The Puesto Piris Formation: Evidence of basin-development in the North Patagonian Massif during crustal extension associated with Gondwana breakup

Strazzere, Leonardo; Gregori, Daniel Alfredo; Benedini, Leonardo; Marcos, Paulo; Barros, Mercedes Virginia; Geraldes, Mauro César; Pivetta, Cecilia Mariana Pavon

doi:10.1016/j.gsf.2017.12.019

Cited by 21 publications

(6 citation statements)

References 15 publications

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“…The Marifil Volcanic Complex (Figure 1) represents the Lower Jurassic. Its lower section, the Puesto Piris Formation (Núñez et al., 1975), includes conglomerate, sandstone, limestone and tuff of continental rift origin (Strazzere et al., 2019). The upper section is compounded by a thick sequence of ignimbrites, tuff, volcanic breccias and subvolcanic bodies assigned to the Aguada del Bagual and La Porfia formations.…”

Section: Geological Settingmentioning

confidence: 99%

Gravity and magnetic exploration applied to iron ore deposits in the Sierra Grande area, Río Negro Province, Argentina

Bahía,

Strazzere,

Benedini

et al. 2023

Geophysical Prospecting

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The Ordovician–Devonian Sierra Grande Formation, Río Negro Province, Argentina contains three quarzitic members with two iron horizons. Its South Deposit includes both iron horizons. However, the East Deposit is relatively unknown, lacking information about geometry, depth and reserves. To answer these questions, we apply geophysical methods for the rapid evaluation of the East Deposit, using gravity and magnetic measures. The processing of these data allows the suggestion of two 2D models for calculating thicknesses, angles and depth of the iron horizons. The adjustments between the calculated and the observed curve are less than 6%. One model proposes the existence of the Alfaro iron horizon, and the other one proposes the presence of the Rosales iron horizon at depth. The Bouguer anomaly gravimetric maps allow us to calculate the mineral mass, resulting in 125 million iron tons. Thus, this study allowed us to calculate the thicknesses, angles and depth of both iron horizons, and to adjust and evaluate the mineral reserves with the maximum reliability that potential methods allow when applied to mineral prospecting. These results provide new and valuable information for future mining prospects.

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Section: Geological Settingmentioning

confidence: 99%

Gravity and magnetic exploration applied to iron ore deposits in the Sierra Grande area, Río Negro Province, Argentina

Bahía,

Strazzere,

Benedini

et al. 2023

Geophysical Prospecting

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“…1999;Rapela et al . 2000;Strazzere et al . 2017;Pavón Pivetta et al 2019Gordon and Ort, 1994, Rapela et al .…”

Section: -The Early Jurassic Volcanism Of Central Patagonia Forms An Extensiveunclassified

Lower Jurassic felsic diatreme volcanism recognized in central Patagonia as evidence of along-strike rift segmentation

Benedini

Pivetta

Marcos

et al. 2021

Journal of South American Earth Sciences

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…Although the radiometric ages of these rocks start in the Middle Triassic and continue until the Middle Jurassic, González et al (2017a) pointed out that there are two main groups of ages for this range between Valcheta and Sierra Grande towns: Middle Triassic (Cortés, 1981;Genovese, 1995;González et al, 2014González et al, , 2017b; and Early Jurassic (Rapela and Pankhurst, 1993;Pankhurst and Rapela, 1995;Strazzere et al, 2019). Younger ages (Middle Jurassic) were obtained southwards in Península Camarones and Dique Ameghino (Feraud et al, 1999;Pankhurst et al, 2000).…”

Section: Marifil Volcanic Complexmentioning

confidence: 99%

“…This unit was defined by Nuñez et al (1975) for epiclastic rocks at the base of Mesozoic volcanicsedimentary sequences laying on Palaeozoic units. This formation is a 150 m to 550 metresthick sequence that has a grain-decreasing tendency and includes thick beds of conglomerate at the base grading to sandstones, limestones and siltstones at the top of the sequence (Nuñez et al, 1975;Strazzere et al, 2019). These rocks have been related to the evolution of highenergy fluvial currents to low-energy fluvial and lacustrine (Strazzere et al, 2019).…”

Section: Marifil Volcanic Complexmentioning

confidence: 99%

“…This formation is a 150 m to 550 metresthick sequence that has a grain-decreasing tendency and includes thick beds of conglomerate at the base grading to sandstones, limestones and siltstones at the top of the sequence (Nuñez et al, 1975;Strazzere et al, 2019). These rocks have been related to the evolution of highenergy fluvial currents to low-energy fluvial and lacustrine (Strazzere et al, 2019). Based on its stratigraphic position, the Puesto Piris Formation was proposed as Triassic in age (Nuñez et al, 1975).…”

Section: Marifil Volcanic Complexmentioning

confidence: 99%

See 1 more Smart Citation

Late Permian-Early Jurassic vertebrate tracks from patagonia: Biochronological inferences and relationships with southern african realms

Díaz-Martínez

Citton

Valais

et al. 2019

Journal of African Earth Sciences

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The Puesto Piris Formation: Evidence of basin-development in the North Patagonian Massif during crustal extension associated with Gondwana breakup

Cited by 21 publications

References 15 publications

Gravity and magnetic exploration applied to iron ore deposits in the Sierra Grande area, Río Negro Province, Argentina

Gravity and magnetic exploration applied to iron ore deposits in the Sierra Grande area, Río Negro Province, Argentina

Lower Jurassic felsic diatreme volcanism recognized in central Patagonia as evidence of along-strike rift segmentation

Late Permian-Early Jurassic vertebrate tracks from patagonia: Biochronological inferences and relationships with southern african realms

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