The neoproterozoic glacial record in the Río de la Plata Craton: A critical reappraisal
Neoproterozoic glacial successions have been described in South America, but the glacial deposits of the Río de la Plata Craton have been neglected in previous studies addressing the global distribution of glacially influenced successions. The Río de la Plata Craton contains Neoproterozoic glacial d...
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todo:paper_03058719_v294_n_p343_Pazos2023-10-03T15:22:02Z The neoproterozoic glacial record in the Río de la Plata Craton: A critical reappraisal Pazos, P.J. Bettucci, L.S. Loureiro, J. Pankhurst R.J. Trouw R.A.J. De Brito Neves B.B. De Wit M.J. carbonate rock clast conference proceeding deposition diamictite glacial deposit glaciation Gondwana Proterozoic rhythmite Brazil Dom Feliciano Belt Rio de la Plata Rio Grande do Sul South America Neoproterozoic glacial successions have been described in South America, but the glacial deposits of the Río de la Plata Craton have been neglected in previous studies addressing the global distribution of glacially influenced successions. The Río de la Plata Craton contains Neoproterozoic glacial deposits in the Sierra del Volcán Formation (Tandilia. System, Argentina), glacial influenced deposits in the Playa Hermosa and Zanja del Tigre formations (Dom Feliciano Belt, Uruguay) and suspected glacially influenced deposits in Passo da Areia (São Gabriel block, Brazil). The Tandilia System glacial record includes diamictites, dropstones and rhythmites deposited in glaciomarine conditions in a tectonically stable depositional setting. The Dom Feliciano Belt includes a thin section with ice-rafted clasts in carbonates and a thicker section containing diamictites, rhythmites, outsized clasts and deformed beds in a volcano-sedimentary succession. The São Gabriel block occurrence deserves more attention to confirm any glacial influence in the fine-grained part of the succession. Glaciation is considered to be contemporaneous with the Gaskiers glaciation (580 Ma), with the exception of the carbonates with dropstones that may represent a previous event correlative with one of the glaciations described in the Kalahari Craton, prior to Kalahari-Río de la Plata assembly in the proto-western Gondwana margin. © The Geological Society of London 2008. SER info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03058719_v294_n_p343_Pazos |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
carbonate rock clast conference proceeding deposition diamictite glacial deposit glaciation Gondwana Proterozoic rhythmite Brazil Dom Feliciano Belt Rio de la Plata Rio Grande do Sul South America |
| spellingShingle |
carbonate rock clast conference proceeding deposition diamictite glacial deposit glaciation Gondwana Proterozoic rhythmite Brazil Dom Feliciano Belt Rio de la Plata Rio Grande do Sul South America Pazos, P.J. Bettucci, L.S. Loureiro, J. Pankhurst R.J. Trouw R.A.J. De Brito Neves B.B. De Wit M.J. The neoproterozoic glacial record in the Río de la Plata Craton: A critical reappraisal |
| topic_facet |
carbonate rock clast conference proceeding deposition diamictite glacial deposit glaciation Gondwana Proterozoic rhythmite Brazil Dom Feliciano Belt Rio de la Plata Rio Grande do Sul South America |
| description |
Neoproterozoic glacial successions have been described in South America, but the glacial deposits of the Río de la Plata Craton have been neglected in previous studies addressing the global distribution of glacially influenced successions. The Río de la Plata Craton contains Neoproterozoic glacial deposits in the Sierra del Volcán Formation (Tandilia. System, Argentina), glacial influenced deposits in the Playa Hermosa and Zanja del Tigre formations (Dom Feliciano Belt, Uruguay) and suspected glacially influenced deposits in Passo da Areia (São Gabriel block, Brazil). The Tandilia System glacial record includes diamictites, dropstones and rhythmites deposited in glaciomarine conditions in a tectonically stable depositional setting. The Dom Feliciano Belt includes a thin section with ice-rafted clasts in carbonates and a thicker section containing diamictites, rhythmites, outsized clasts and deformed beds in a volcano-sedimentary succession. The São Gabriel block occurrence deserves more attention to confirm any glacial influence in the fine-grained part of the succession. Glaciation is considered to be contemporaneous with the Gaskiers glaciation (580 Ma), with the exception of the carbonates with dropstones that may represent a previous event correlative with one of the glaciations described in the Kalahari Craton, prior to Kalahari-Río de la Plata assembly in the proto-western Gondwana margin. © The Geological Society of London 2008. |
| format |
SER |
| author |
Pazos, P.J. Bettucci, L.S. Loureiro, J. Pankhurst R.J. Trouw R.A.J. De Brito Neves B.B. De Wit M.J. |
| author_facet |
Pazos, P.J. Bettucci, L.S. Loureiro, J. Pankhurst R.J. Trouw R.A.J. De Brito Neves B.B. De Wit M.J. |
| author_sort |
Pazos, P.J. |
| title |
The neoproterozoic glacial record in the Río de la Plata Craton: A critical reappraisal |
| title_short |
The neoproterozoic glacial record in the Río de la Plata Craton: A critical reappraisal |
| title_full |
The neoproterozoic glacial record in the Río de la Plata Craton: A critical reappraisal |
| title_fullStr |
The neoproterozoic glacial record in the Río de la Plata Craton: A critical reappraisal |
| title_full_unstemmed |
The neoproterozoic glacial record in the Río de la Plata Craton: A critical reappraisal |
| title_sort |
neoproterozoic glacial record in the río de la plata craton: a critical reappraisal |
| url |
http://hdl.handle.net/20.500.12110/paper_03058719_v294_n_p343_Pazos |
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