Fluid inclusions and stable isotopes in non-ore minerals of the manganese ore deposits in the north of the Córdoba province
In this paper the non-ore minerals of the southern sector of this deposit are studied. Microthermometric analysis on calcite, barite and fluorite show fluid salinities of 2.7 and 4% wt eq. NaCl, and temperatures below 100°C. Isotopes of 13C, 18O and 34S allow to determine a meteoric source for the f...
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2002
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v57_n3_p251_Leal http://hdl.handle.net/20.500.12110/paper_00044822_v57_n3_p251_Leal |
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paper:paper_00044822_v57_n3_p251_Leal2023-06-08T14:25:36Z Fluid inclusions and stable isotopes in non-ore minerals of the manganese ore deposits in the north of the Córdoba province Fluid inclusion Manganese Sierras Pampeanas Stable isotopes barite calcite fluid inclusion fluorite hydrothermal fluid manganese ore deposit stable isotope Argentina In this paper the non-ore minerals of the southern sector of this deposit are studied. Microthermometric analysis on calcite, barite and fluorite show fluid salinities of 2.7 and 4% wt eq. NaCl, and temperatures below 100°C. Isotopes of 13C, 18O and 34S allow to determine a meteoric source for the fluids associated to their precipitation. The δ 13C values obtained in calcite are considered the result of a fluid in equilibrium with atmospheric CO 2 plus the addition of carbon due to dissolution of organic compounds. On the other hand, the δ 34S values of barites can be explained by another fluid with H 2S contents resulting from the dissolution of sulfides from the wall-rock. Finally, the presence of two different fluids is postulated here. An upward fluid was responsible for the barite precipitation where the H 2S was oxidized to SO 4. This fluid could form fluorite and silica varieties as its temperature decreases. The existence of a downward fluid explains calcite generation as the descending fluid is heated. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v57_n3_p251_Leal http://hdl.handle.net/20.500.12110/paper_00044822_v57_n3_p251_Leal |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Fluid inclusion Manganese Sierras Pampeanas Stable isotopes barite calcite fluid inclusion fluorite hydrothermal fluid manganese ore deposit stable isotope Argentina |
| spellingShingle |
Fluid inclusion Manganese Sierras Pampeanas Stable isotopes barite calcite fluid inclusion fluorite hydrothermal fluid manganese ore deposit stable isotope Argentina Fluid inclusions and stable isotopes in non-ore minerals of the manganese ore deposits in the north of the Córdoba province |
| topic_facet |
Fluid inclusion Manganese Sierras Pampeanas Stable isotopes barite calcite fluid inclusion fluorite hydrothermal fluid manganese ore deposit stable isotope Argentina |
| description |
In this paper the non-ore minerals of the southern sector of this deposit are studied. Microthermometric analysis on calcite, barite and fluorite show fluid salinities of 2.7 and 4% wt eq. NaCl, and temperatures below 100°C. Isotopes of 13C, 18O and 34S allow to determine a meteoric source for the fluids associated to their precipitation. The δ 13C values obtained in calcite are considered the result of a fluid in equilibrium with atmospheric CO 2 plus the addition of carbon due to dissolution of organic compounds. On the other hand, the δ 34S values of barites can be explained by another fluid with H 2S contents resulting from the dissolution of sulfides from the wall-rock. Finally, the presence of two different fluids is postulated here. An upward fluid was responsible for the barite precipitation where the H 2S was oxidized to SO 4. This fluid could form fluorite and silica varieties as its temperature decreases. The existence of a downward fluid explains calcite generation as the descending fluid is heated. |
| title |
Fluid inclusions and stable isotopes in non-ore minerals of the manganese ore deposits in the north of the Córdoba province |
| title_short |
Fluid inclusions and stable isotopes in non-ore minerals of the manganese ore deposits in the north of the Córdoba province |
| title_full |
Fluid inclusions and stable isotopes in non-ore minerals of the manganese ore deposits in the north of the Córdoba province |
| title_fullStr |
Fluid inclusions and stable isotopes in non-ore minerals of the manganese ore deposits in the north of the Córdoba province |
| title_full_unstemmed |
Fluid inclusions and stable isotopes in non-ore minerals of the manganese ore deposits in the north of the Córdoba province |
| title_sort |
fluid inclusions and stable isotopes in non-ore minerals of the manganese ore deposits in the north of the córdoba province |
| publishDate |
2002 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v57_n3_p251_Leal http://hdl.handle.net/20.500.12110/paper_00044822_v57_n3_p251_Leal |
| _version_ |
1768541636067852288 |