pyrite. Pyrite is replaced by marcasite and chalcopyrite by covellite. In this paragenesis Au was recognized as inclusions in sphalerite. This pulse is characterized by intermediate sulphidation states and neutral to alkaline pH. The first pulse is cut by veins of calcite (calcite II) characterized by temperatures of 335 ° to 203.4 ° C and salinity of 1.5, on which the dilution and cooling phenomena were fixed. The second pulse is characterized by an increase in the activity of As and S, reaching intermediate to high sulfidation states at neutral to alcaline pH. © 2017, Asociacion Geologica Argentina. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v74_n3_p407_Dannunzio |
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Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Au bearing minerals Central Precordillera Gualcamayo mining district Hydrothermal system evolution Ore mineralogy epithermal deposit gold hydrothermal system mineralization mineralogy mining ore deposit paragenesis petrography skarn Argentina Precordillera San Juan [Argentina] |
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Au bearing minerals Central Precordillera Gualcamayo mining district Hydrothermal system evolution Ore mineralogy epithermal deposit gold hydrothermal system mineralization mineralogy mining ore deposit paragenesis petrography skarn Argentina Precordillera San Juan [Argentina] D’annunzio, M.C. Rubinstein, N. Gómez, A. Hernández, L.B. Ore paragenesis of the quebrada del diablo lower west gold epithermal deposit, san juan |
| topic_facet |
Au bearing minerals Central Precordillera Gualcamayo mining district Hydrothermal system evolution Ore mineralogy epithermal deposit gold hydrothermal system mineralization mineralogy mining ore deposit paragenesis petrography skarn Argentina Precordillera San Juan [Argentina] |
| description |
The Gualcamayo mining district (68°38'26.11“W; 29°43'32.42“S) is located in the Central Precordillera, include the Quebrada del Diablo Main disseminated gold deposit, currently in operation; the Amelia Inés-Magdalena polymetallic skarn deposit, and the Quebrada del Diablo Lower West disseminated deposit hosted in tectonic breccias. Petrographic studies and mineral chemical analysis, carried out in the Quebrada del Diablo Lower West ore deposit allowed to determine the ore paragenesis and the evolution of the hydrothermal system. Two mineralization stages have been identified. The first mineralizing pulse consists of calcite (I), quartz (I), pyrite, chalcopyrite, sphalerite, arsenopyrite and scheelite, galena and sorbiyite as inclusions in pyrite. Pyrite is replaced by marcasite and chalcopyrite by covellite. In this paragenesis Au was recognized as inclusions in sphalerite. This pulse is characterized by intermediate sulphidation states and neutral to alkaline pH. The first pulse is cut by veins of calcite (calcite II) characterized by temperatures of 335 ° to 203.4 ° C and salinity of 1.5, on which the dilution and cooling phenomena were fixed. The second pulse is characterized by an increase in the activity of As and S, reaching intermediate to high sulfidation states at neutral to alcaline pH. © 2017, Asociacion Geologica Argentina. All rights reserved. |
| format |
JOUR |
| author |
D’annunzio, M.C. Rubinstein, N. Gómez, A. Hernández, L.B. |
| author_facet |
D’annunzio, M.C. Rubinstein, N. Gómez, A. Hernández, L.B. |
| author_sort |
D’annunzio, M.C. |
| title |
Ore paragenesis of the quebrada del diablo lower west gold epithermal deposit, san juan |
| title_short |
Ore paragenesis of the quebrada del diablo lower west gold epithermal deposit, san juan |
| title_full |
Ore paragenesis of the quebrada del diablo lower west gold epithermal deposit, san juan |
| title_fullStr |
Ore paragenesis of the quebrada del diablo lower west gold epithermal deposit, san juan |
| title_full_unstemmed |
Ore paragenesis of the quebrada del diablo lower west gold epithermal deposit, san juan |
| title_sort |
ore paragenesis of the quebrada del diablo lower west gold epithermal deposit, san juan |
| url |
http://hdl.handle.net/20.500.12110/paper_00044822_v74_n3_p407_Dannunzio |
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