Article
Geosciences, Multidisciplinary
Cecilia del Papa, Patricio Payrola, Heiko Pingel, Fernando Hongn, Margarita Do Campo, Edward R. Sobel, Ayelen Lapiana, John Cottle, Johannes Glodny, Manfred R. Strecker
Summary: This study examines the evolution history of the Calchaqui region in the southern part of the northeast Argentinian Eastern Cordillera through sedimentology, geochemistry, mineralogy, and geochronology, combined with structural data and fault modeling. The results show that a compartmentalization of the foreland with restricted fluvial networks occurred around 9 million years ago.
Article
Geochemistry & Geophysics
Mitchell McMillan, Lindsay M. Schoenbohm, Alexander Tye, Malcolm F. McMillan, Renjie Zhou
Summary: Cordilleran orogens in the Central Andes are influenced by lithospheric deformation and exhumation, but little is known about the timing and mechanisms in the high-elevation Puna Plateau. This study provides insights into the history and style of orogenic deformation in the Antofalla region using various methods. The results show a protracted period of shortening during the Eocene and Early Miocene, followed by a transient episode of upper-crustal extension in the Late Miocene. Eastern-western shortening returned in the Pliocene-Quaternary. The structural cross-section reveals a low magnitude of shortening compared to the thick crust. The region experienced little exhumation or sedimentation during the Mesozoic, possibly retaining a thickened crust from Paleozoic orogenesis.
Article
Geosciences, Multidisciplinary
Juan Pablo Villalba Ulberich, Claudia Ines Galli, Juan Rafael Franzese
Summary: The Tres Cruces basin provides a valuable record of deposits related to the Andean orogeny in the Eastern Cordillera, Central Andes. The Cenozoic synorogenic deposits are up to 5000 m thick, showing a transition from a distal to proximal foreland. The sedimentological characteristics of the deposits suggest a tectonic uplift of the orogenic front to the west, impacting the development of local highlands.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
Willemijn S. M. T. van Kooten, Edward R. Sobel, Cecilia E. del Papa, Patricio Payrola, Johannes Glodny
Summary: In the Central Andes of NW Argentina, the distribution and style of deformation is strongly influenced by pre-Cenozoic heterogeneities, particularly related to the Salta rift extension in the Cretaceous. The Tilcara Range and San Lucas block in the Eastern Cordillera exhibit evidence of multiple exhumation events. Through low-temperature thermochronology data set, the multi-phase exhumation history of the Eastern Cordillera of NW Argentina is quantified.
Article
Geosciences, Multidisciplinary
Joaquin Bucher, Damian Moyano Paz, Manuel Lopez, Leandro D'Elia, Andres Bilmes, Augusto Varela, Micaela Garcia, Rodrigo Feo, Tomas Fuentes, Juan Franzese
Summary: The study analyzed a Miocene synorogenic and volcaniclastic succession in the Northpatagonian Andean foreland region, identifying different depositional systems and discussing the influence of tectonic and climatic changes on their evolution. By conducting a detailed sedimentological and stratigraphic analysis, the researchers defined eight facies associations and observed variations in the depositional systems in response to synchronous tectonic and climatic changes. The role of allogenic controls, including tectonic reconfiguration and regional aridization, in shaping the paleoenvironmental evolution of the basin was also discussed.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Diego Jaldin, A. Tibaldi, F. L. Bonali, L. Giambiagi, D. Espinoza, K. Luengo, A. Santander, E. Russo
Summary: This study investigates the relationship between faulting, tectonic stress, and volcanic activity in the Western Cordillera of Chile. Results suggest that volcano distribution is mainly controlled by variations in the stress field related to the growth and collapse of the Puna Plateau. Magma emplacement is guided by fractures parallel to the compression direction, regardless of the horizontal stress.
BULLETIN OF VOLCANOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Facundo Fuentes
Summary: Regional cross-sections reveal the complex geometry and deformation mechanisms of the Tierra del Fuego fold-thrust belt. The dominant mechanisms include a duplex thrust system in the Cretaceous and detachment and faulted detachment anticlines in the Cenozoic. Fault-bend and fault-propagation folds are also present, while basement fault reactivation is limited. The region has potential for hydrocarbon exploration, with untested large anticlines preserving Cenozoic reservoirs.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2023)
Article
Geosciences, Multidisciplinary
Carolina Montero-Lopez, Fernando Hongn, Romina L. Lopez Steinmetz, Alejandro Aramayo, Heiko Pingel, Manfred R. Strecker, John M. Cottle, Carlos Bianchi
Summary: The study of the structural and topographic evolution of orogenic plateaus in the Andean region reveals tectonic shortening and irregular deformation patterns during the early Cenozoic period. The findings suggest that Paleogene deformation along the eastern margin of the present-day plateau may be related to reactivated basement heterogeneities from regional Paleozoic mountain building.
Article
Geology
Jonathan Ledesma, Cecilia E. Del Papa, Patricio Payrola
Summary: This study analyzes the eolian record of the San Antonio de los Cobres basin in the eastern border of the Puna Plateau in Argentina, revealing that the winds in this region have been blowing constantly from the north-northwest for at least the last 8 million years, indicating a similar atmospheric circulation pattern to the present-day one.
JOURNAL OF SEDIMENTARY RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Peter Kuhry, Eirini Makopoulou, Didac Pascual Descarrega, Ivanna Pecker Marcosig, Dario Trombotto Liaudat
Summary: This study presents the first detailed inventory of soil organic carbon (SOC) in a high mountain permafrost zone in the Central Andes. The study finds that plant cover is the main control on SOC storage, with wet meadow areas having the highest storage. The study also projects that future temperature increases will result in an upward shift of the upper vegetation belt, creating new areas of phytomass carbon and SOC storage.
Article
Geochemistry & Geophysics
Nian Chen, Warren Pratt, Jingwen Mao, Guiqing Xie, Michel Moisy, Alan Santos, Weimin Guo, Wei Zheng, Junan Liu
Summary: The Rio Blanco porphyry Cu-Mo deposit in northern Peru is characterized by a thick supergene enrichment blanket and unusual terrain. It formed during three magmatic-hydrothermal cycles, with cycle 1 being the most important. The deposit has a complex geological history spanning millions of years, with metal introduction primarily occurring during the first cycle.
Article
Geography, Physical
Fernanda S. Santos, Carlos A. Sommer, Mauricio B. Haag, Walter A. Baez, Alberto T. Caselli, Alejandro D. Baez
Summary: Monogenetic volcanoes are common volcanic landforms on Earth. The Southern Volcanic Zone of the Andes is one of the most active magmatic regions and is characterized by the presence of monogenetic volcanoes in the Zapala Volcanic Field. Compared to monogenetic fields in the Central Andes, the Zapala Volcanic Field has higher vent densities and more phreatomagmatic landforms.
Article
Geosciences, Multidisciplinary
Laurence Audin, Benjamin Gerard, Cecile Gautheron, Stephane Schwartz, Carlos Benavente, Xavier Robert, Peter van der Beek, Rosella Pinna-Jamme, Melanie Balvay, Matthias Bernet, Audrey Margirier, Swann Zerathe
Summary: Thermochronological data is crucial for understanding the thermal and exhumation histories of active mountain ranges. However, in the Central Andes, the lack of bedrock outcrops and the presence of volcanic formations have limited the investigation of the exhumation history of the Western Cordillera. This study presents new thermochronological data from the Canete Canyon, indicating the importance of considering burial associated with thick volcanic formations when interpreting data from this region.
Article
Geosciences, Multidisciplinary
Maria J. Adad, Romina L. Lopez Steinmetz, Federico M. Davila
Summary: The formation of the Andean basin is associated with different geological settings, with Pozuelos Basin in the Puna region being a key area for understanding basin formation hypotheses. Through seismic data interpretation and field surveys, the evolution of Pozuelos Basin during the Cenozoic era was studied, revealing basement thrusting and deformation along its eastern boundary. The basin configuration in late Miocene was isolated and intermontane, whereas during Late Oligocene to Middle Miocene, it behaved as a disconnected depositional zone in an intermontane broken foreland setting.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
David Eric Tineo, Damian Moyano-Paz, Augusto Nicolas Varela, Daniel Gustavo Poire
Summary: This study provides original data on the depositional conditions of the Tranquitas Formation and the role of tectonic and climate influences on these conditions. The results suggest two major intervals in the Tranquitas Formation and describe different facies associations within these intervals. Clay mineral analysis indicates long-term climate change and its effect on the deposition of the basin's distal area. The findings also allow for correlation with other formations in the Chaco foreland basin.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
