Abstract:
The Playa Hermosa Formation (Fm.) (Playa Verde Basin) is a volcano-sedimentary unit that crops out in the extreme south of the Dom Feliciano Belt in Uruguay. This formation has traditionally been interpreted as non-glacial in origin, but recently it has been suggested that the lower part at least may be glacially influenced. The stratigraphic position of the Playa Hermosa Fm. and its correlation with other Neoproterozoic units of Uruguay, Argentina and southern Brazil remains in dispute. An age of c. 580 Ma is indicated by a hornblende 39Ar/ 40Ar age on magmatism regarded as coeval with syn-sedimentary volcanism. Preliminary palaeomagnetic data suggest a primary remanence and a mean geomagnetic pole consistent with the proposed apparent polar wander path for the Río de La Plata craton. In combination, these data suggest mid-Ediacaran glacial sedimentation in low to intermediate latitudes on the Río de la Plata craton. However, this conclusion needs to be reinforced by more thorough studies of the age and origin of the Playa Hermosa Fm. © The Geological Society of London 2011.
Registro:
Documento: |
Artículo
|
Título: | Chapter 52 The playa hermosa formation, playa verde basin, Uruguay |
Autor: | Pazos, P.J.; Rapalini, A.E.; Bettucci, L.S.; Tófalo, O.R. |
Filiación: | Departamento de Ciencias Geológicas, FCEN, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires 1428, Argentina Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina Facultad de Ciencias, Universidad de la República, Iguá 4225, 11400 Montevideo, Uruguay
|
Palabras clave: | argon-argon dating; glacial sedimentation; lithostratigraphy; paleomagnetism; Proterozoic; stratigraphic correlation; Brazil; Dom Feliciano Belt; Rio de la Plata; Rio Grande do Sul; Uruguay |
Año: | 2011
|
Volumen: | 36
|
Número: | 1
|
Página de inicio: | 547
|
Página de fin: | 553
|
DOI: |
http://dx.doi.org/10.1144/M36.52 |
Título revista: | Geological Society Memoir
|
Título revista abreviado: | Geol. Soc. Mem.
|
ISSN: | 04354052
|
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_04354052_v36_n1_p547_Pazos |
Referencias:
- Basei, M.A.S., Frimmel, H.E., Nutman, A.P., Preciozzi, F., Jacob, J., A connection between the Neoproterozoic Dom Feliciano (Brazil/Uruguay) and Gariep (Namibia/South Africa) orogenic belts - evidence from a reconnaissance provenance study (2005) Precambrian Research, 139, pp. 195-221
- Blanco, G., Gaucher, C., Estratigrafía, paleontología y edad de la Formación Las Ventanas (Neoproterozoico, Uruguay) (2005) Latin American Journal of Sedimentology and Basin Analysis, 12, pp. 115-131
- Blanco, G., Rajesh, H.M., Gaucher, C., Germs, G.J.B., Chemale Jr., F., Provenance of the Arroyo del Soldado Group (Ediacaran to Cambrian, Uruguay): implications for the paleogeographic evolution of southwestern Gondwana (2009) Precambrian Research, 171, pp. 57-73
- Campos Neto, M.C., Figueiredo, M.C., The Río Doce Orogeny, Southeastern Brazil (1995) Journal of South American Earth Sciences, 8, pp. 143-162
- Eyles, N., Januszczak, N., 'Zipper-rift': a tectonic model for Neoproterozoic glaciations during the break up of Rodinia after 750 Ma (2004) Earth-Science Reviews, 65, pp. 1-73
- Fambrini, G.L., Paes-de-Almeida, R., Riccomini, C., Fragoso-Cesar, A.R.S., Tempestitos com Influência Glacial da Formação Playa Hermosa (Neoproterozóico), Piriápolis, Uruguai (2003) Revista Brasileira de Geociências, 33, pp. 1-12
- Fernandes, L.A.D., Koester, E., An overview of the Neoproterozoic Dorsal de Canguç u strike-slip shear zone and its role in the tectonic evolution of the continental crust in southern Brazil (1999) Journal of African Earth Sciences, 29, pp. 3-24
- Gaucher, C., Boggiani, P.C., Sprechmann, P., Sial, A.N., Fairchild, T., Integrated correlation of the Vendian to Cambrian Arroyo del Soldado and Corumbã Groups (Uruguay and Brazil) palaeogeographic, palaeoclimatic and palaeobiologic implications (2003) Precambrian Research, 120, pp. 241-278
- Gaucher, C., Poiré, D., Peral, L., Chiglino, L., Litoestratigrafía, Bioestratigrafía y correlaciones de las sucesiones sedimentarias del Neoproterozoico-Cámbrico del Cratón del Río de La Plata (Uruguay y Argentina) (2005) Latin American Journal of Sedimentology and Basin Analysis, 12, pp. 145-160
- Gaucher, C., Poiré, D., Finney, S.C., Valéncia, V., Blanco, G., Pamoukaghlian, K., Gómez Peral, L., Zircones detríticos de secuencias neoproterozoicas de Uruguay y Argentina: Inferencias sobre la evolución paleogeográfica del craton del Río de La Plata (2007) V Congreso Uruguayo de Geología, , Uruguay, Montevideo, CD-Rom (extended paper, 25)
- Kirschvink, J.L., The least-squares and plane and the analysis of palaeomagnetic data (1980) Geophysical Journal of the Royal Astronomical Society, 62, pp. 699-718
- Mallmann, G., Chemale Jr., F., Avila, J.N., Kawashita, K., Armstrong, R.A., Isotope geochemistry and geochronology of the Nico Pérez Terrane, Río de La Plata Craton, Uruguay (2007) Gondwana Research, 12, pp. 489-508
- Masquelin, H., Sánchez-Bettucci, L., Propuesta de evolución tectono-sedimentaria para la fosa tardi-Brasliana en la región de Piriápolis, Uruguay (1993) Revista Brasileira de Geociencias, 23, pp. 313-322
- Oyhantçabal, P., Siegesmund, S., Wemmer, K., Frei, R., Layer, P., Post-collisional transition from calc-alkaline to alkaline magmatism during transcurrent deformation in the southernmost Dom Feliciano Belt (Braziliano-Pan-African, Uruguay) (2007) Lithos, 98, pp. 141-159
- Pazos, P.J., Rapalini, A., The controversial stratigraphy of the glacial deposits in the Tandilia System, Argentina (2011) The Geological Record of Neoproterozoic Glaciations, 36, pp. 565-569. , Arnaud E., Halverson G. P., Shields-Zhou G. (Ed.), Geological Society, London, Memoirs
- Pazos, P.J., Tofalo, R., Sánchez Bettucci, L., Procesos sedimentarios e indicadores paleoclimáticos en la sección inferior de la Formación Playa Hermosa, Cuenca Playa Verde, Piriápolis, Uruguay (1998) II Congreso Uruguayo de Geología, Punta del Este, Uruguay, pp. 64-69
- Pazos, P.J., Sánchez Bettucci, L., Tófalo, R.O., The record of the Varanger glaciation at the Río de La Plata craton, Vendian-Cambrian of Uruguay (2003) Gondwana Research, 6, pp. 65-78
- Pazos, P.J., Sánchez Bettucci, L., Loureiro, J., The Neoproterozoic glacial record in the Río de La Plata Craton: a critical reappraisal (2008) West Gondwana Pre-Cenozoic Correlations Across the South Atlantic Region, 294, pp. 343-364. , Pankhurst R. J., Trouw R. A. J., de Brito Neves B. B., de Witt M. J. (Ed.), Geological Society, London, Special Publications
- Pecoits, E., Gingras, M., Aubet, N., Konhauser, K., Ediacaran in Uruguay: palaeoclimatic and palaeobiological implications (2008) Sedimentology, 55, pp. 689-721
- Pecoits, E., Gingras, M.K., Konhauser, K.O., Las Ventanas and San Carlos formations, Maldonado Group, Uruguay (2011) The Geological Record of Neoproterozoic Glaciations, 36, pp. 555-564. , Arnaud E., Halverson G. P., Shields-Zhou G. (Ed.), Geological Society, London, Memoirs
- Rapalini, A.E., New Late Proterozoic paleomagnetic pole for the Río de La Plata craton: implications for Gondwana (2006) Precambrian Research, 147, pp. 223-233
- Rapela, C.W., Pankhurst, R.J., The Río de La Plata craton and the assembly of SW Gondwana (2007) Earth Science Reviews, 83, pp. 49-82
- Sánchez Bettucci, L., (1998) Evolución tectónica del Cinturón Dom Feliciano en la región Minas - Piriápolis, Uruguay, , Argentina, Universidad de Buenos Aires, PhD thesis
- Sánchez Bettucci, L., Linares, E., Primeras Edades en Basaltos del Complejo Sierra de Ánimas, Uruguay (1996) XIII Congreso Geológico Argentino and III Congreso de Exploración de Hidrocarburos I, 1, pp. 399-404. , Argentina, Buenos Aires
- Sánchez Bettucci, L., Pazos, P., Análisis Paleoambiental y Marco tectónico en la Cuenca Playa Verde, Piriápolis, Uruguay (1996) XIII Congreso Geológico Argentino, 1, pp. 405-412. , Argentina, Buenos Aires
- Sánchez Bettucci, L., Ramos, V.A., Aspectos Geológicos de las rocas metavolcánicas y metasedimentarias del Grupo Lavalleja, Sudeste de Uruguay (1999) Revista Brasilera de Geociencias, 29, pp. 557-570
- Sánchez Bettucci, L., Rapalini, A.E., Palaeomagnetism of the Sierra de Las Animas Complex, Southern Uruguay: Its Implications in the Assembly of Western Gondwana (2002) Precambrian Research, 118, pp. 243-265
- Sánchez Bettucci, L., Oyhantçabal, P., Preciozzi, F., Loureiro, J., Ramos, V.A., Basei, M.A.S., Mineralizations of the Lavalleja Group (Uruguay), a Neoproterozoic volcano-sedimentary sequence (2004) Gondwana Research, 7, pp. 745-751
- Sánchez Bettucci, L., Koukharsky, M., Pazos, P.J., Stareczek, S., Neoproterozoic subaqueous extrusive-intrusive rocks in the Playa Hermosa Formation in Uruguay: regional and stratigraphic significance (2009) Gondwana Research, 16, pp. 134-144
- Sánchez Bettucci, L., Peel, E., Masquelin, H., Neoproterozoic tectonic synthesis of Uruguay (2010) International Geology Review, 52, pp. 51-78
Citas:
---------- APA ----------
Pazos, P.J., Rapalini, A.E., Bettucci, L.S. & Tófalo, O.R.
(2011)
. Chapter 52 The playa hermosa formation, playa verde basin, Uruguay. Geological Society Memoir, 36(1), 547-553.
http://dx.doi.org/10.1144/M36.52---------- CHICAGO ----------
Pazos, P.J., Rapalini, A.E., Bettucci, L.S., Tófalo, O.R.
"Chapter 52 The playa hermosa formation, playa verde basin, Uruguay"
. Geological Society Memoir 36, no. 1
(2011) : 547-553.
http://dx.doi.org/10.1144/M36.52---------- MLA ----------
Pazos, P.J., Rapalini, A.E., Bettucci, L.S., Tófalo, O.R.
"Chapter 52 The playa hermosa formation, playa verde basin, Uruguay"
. Geological Society Memoir, vol. 36, no. 1, 2011, pp. 547-553.
http://dx.doi.org/10.1144/M36.52---------- VANCOUVER ----------
Pazos, P.J., Rapalini, A.E., Bettucci, L.S., Tófalo, O.R. Chapter 52 The playa hermosa formation, playa verde basin, Uruguay. Geol. Soc. Mem. 2011;36(1):547-553.
http://dx.doi.org/10.1144/M36.52