Geology of the Golfo San Jorge Basin, Argentina. Geología de la Cuenca del Golfo San Jorge, Argentina.
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TLDR
La cuenca del Golfo San Jorge (Golfo san Jorge) as mentioned in this paper is the most prolifica productora de petroleo de la Argentina, ubicandose sus reservas in segundo lugar tras de la Cuenca Neuquina.Abstract:
La cuenca del Golfo San Jorge esta ubicada en la Patagonia central, entre las latitudes 44° y 47°S, cubriendo una superficie de aproximadamente 170.000 km2. Es la mas prolifica productora de petroleo de la Argentina, ubicandose sus reservas en segundo lugar tras de la Cuenca Neuquina. De tipo intracratonica, predominantemente extensional, tiene una orientacion general E-W, desde la Cordillera de los Andes al Oceano Atlantico; su basamento economico esta compuesto por un complejo volcanico-sedimentario, asociado a un proceso de rift de edad Jurasico Medio a Superior. Posteriormente, comienza el ciclo sedimentario Neocomiano, bajo condiciones de rift tardio, cuyos depositos se encuentran rellenando sintectonicamente los grabenes y hemigrabenes con sedimentos lacustres y esporadicas transgresiones marinas del Pacifico. Luego de un basculamiento regional del eje principal de la cuenca hacia el Este, comienza el ciclo sedimentario Chubutiano. La Formacion Pozo D-129 (Barremiano-Aptiano), de origen principalmente lacustre, es la roca madre mas importante de la cuenca. Sobreyaciendo a esta unidad, un conjunto de sedimentos fluviales y lacustres someros se depositan en condiciones de subsidencia termal generalizada. Estos depositos contienen los reservorios con las mayores acumulaciones de hidrocarburos de la cuenca. Durante el Terciario se alternan depositos marinos y continentales. La fase compresional principal levanta la Faja Plegada de San Bernardo, de sentido N-S, por inversion tectonica de estructuras distensivas preexistentes. Los depositos glaciales del Cuaternario, representan un drastico cambio climatico. La actividad volcanica a lo largo de la historia de la cuenca se refleja en la alta participacion de material tobaceo en la columna sedimentaria, afectando la calidad de los reservorios. La generacion y posterior expulsion del petroleo comienza hace 80-50 Ma. La migracion se ve favorecida por la presencia de fallas, que originan una red de migracion a traves de la cual los hidrocarburos alcanzan los niveles reservorio, para alojarse finalmente en trampas estructurales, estratigraficas y combinadas.read more
Citations
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Journal ArticleDOI
Patagonia: A paleozoic continent adrift?
TL;DR: The evolution of Patagonia as an independent and exotic microcontinent from the rest of South America was a recurrent hypothesis since the XIX century, reaching notoriety during the discussion times of continental drift theory.
Journal ArticleDOI
Repeated eastward shifts of arc magmatism in the Southern Andes: A revision to the long-term pattern of Andean uplift and magmatism
Andrés Folguera,Victor A. Ramos +1 more
TL;DR: The Southern Andes have been built through stacking of crustal sheets in discrete periods during the last 100my as discussed by the authors, where rather anhydrous subducted slabs generated a discontinuous arc emplaced in the foreland area at the time of mountain building.
Journal ArticleDOI
New Age Constraints for the Salamanca Formation and Lower Río Chico Group in the Western San Jorge Basin, Patagonia, Argentina: Implications for Cretaceous-Paleogene Extinction Recovery and Land Mammal Age Correlations
William C. Clyde,Peter Wilf,Ari Iglesias,Rudy Slingerland,Timothy Barnum,Peter K. Bijl,Timothy J. Bralower,Henk Brinkhuis,Emily E. Comer,Brian T. Huber,Mauricio Ibanez-Mejia,Brian R. Jicha,Javier Marcelo Krause,Jonathan D. Schueth,Bradley S. Singer,María Sol Raigemborn,Mark D. Schmitz,Appy Sluijs,María del Carmen Zamaloa +18 more
TL;DR: In this paper, a multi-disciplinary geochronologic study of the Salamanca Formation and overlying Rio Chico Group in the western part of the San Jorge Basin (Patagonia, Argentina) is presented.
Journal ArticleDOI
Timing and magnitude of Holocene sea-level changes along the middle and south Patagonian Atlantic coast derived from beach ridge systems, littoral terraces and valley-mouth terraces.
Gerhard Schellmann,Ulrich Radtke +1 more
TL;DR: Mitrovica et al. as discussed by the authors found that the early Holocene sea-level rise reached the modern coastline by 8100 14C years ago (c. 8600 14C) at the latest.
Journal ArticleDOI
Patagonian broken foreland and related synorogenic rifting: The origin of the Chubut Group Basin
TL;DR: In this paper, structural, 2D and 3D seismic data at the San Bernardo FTB and the adjacent Rio Mayo Basin were analyzed to unravel the different evolutionary stages of the Chubut Group Basin.
References
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Journal ArticleDOI
Geological outline of the basins in southern Argentina and their continuation off the Atlantic shore
J. J. Zambrano,C.M. Urien +1 more
TL;DR: The stratigraphy, structural framework, geological provinces, and evolution of the southern Argentine territory and adjoining continental shelf are discussed in this paper, where four main basins (Salado, Colorado, San Jorge, and Magallanes) and several smaller ones occur in the region and are separated by positive areas.
Book ChapterDOI
Petroleum Basins of Southern South America: An Overview
TL;DR: The Andean batholith is associated with the Andean foreland basin this article, which was formed by sedimentation in the early Tertiary of the Andes and the early Cretaceous of South America.
Journal ArticleDOI
Karoo Rift basins of the Luangwa Valley, Zambia
TL;DR: In this paper, an integrated study of the Luangwa valley Karoo Rift basins of NE Zambia has been carried out using approximately 3000 km of seismic data and data from two exploration wells.
Journal Article
Palinologia estratigrafica del cretacico de argentina austral_ iii.distribucion de las especies y conclusiones
TL;DR: In this paper, a distribucion estratigrafica de 67 palinomorfos in las siguientes perforaciones: YPF Ch Fx 1, CRM es -1, PRM, is -1.
Hydrocarbon Accumulation in an Inverted Segment of the Andean Foreland : San Bernardo Belt, Central Patagonia
TL;DR: The San Bernardo structural province is a multiply deformed belt transecting the peri-Andean segment of the Argentine Patagonia as mentioned in this paper, which is distinctly separate from the fold and thrust belt along the western South American continental plate.
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