Geology of the Argentine continental shelf and margin from aeromagnetic survey

Max, M. D.; Ghidella, Marta E.; Kovacs, L. C.; Paterlini, Marcelo; Valladares, J.A

doi:10.1016/s0264-8172(98)00063-4

Cited by 49 publications

(51 citation statements)

References 33 publications

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“…2), a basement feature inherited by the collision of Patagonia that splits the Neuquén Basin in two distinct depocenters as proposed by Bettini (1984), Franzese and Spalletti (2001), Mosquera and Ramos (2006), among others. Along the offshore, this boundary has been identified by the Tona magnetic anomaly by Ghidella et al (1995), Max et al (1999), and Pángaro and Ramos (2012).…”

Section: Pre-silurian Geology Of Patagoniamentioning

confidence: 87%

Patagonia: where does it come from?

Ramos

Naipauer

2014

Journal of Iberian Geology

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Based on the recent finding of archeocyathids in molassic middle Cambrian to Early Ordovician age-sequences of northern Patagonia the relationships between this southern part of South America and East Antarctica need to be re-examined. Keywords: Archeocyathids, Shackleton Limestones, Early Paleozoic, Orthogneisses, Ross Orogeny Resumen Sobre la base de hallazgos recientes de arqueociátidos en depósitos molásicos de edad cámbrica media a ordovícica temprana del norte de la Patagonia, las relaciones entre esta parte del sur de Sudamérica y Antártida Oriental necesitan ser reexaminadas. La edad cámbrica temprana de los arqueociátidos y su derivación de las Calizas Shackleton abren varias alternativas que son evaluadas sobre la base de la litología y las edades U-Pb en circones de diferentes secuencias metamórficas de la Patagonia y de las Montañas Trasantárticas. Sobre la base de estos datos se propone que el Macizo de Somuncurá del norte de la Patagonia fue el margen conjugado de las Montañas Pensacola de Antártida Oriental. Los episodios principales de deformación son correlacionados dentro del orógeno Ross del Cámbrico-Ordovícico, así como el ambiente de margen pasivo durante el Silúrico y el Devónico que indica que la sección inferior del Supergrupo Beacon de Antártida se corresponde con la Formación Sierra Grande de Patagonia. Estos datos muestran que el terreno Patagonia podría haber estado situado como el margen conjugado de las Montañas Trasantárticas desde el sur de la Tierra Victoria hasta las Montañas Pensacola. El rifting de Patagonia de Antártida y el inicio de la subducción a lo largo del oeste de la Patagonia se correlacionan entre diferentes terrenos mostrando una evolución coherente y robusta a lo largo del Paleozoico temprano entre estos bloques. El amalgamiento final de la Patagonia con el Gondwana Occidental se produjo en el Paleozoico tardío, pero no es analizado en la presente contribución.

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Section: Pre-silurian Geology Of Patagoniamentioning

confidence: 87%

Patagonia: where does it come from?

Ramos

Naipauer

2014

Journal of Iberian Geology

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“…1). If the features along 47˚S are due to activity along the fracture zone, trends E-W, as suggested by Max et al (1999). As free gas and hydrate gases are diffused in the shallow stratigraphic levels of the region, as indicated by the pockmarks, gas wipeouts, local uplifts and vents, vertical migration of such overpressure fluids also may have been a major contributor to the syn-sedimentary deformation.…”

Section: D Sediment Swellmentioning

confidence: 92%

“…Max et al (1999) inferred from magnetics that it trended E-W and Franke et al (2007) proposed, from multi-channel seismic data, that it trended NW-SE (Fig. 1).…”

Section: D Sediment Swellmentioning

confidence: 93%

Geomorphology and shallow structure of a segment of the Atlantic Patagonian margin

Muñoz¹,

Acosta²,

Cristobo³

et al. 2013

Earth-Science Reviews

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“…1b). After Ramos (1984Ramos ( , 1986), a 'cryptic suture' resulted from the closure of an ocean due to southwest-dipping subduction beneath the North Patagonian Massif and it is covered by Mesozoic sedimentary rocks of the Colorado basin (Max et al 1999). In more recent reviews of the tectonic evolution of Patagonia, Ramos (2002Ramos ( , 2004Ramos ( , 2008 and Pankhurst et al (2006) include a prior Early Paleozoic collision with the Deseado Massif.…”

Section: Regional Aspectsmentioning

confidence: 99%

Isotopic studies on detrital zircons of Silurian–Devonian siliciclastic sequences from Argentinean North Patagonia and Sierra de la Ventana regions: comparative provenance

Uriz

Cingolani

Chemale

et al. 2010

Int J Earth Sci (Geol Rundsch)

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The Silurian-Devonian siliciclastic sedimentary units known as Sierra Grande Formation and the upper part of the Ventana Group crop out in the eastern area of the North Patagonian Massif and in the Ventania system, toward the Atlantic border of Argentina. Both sequences show similar stratigraphical characteristics and were deposited in a shallow marine platform paleoenvironment. Previous contributions have provided evidence of an allochthonous Patagonia terrane that amalgamate to Gondwana during the Permian-Triassic. However, other lines of research support a crustal continuity southward, where the Pampean and Famatinian events extend into the northern Patagonia. In either case, the detrital input to the Eo-Mesopaleozoic basins generated along the passive margin tectonic setting should reflect the sedimentary sources. In this contribution, new age data on the sedimentary provenance of these units is provided by U-Pb and Lu-Hf isotopic studies on detrital zircons, using LA-ICP-MS and SHRIMP methodologies. The main sedimentary sources of detrital zircons for both regions are of Cambrian-Ordovician and Neoproterozoic age, while a secondary mode is Mesoproterozoic. Zircons from older cratonic sources (Mesoarchean-Paleoproterozoic ages) are scarcely recorded. The sample from the upper section of the Devonian Lolén Formation (Ventana Group) shows an important change in the sedimentary provenance, with a main mode of Mesoproterozoic detrital zircons. Detrital source areas considering the orogenic cycles known for southwest South America (Famatinian, PampeanBrasiliano, Mesoproterozoic-'Grenvillian' and Paleoproterozoic-'Transamazonian') are proposed.

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Geology of the Argentine continental shelf and margin from aeromagnetic survey

Cited by 49 publications

References 33 publications

Patagonia: where does it come from?

Patagonia: where does it come from?

Geomorphology and shallow structure of a segment of the Atlantic Patagonian margin

Isotopic studies on detrital zircons of Silurian–Devonian siliciclastic sequences from Argentinean North Patagonia and Sierra de la Ventana regions: comparative provenance

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