Eolian deposits of the southwestern margin of the Botucatú paleoerg: Reconstruction of the Gondwana landscape in Central Northern Argentina

The Mesozoic Botucatú paleoerg at the southwestern margin of Gondwana includes a succession of eolian dunes cross-strata which are presently exposed in Otumpa Hills (Central Northern Argentina). Here, the architectural facies, petrology, and provenance of those rocks were studied in order to investi...

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Autor principal: Peri, V.G
Otros Autores: Naipauer, M., Pimentel, M., Barcelona, H.
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Publicado: Elsevier B.V. 2015
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100 1 |a Peri, V.G. 
245 1 0 |a Eolian deposits of the southwestern margin of the Botucatú paleoerg: Reconstruction of the Gondwana landscape in Central Northern Argentina 
260 |b Elsevier B.V.  |c 2015 
270 1 0 |m Peri, V.G.; Instituto de Geociencias Básicas, Aplicadas y Ambientales, Pabellón II, Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas. Ciudad UniversitariaArgentina; email: gisel_peri@yahoo.com.ar 
506 |2 openaire  |e Política editorial 
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504 |a Wright, V.P., Tucker, M.E., Calcretes: an introduction (1991) Calcretes, pp. 1-22. , V.P. Wright M.E. Tucker International Association of Sedimentologists Oxford 
520 3 |a The Mesozoic Botucatú paleoerg at the southwestern margin of Gondwana includes a succession of eolian dunes cross-strata which are presently exposed in Otumpa Hills (Central Northern Argentina). Here, the architectural facies, petrology, and provenance of those rocks were studied in order to investigate depositional environments and paleoclimates. The stratigraphic sequence included basal eolian two-dimensional crescentic dunes (Slp) overlain by three-dimensional crescentic dunes of smaller scale (Smt). These were correlated with the Upper Member Rivera of the Tacuarembó Formation (Uruguay), or its equivalent in Brazil, the Botucatú Formation. These outcrops partially mark the southwestern margin of the Botucatú paleoerg along the Chaco–Paraná Basin boundary. The paleocurrents from the W, NW, and SW and the U–Pb ages of detrital zircons indicate a main Pampean cratonic and secondary Andean magmatic arc (180 Ma) source. A detrital zircon of 180 Ma by U–Pb limits a maximum depositional age at 180 Ma (Toarcian) for facies Slp. Upwards, the phreatic silcrete and calcrete indicate semiarid conditions during the Paleocene, which are correlated with the Queguay Formation of Uruguay. A saprolite paleoweathering profile, recording wet tropical–hyper-tropical climate at the Early Eocene and representing the Gondwana landscape and climate conditions, crowns the sequence. This study represents the first provenance and surface texture analysis of minerals from the Botucatú paleoerg and was instrumental to unravel past environmental and sedimentary conditions. © 2016 Elsevier B.V.  |l eng 
536 |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas, PIP D703 
536 |a Detalles de la financiación: We acknowledge the Argentine Council for Scientific and Technical Research (CONICET, grant PIP D703, 2011) and Dra. Pomposiello for providing financial support to improve the logistics. We also thank Gabriel Giordanengo (Instituto de Geocronología y Geología Isotópica) for his valuable technical assistance during the field work and Geological Center Investigations (CONICET) for the X-ray diffraction analysis. Technical support provided by Barbara Lima and Erico Zacchi of the Geochronology Laboratory of the University of Brasilia is acknowledged. We also thank Drs. David Krinsley, Victor A. Ramos, Eduardo Rossello, and Rita Tófalo, the anonymous reviewer, Dr. Claiton Scherer (reviewer) and Dr. Brian Jones (Editor), whose suggestions have greatly improved the manuscript. 
593 |a Instituto de Geociencias Básicas, Aplicadas y Ambientales, Pabellón II, Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas. Ciudad Universitaria, Ciudad de Buenos Aires, C1428EHA, Argentina 
593 |a Instituto de Estudios Andinos Don Pablo Groeber, Pabellón II, Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas. Ciudad Universitaria, Ciudad de Buenos Aires, C1428EHA, Argentina 
593 |a Instituto de Geociências, Universidade de Brasília, Brasília, Distrito Federal, Brazil 
690 1 0 |a BOTUCATU FORMATION 
690 1 0 |a BOTUCATU PALEOERG 
690 1 0 |a GONDWANA LANDSCAPE 
690 1 0 |a OTUMPA HILLS 
690 1 0 |a RIVERA MEMBER OF TACUAREMBO FORMATION 
690 1 0 |a GEOCHRONOLOGY 
690 1 0 |a LEAD COMPOUNDS 
690 1 0 |a ROCKS 
690 1 0 |a SILICATE MINERALS 
690 1 0 |a STRATIGRAPHY 
690 1 0 |a ZIRCON 
690 1 0 |a CLIMATE CONDITION 
690 1 0 |a DEPOSITIONAL ENVIRONMENT 
690 1 0 |a GONDWANA LANDSCAPE 
690 1 0 |a OTUMPA HILLS 
690 1 0 |a SEMI-ARID CONDITIONS 
690 1 0 |a STRATIGRAPHIC SEQUENCES 
690 1 0 |a SURFACE TEXTURE ANALYSIS 
690 1 0 |a TROPICAL CLIMATES 
690 1 0 |a DEPOSITION 
690 1 0 |a DEPOSITIONAL ENVIRONMENT 
690 1 0 |a EOLIAN DEPOSIT 
690 1 0 |a ERG 
690 1 0 |a GONDWANA 
690 1 0 |a MESOZOIC 
690 1 0 |a PALEOCLIMATE 
690 1 0 |a PALEOENVIRONMENT 
690 1 0 |a SEQUENCE STRATIGRAPHY 
690 1 0 |a STRATIGRAPHIC CORRELATION 
690 1 0 |a BOTUCATU 
690 1 0 |a BRAZIL 
690 1 0 |a PAMPAS 
690 1 0 |a SAO PAULO [BRAZIL] 
651 4 |a CHACO–PAMPEAN PLAIN 
651 4 |a ARGENTINA 
651 4 |a CHACO [ARGENTINA] 
700 1 |a Naipauer, M. 
700 1 |a Pimentel, M. 
700 1 |a Barcelona, H. 
773 0 |d Elsevier B.V., 2015  |g v. 339  |h pp. 234-257  |p Sediment. Geol.  |x 00370738  |w (AR-BaUEN)CENRE-87  |t Sedimentary Geology 
856 4 1 |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-84963568761&doi=10.1016%2fj.sedgeo.2016.03.019&partnerID=40&md5=94b24ced5408980d52af25f4426b0583  |y Registro en Scopus 
856 4 0 |u https://doi.org/10.1016/j.sedgeo.2016.03.019  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_00370738_v339_n_p234_Peri  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00370738_v339_n_p234_Peri  |y Registro en la Biblioteca Digital 
961 |a paper_00370738_v339_n_p234_Peri  |b paper  |c PE 
962 |a info:eu-repo/semantics/article  |a info:ar-repo/semantics/artículo  |b info:eu-repo/semantics/publishedVersion 
963 |a VARI 
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