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dc.contributor.author
Veizaga Saavedra, Juan Gonzalo
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dc.contributor.author
Poiré, Daniel G.
dc.contributor.author
Vergani, Gustavo Dardo
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dc.contributor.author
Salfity, Jose Antonio
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dc.contributor.author
Rubinstein, Claudia Viviana
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dc.contributor.author
Pérez Leytón, Miguel A.
dc.date.available
2021-09-24T12:02:52Z
dc.date.issued
2020-11
dc.identifier.citation
Veizaga Saavedra, Juan Gonzalo; Poiré, Daniel G.; Vergani, Gustavo Dardo; Salfity, Jose Antonio; Rubinstein, Claudia Viviana; et al.; Paleoenvironment and age of Los Monos Formation (Devonian), Tarija Basin, Argentina and Bolivia; Asociación Argentina de Sedimentología; Latin American Journal of Sedimentology and Basin Analysis; 28; 1; 11-2020; 1-35
dc.identifier.issn
1851-4979
dc.identifier.uri
http://hdl.handle.net/11336/141434
dc.description.abstract
The objective of this work is to discuss the paleoenvironment and age of the Los Monos Formation, in outcrop and subsurface, along a regional transect (west-east) in the southern sector of the Tarija basin. The lithofacies and ichnofacies of the Alarache, Angosto del Pescado and Balapuca outcrops and core-intervals of the Aguas Blancas xp-13, Ramos x-12, Tartagal x-1 and Tonono x-1 boreholes were analyzed. The definition of lithofacies and ichnofacies allowed us to interpret a shallow to deep marine paleoenvironment (from the offshore-transition, offshore and shelf). Towards the top of the Tonono Formation, the equivalent of the Los Monos Formation in the Chaco-Salteño was defined as a brackish-waters marginal-marine paleoenvironment. The mineralogy of the mentioned sections plus the Vespucio x-1 borehole was analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM), thus the majority elements in clay minerals were also determined from EDAX. Authigenic and detrital clays from SEM-EDAX were recognized. Four clay mineral assemblages were defined (I+Ch; Ch+I; I+K; K+I), where I+K and K+I assemblages characterize the transgressive events within the basin. The palynofacies of the Balapuca, Alarache and Angosto del Pescado outcrops and samples from the Ramos xp-1002, Ramos xp-1011 and Ramos xp-1012 boreholes were defined, the dominance of terrestrial palynomorphs was recognized with variable participation of marine palynomorphs, according to a shallow marine paleoenvironment with shoreline shifts. Two transgressive events were identified during the late Eifelian-early Givetian and the late Givetian-early Frasnian, which are characterized by an increase in marine components and clay assemblages of I+K and K+I. The palynological associations pont to a late Eifelian-early to middle Givetian age for the Los Monos Formation in the study area. The analysis of illite crystallinity and expansive layers in the mixed-layer IS determined advanced diagenesis for the unit, from late mesodiagenesis (Tonono x-1 and Vespucio x-1) to telodiagenesis (Balapuca and Ramos), according to the final stage of oil generation window to gas generation window, respectively. Finally, based on the mineral composition with a predominance of quartz (>70% in average) and low content of clays (<20% in average), thermal maturity in oil and gas window, the important thickness in the subsurface (700-1000 meters) and significant lateral continuity (>100 km2), the unit has some of the attributes to be considered as a shale-type unconventional reservoir.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Asociación Argentina de Sedimentología
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc/2.5/ar/
dc.subject
LOS MONOS SHALE
dc.subject
LITHOFACIES
dc.subject
PALYNOFACIES
dc.subject
CLAY MINERAL ASSEMBLAGES
dc.subject
MIDDLE DEVONIAN
dc.subject
SUB-ANDEAN RANGES
dc.subject.classification
Geociencias multidisciplinaria
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Paleoenvironment and age of Los Monos Formation (Devonian), Tarija Basin, Argentina and Bolivia
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-09-06T19:55:56Z
dc.journal.volume
28
dc.journal.number
1
dc.journal.pagination
1-35
dc.journal.pais
Argentina
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dc.journal.ciudad
Buenos Aires
dc.description.fil
Fil: Veizaga Saavedra, Juan Gonzalo. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Poiré, Daniel G.. Comision de Investigaciones Cientificas de la Provincia de Buenos Aires. Centro de Geologia Aplicada, Agua y Medio Ambiente.; Argentina
dc.description.fil
Fil: Vergani, Gustavo Dardo. No especifíca;
dc.description.fil
Fil: Salfity, Jose Antonio. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Instituto del Cenozoico; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Rubinstein, Claudia Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.description.fil
Fil: Pérez Leytón, Miguel A.. No especifíca;
dc.journal.title
Latin American Journal of Sedimentology and Basin Analysis
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://lajsba.sedimentologia.org.ar/index.php/lajsba/article/view/48
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