Sands and clay mineralogy in soils, fluvial and eolian Present sediments in the southern sector of the Chacoparanense basin: Different regions and source ares
Mineralogical analysis based on fine sand and coarse silt fraction from soils and fluvial and aeolian recent sediments of the Pampa Húmeda (Wet Pampas) and the northen region of Santa Fe province and part of the Mesopotamia (Entre Ríos and Corrientes provinces) allowed to define two zones characteri...
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2004
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v59_n2_p317_Etchichury http://hdl.handle.net/20.500.12110/paper_00044822_v59_n2_p317_Etchichury |
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paper:paper_00044822_v59_n2_p317_Etchichury2023-06-08T14:25:46Z Sands and clay mineralogy in soils, fluvial and eolian Present sediments in the southern sector of the Chacoparanense basin: Different regions and source ares Associations Mineralogy Pampean plain Sediments Soils basement rock clay mineral eolian deposit fluvial deposit mineralogy provenance sand sediment analysis soil Argentina Pampas South America Western Hemisphere World Mineralogical analysis based on fine sand and coarse silt fraction from soils and fluvial and aeolian recent sediments of the Pampa Húmeda (Wet Pampas) and the northen region of Santa Fe province and part of the Mesopotamia (Entre Ríos and Corrientes provinces) allowed to define two zones characterized by two genetically different mineralogical associations. Minerals of volcanic - pyroclastic origin (heavy: green, basaltic and brown hornblende, hypersthene, enstatite, augite, magnetite, hematite, ilmenite, leucoxene, epidote, zoicite, and light: plagioclase, volcanic fragments, pumice and glass shards, quartz, orthoclase) are observed over a broad area including whole Buenos Aires and Cordoba provinces, northwestern regions of La Pampa, central and southern Santa Fe and southern Entre Ríos. The provenence of these minerals included the pampean and post-pampean sediments and scarce contribution from volcanic Mesozoic rocks of north Patagonia, Sierras Pampeanas and also Quaternary pyroclastic eruptions. Conversely, a heavy suite of metamorphic provenence (staurolite, kyanite, sillimanite, andalusite, hornblende, epidote, opaques) and a light association composed of igneous and metamorphic clast (monocrystalline and polycrystalline quartz, orthoclase,microcline, schists) and others of sedimentary origin (quartz arenites) is recorded in Corrientes and northern Santa Fe and Entre Ríos provinces. These minerals are coming from older basement rocks outcropping in Brazil and Uruguay and the younger overlain sedimentary succession. The peculiar material distribution is related to the drainage systems and wind pattern. Quartz 30% frecuency isoplet points out the limit between both mineralogical associations. © 2004 Asociación Geológica Argentina. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v59_n2_p317_Etchichury http://hdl.handle.net/20.500.12110/paper_00044822_v59_n2_p317_Etchichury |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Associations Mineralogy Pampean plain Sediments Soils basement rock clay mineral eolian deposit fluvial deposit mineralogy provenance sand sediment analysis soil Argentina Pampas South America Western Hemisphere World |
| spellingShingle |
Associations Mineralogy Pampean plain Sediments Soils basement rock clay mineral eolian deposit fluvial deposit mineralogy provenance sand sediment analysis soil Argentina Pampas South America Western Hemisphere World Sands and clay mineralogy in soils, fluvial and eolian Present sediments in the southern sector of the Chacoparanense basin: Different regions and source ares |
| topic_facet |
Associations Mineralogy Pampean plain Sediments Soils basement rock clay mineral eolian deposit fluvial deposit mineralogy provenance sand sediment analysis soil Argentina Pampas South America Western Hemisphere World |
| description |
Mineralogical analysis based on fine sand and coarse silt fraction from soils and fluvial and aeolian recent sediments of the Pampa Húmeda (Wet Pampas) and the northen region of Santa Fe province and part of the Mesopotamia (Entre Ríos and Corrientes provinces) allowed to define two zones characterized by two genetically different mineralogical associations. Minerals of volcanic - pyroclastic origin (heavy: green, basaltic and brown hornblende, hypersthene, enstatite, augite, magnetite, hematite, ilmenite, leucoxene, epidote, zoicite, and light: plagioclase, volcanic fragments, pumice and glass shards, quartz, orthoclase) are observed over a broad area including whole Buenos Aires and Cordoba provinces, northwestern regions of La Pampa, central and southern Santa Fe and southern Entre Ríos. The provenence of these minerals included the pampean and post-pampean sediments and scarce contribution from volcanic Mesozoic rocks of north Patagonia, Sierras Pampeanas and also Quaternary pyroclastic eruptions. Conversely, a heavy suite of metamorphic provenence (staurolite, kyanite, sillimanite, andalusite, hornblende, epidote, opaques) and a light association composed of igneous and metamorphic clast (monocrystalline and polycrystalline quartz, orthoclase,microcline, schists) and others of sedimentary origin (quartz arenites) is recorded in Corrientes and northern Santa Fe and Entre Ríos provinces. These minerals are coming from older basement rocks outcropping in Brazil and Uruguay and the younger overlain sedimentary succession. The peculiar material distribution is related to the drainage systems and wind pattern. Quartz 30% frecuency isoplet points out the limit between both mineralogical associations. © 2004 Asociación Geológica Argentina. |
| title |
Sands and clay mineralogy in soils, fluvial and eolian Present sediments in the southern sector of the Chacoparanense basin: Different regions and source ares |
| title_short |
Sands and clay mineralogy in soils, fluvial and eolian Present sediments in the southern sector of the Chacoparanense basin: Different regions and source ares |
| title_full |
Sands and clay mineralogy in soils, fluvial and eolian Present sediments in the southern sector of the Chacoparanense basin: Different regions and source ares |
| title_fullStr |
Sands and clay mineralogy in soils, fluvial and eolian Present sediments in the southern sector of the Chacoparanense basin: Different regions and source ares |
| title_full_unstemmed |
Sands and clay mineralogy in soils, fluvial and eolian Present sediments in the southern sector of the Chacoparanense basin: Different regions and source ares |
| title_sort |
sands and clay mineralogy in soils, fluvial and eolian present sediments in the southern sector of the chacoparanense basin: different regions and source ares |
| publishDate |
2004 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v59_n2_p317_Etchichury http://hdl.handle.net/20.500.12110/paper_00044822_v59_n2_p317_Etchichury |
| _version_ |
1768543587449962496 |