Rifting evolution of the Malvinas basin, offshore Argentina: New constrains from zircon U–Pb geochronology and seismic characterization

Lovecchio, Juan Pablo; Naipauer, Maximiliano; Cayo, Lubin Eric; Rohais, Sébastien; Giunta, David; Flores, G.; Gerster, Ricardo; Bolatti, Néstor D.; Joseph, Philippe; Valencia, Víctor A.; Ramos, Víctor A.

doi:10.1016/j.jsames.2019.102253

Cited by 22 publications

(30 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…3), was crucial to identify at least three super-imposed rifting J o u r n a l P r e -p r o o f Journal Pre-proof stages in the Argentinean margin (Lovecchio et al, 2018). By extrapolating previous results from the Colorado and Malvinas basins (Lovecchio et al, 2018(Lovecchio et al, , 2019 and by integrating them in a geodynamic framework updated with the geochronological data produced by different authors in the last 30 years, we review in this contribution the chronology of Mesozoic basin formation in southern South America and Africa and integrate those events in the long-term rifting history of SW Gondwana at a supraregional scale. We also present here newly generated paleotectonic models that illustrate the different stages of SW Gondwana Mesozoic rifting.…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Mesozoic rifting evolution of SW Gondwana: A poly-phased, subduction-related, extensional history responsible for basin formation along the Argentinean Atlantic margin

Lovecchio¹,

Rohais

Joseph

et al. 2020

Earth-Science Reviews

Self Cite

View full text Add to dashboard Cite

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Mesozoic rifting evolution of SW Gondwana: A poly-phased, subduction-related, extensional history responsible for basin formation along the Argentinean Atlantic margin

Lovecchio¹,

Rohais

Joseph

et al. 2020

Earth-Science Reviews

Self Cite

View full text Add to dashboard Cite

“…The eastern sector of the North Patagonian Massif appears to continue beneath the Argentine shelf as evidenced by similar geophysical attributes and NNW-oriented fabrics (Max et al, 1999;Pángaro and Ramos, 2012). Moreover, Lovecchio et al (2019, their fig. 2) recently suggested that the Early Jurassic Chon Aike magmatic province could have extended to the North Malvinas Basin, likely located a few hundreds of kilometers from the present-day Atlantic Patagonian coastline.…”

Section: Remote Versus Nearby Source Areasmentioning

confidence: 83%

“…The synrift volcanics within the Neuquén Basin are typically covered by hundreds of meters of postrift strata even in the southeast and northeast marginal areas of the basin (e.g., Iñigo et al, 2018), and therefore they are not likely candidates for providing Early Jurassic zircon grains to the Valanginian-Hauterivian Pilmatué strata. Additionally, the oldest Upper Triassic synrift rocks are not represented in (Lovecchio et al, 2019) (Fig. 10).…”

Section: Discussionmentioning

confidence: 99%

U-Pb geochronology and paleogeography of the Valanginian–Hauterivian Neuquén Basin: Implications for Gondwana-scale source areas

et al. 2020

View full text Add to dashboard Cite

Sedimentary basins located at the margins of continents act as the final base level for continental-scale catchments that are sometimes located thousands of kilometers away from the basin, and this condition of exceptionally long sediment transfer zones is probably reinforced in supercontinents, such as Gondwana. One of the most prominent marine basins in southwestern Gondwana during the Jurassic and Early Cretaceous was the Neuquén Basin (west-central Argentina), but its role as a sediment repository of far-flung source areas has not been extensively considered. This contribution provides the first detailed detrital-zircon U-Pb geochronology of the Valanginian–Hauterivian Pilmatué Member of the Agrio Formation, which is combined with sedimentology and paleogeographic reconstructions of the unit within the Neuquén Basin for a better understanding of the fluvial delivery systems. Our detrital-zircon signatures suggest that Triassic–Permian zircon populations were probably sourced from the adjacent western sector of the North Patagonian Massif, whereas Early Jurassic, Cambrian, Ordovician, and Proterozoic grains were most likely derived from farther east, in the eastern sector of the North Patagonian Massif, as well as presently remote terranes such as the Saldania Belt in southern Africa. We thus propose a Valanginian–Hauterivian longitudinal delivery system that, starting in the mid-continent region of southwestern Gondwana and by effective sorting, was bringing fine-grained or finer caliber sand to the Neuquén Basin shoreline. This delivery system was probably active (though not necessarily continuously) from Early Jurassic to Early Cretaceous until finally coming to an end during the opening of the South Atlantic Ocean in the latest Early Cretaceous.

show abstract

“…The locations of the Western, Central and Eastern domains are taken from [17 , 18] . Zircon 206 Pb/ 238 U concordia ages collected in this study using LA-ICP-MS are presented along with published: 1 – [7] , 2 – [17] , 3 – [14] , 4 – [15] , 5 – [16] , 6 – [22] . All uncertainties are quoted at ±2σ.…”

Section: Data Descriptionmentioning

confidence: 99%

Data on the arc magmatism developed in the Antarctic Peninsula and Patagonia during the Late Triassic–Jurassic: A compilation of new and previous geochronology, geochemistry and isotopic tracing results

et al. 2021

View full text Add to dashboard Cite

We present the results of U-Pb zircon dating conducted using laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS), isotopic tracing analyses of Hf in zircon and Sr-Nd in whole-rock and whole-rock major oxides, and trace element abundances of 12 plutonic and volcanic rocks present on the Antarctic Peninsula. The dataset is presented in combination with the results of previous studies conducted in both Patagonia and the Antarctic Peninsula. These results were filtered for concordant 206 Pb– 238 U zircon ages and topology of the 40 Ar/ 39 Ar age spectra. These results may be useful for researchers studying the geological evolution of southern Gondwana, West Antarctica or Patagonia. The interpretation of this dataset is found in the co-submitted paper by Bastias, et al. (2021a) titled ‘A revised interpretation of the Chon Aike magmatic province: active margin origin and implications for the opening of the Weddell Sea’.

show abstract

Rifting evolution of the Malvinas basin, offshore Argentina: New constrains from zircon U–Pb geochronology and seismic characterization

Cited by 22 publications

References 49 publications

Mesozoic rifting evolution of SW Gondwana: A poly-phased, subduction-related, extensional history responsible for basin formation along the Argentinean Atlantic margin

Mesozoic rifting evolution of SW Gondwana: A poly-phased, subduction-related, extensional history responsible for basin formation along the Argentinean Atlantic margin

U-Pb geochronology and paleogeography of the Valanginian–Hauterivian Neuquén Basin: Implications for Gondwana-scale source areas

Data on the arc magmatism developed in the Antarctic Peninsula and Patagonia during the Late Triassic–Jurassic: A compilation of new and previous geochronology, geochemistry and isotopic tracing results

Contact Info

Product

Resources

About