Structural control on Neogene volcanism and related ore deposits at Cańada Honda district, San Luis province
Located at the transitional southern end (33o S) of the Pampean flat-slab, the Tertiary volcanic belt records the eastward migration of the Andean volcanic arc due to the flattening of the Nazca Plate in Mio-Pliocene times. The tertiary volcanic belt encompasses several very important metallogenetic...
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paper:paper_00044822_v67_n4_p494_Japas2023-06-08T14:26:30Z Structural control on Neogene volcanism and related ore deposits at Cańada Honda district, San Luis province Japas, Maria Silvia Ore-deposits Pampean flat-slab Pampean ranges Structural control Tertiary volcanic belt emplacement geochronology hydrothermal alteration island arc lava Nazca plate Neogene ore deposit outcrop strain structural control tectonic setting volcanic eruption volcanism Argentina San Luis Sierra de San Luis Sierras Pampeanas Located at the transitional southern end (33o S) of the Pampean flat-slab, the Tertiary volcanic belt records the eastward migration of the Andean volcanic arc due to the flattening of the Nazca Plate in Mio-Pliocene times. The tertiary volcanic belt encompasses several very important metallogenetic districts in the San Luis Pampean Ranges. Volcanic rocks and associated ore-deposits crop out following a NW-WNW trending belt at La Carolina, Cañada Honda - Cerros Largos, Cerros del Rosario and El Morro volcanic fields. The available geochronological data indicate that the volcanic activity began early at the western end of the belt and ended ~ 10 Ma later at its eastern border. Cañada Honda district represents the oldest and longest-lived volcanic field of the tertiary volcanic belt. It records eruptive events and related hydrothermal alteration from 12-13 Ma to 7.3 Ma, including lavas and volcaniclastic products. Preliminary structural analysis shows that previous structures have strongly controlled, either directly or indirectly, the emplacement of volcanic rocks and related mineral deposits. Kinematic and strain fabric analyses allow to recognize two volcano-tectonic associations. One of these associations would be related to dextral reactivations of structures parallel to basement foliation. On the other hand, the main one would be linked with the generation of two volcano-tectonic depressions which are aligned in a NW-WNW direction. Their dominant structures trend NW-WNW and reveal sinistral-normal motions, both at local and Tertiary volcanic belt scales. Fil:Japas, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v67_n4_p494_Japas http://hdl.handle.net/20.500.12110/paper_00044822_v67_n4_p494_Japas |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Ore-deposits Pampean flat-slab Pampean ranges Structural control Tertiary volcanic belt emplacement geochronology hydrothermal alteration island arc lava Nazca plate Neogene ore deposit outcrop strain structural control tectonic setting volcanic eruption volcanism Argentina San Luis Sierra de San Luis Sierras Pampeanas |
| spellingShingle |
Ore-deposits Pampean flat-slab Pampean ranges Structural control Tertiary volcanic belt emplacement geochronology hydrothermal alteration island arc lava Nazca plate Neogene ore deposit outcrop strain structural control tectonic setting volcanic eruption volcanism Argentina San Luis Sierra de San Luis Sierras Pampeanas Japas, Maria Silvia Structural control on Neogene volcanism and related ore deposits at Cańada Honda district, San Luis province |
| topic_facet |
Ore-deposits Pampean flat-slab Pampean ranges Structural control Tertiary volcanic belt emplacement geochronology hydrothermal alteration island arc lava Nazca plate Neogene ore deposit outcrop strain structural control tectonic setting volcanic eruption volcanism Argentina San Luis Sierra de San Luis Sierras Pampeanas |
| description |
Located at the transitional southern end (33o S) of the Pampean flat-slab, the Tertiary volcanic belt records the eastward migration of the Andean volcanic arc due to the flattening of the Nazca Plate in Mio-Pliocene times. The tertiary volcanic belt encompasses several very important metallogenetic districts in the San Luis Pampean Ranges. Volcanic rocks and associated ore-deposits crop out following a NW-WNW trending belt at La Carolina, Cañada Honda - Cerros Largos, Cerros del Rosario and El Morro volcanic fields. The available geochronological data indicate that the volcanic activity began early at the western end of the belt and ended ~ 10 Ma later at its eastern border. Cañada Honda district represents the oldest and longest-lived volcanic field of the tertiary volcanic belt. It records eruptive events and related hydrothermal alteration from 12-13 Ma to 7.3 Ma, including lavas and volcaniclastic products. Preliminary structural analysis shows that previous structures have strongly controlled, either directly or indirectly, the emplacement of volcanic rocks and related mineral deposits. Kinematic and strain fabric analyses allow to recognize two volcano-tectonic associations. One of these associations would be related to dextral reactivations of structures parallel to basement foliation. On the other hand, the main one would be linked with the generation of two volcano-tectonic depressions which are aligned in a NW-WNW direction. Their dominant structures trend NW-WNW and reveal sinistral-normal motions, both at local and Tertiary volcanic belt scales. |
| author |
Japas, Maria Silvia |
| author_facet |
Japas, Maria Silvia |
| author_sort |
Japas, Maria Silvia |
| title |
Structural control on Neogene volcanism and related ore deposits at Cańada Honda district, San Luis province |
| title_short |
Structural control on Neogene volcanism and related ore deposits at Cańada Honda district, San Luis province |
| title_full |
Structural control on Neogene volcanism and related ore deposits at Cańada Honda district, San Luis province |
| title_fullStr |
Structural control on Neogene volcanism and related ore deposits at Cańada Honda district, San Luis province |
| title_full_unstemmed |
Structural control on Neogene volcanism and related ore deposits at Cańada Honda district, San Luis province |
| title_sort |
structural control on neogene volcanism and related ore deposits at cańada honda district, san luis province |
| publishDate |
2010 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v67_n4_p494_Japas http://hdl.handle.net/20.500.12110/paper_00044822_v67_n4_p494_Japas |
| work_keys_str_mv |
AT japasmariasilvia structuralcontrolonneogenevolcanismandrelatedoredepositsatcanadahondadistrictsanluisprovince |
| _version_ |
1768544710626902016 |