Article
Geochemistry & Geophysics
Victoria M. Buford Parks, Nadine McQuarrie, Sarah Falkowski, Nicholas D. Perez, Todd A. Ehlers
Summary: This study assesses the impact of fold-thrust belt driven deformation on topographic evolution, bedrock exhumation, and basin formation in the southeastern Peruvian Andes. By using a model and analyzing thermochronology samples, it reveals the influences of canyon incision, uplift timing and rates, and changes in upper plate compression on the landscape and rock exposure.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Environmental Sciences
Holly Moulton, Mark Carey
Summary: The Peruvian Andes has faced climate change induced glacial lake outburst floods (GLOFs) that threaten the lives of the region's residents. However, the everyday adaptations of marginalized populations, especially Quechua women, are often overlooked in favor of a focus on glacier and water management to prevent GLOFs. This article introduces a feminist framework called "futuremaking" that challenges the current adaptation policy paradigm by prioritizing women's everyday needs and desires.
ENVIRONMENTAL SCIENCE & POLICY
(2023)
Article
Geochemistry & Geophysics
Benjamin Gerard, Xavier Robert, Laurence Audin, Pierre G. Valla, Matthias Bernet, Cecile Gautheron
Summary: The study quantifies exhumation and uplift patterns in the Abancay Deflection since 40 million years ago, revealing a moderate and steady exhumation but with an acceleration of uplift in the recent 5 million years, indicating active tectonics and river incision.
Article
Geosciences, Multidisciplinary
Jan Klimes, Jan Novotny, Alejo Cochacin Rapre, Jan Balek, Pavel Zahradnicek, Tazio Strozzi, Hamid Sana, Holger Frey, Milos Rene, Petr Stepanek, Jan Meitner, Johan Junghardt
Summary: This study analyzes the impact of a 2002 rock avalanche in the Cordillera Blanca region of Peru based on detailed historical data and engineering geological slope models, emphasizing the long-term effects on slope stability. The results show that rock slope stability is influenced by discontinuous slip planes and rock bridges.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Meteorology & Atmospheric Sciences
Emily R. R. Potter, Catriona L. L. Fyffe, Andrew Orr, Duncan J. J. Quincey, Andrew N. N. Ross, Sally Rangecroft, Katy Medina, Helen Burns, Alan Llacza, Gerardo Jacome, Robert A. Hellstrom, Joshua Castro, Alejo Cochachin, Nilton Montoya, Edwin Loarte, Francesca Pellicciotti
Summary: This article explores the importance of runoff from glacierised Andean river basins for sustaining livelihoods and analyzes past and future climatic trends through climate modeling. The study reveals substantial increases in temperature and precipitation, as well as an intensification of extreme precipitation events and meteorological droughts. Despite higher precipitation, glacier mass losses are projected to increase. These findings highlight the combined and contrasting risks in a region already undergoing rapid environmental change.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2023)
Article
Geochemistry & Geophysics
K. Fraser, E. Enkelmann, S. Jess, H. Gilbert, R. Grieco
Summary: The article discusses the formation of the Rocky Mountain Trench and its cooling history in the central eastern British Columbia. The study reveals multiple phases of rapid cooling during different geological periods, indicating multiple tectonic events in the Cenozoic era.
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
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
Geography, Physical
Willem Viveen, Jorge Sanjurjo-Sanchez, Miluska A. Rosas, Veerle Vanacker, Juan Carlos Villegas-Lanza
Summary: The late Quaternary fluvial valley development in Peru is driven by summer insolation maxima, but not always coincides. Tectonic uplift has not been considered in the current terrace formation models. The chronology of Canete River's terraces corresponds to Heinrich events and rising lake levels in the Andes.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Geosciences, Multidisciplinary
Lorenz Hanchen, Cornelia Klein, Fabien Maussion, Wolfgang Gurgiser, Pierluigi Calanca, Georg Wohlfahrt
Summary: In the semi-arid Peruvian Andes, researchers found a significant increase in plant-available water over the past 20 years, particularly during the dry season, using satellite data. The study also revealed a large variation in the start time of the growing season, which has important implications for the length of the growing season.
EARTH SYSTEM DYNAMICS
(2022)
Article
Environmental Sciences
Rayees Ahmed, Gowhar Farooq Wani, Syed Towseef Ahmad, Riyaz Ahmad Mir, Abdullah-Al-Faisal, Abid Farooq Rather, Sajjad Saeed
Summary: The dramatic mass loss of Tropical Andean glaciers has caused alterations in regional hydrological regimes, including the development and expansion of glacial lakes. This study provides an updated inventory of Moraine-Dammed Glacial Lakes in the Cordillera Blanca region and analyzes the changes in lake area over a 40-year period. The study also examines past Glacial Lake Outburst Flood events and concludes that the region is highly prone to GLOFs.
EARTH SYSTEMS AND ENVIRONMENT
(2023)
Article
Geography, Physical
Anna Sorrentino, Ettore Valente, Nicola Mondillo
Summary: The topography and river landscape morphometry of the Utcubamba River and the Chiriaco River basins revealed the relationship between vertical movements and the genesis of supergene Zn deposits. The research used various parameters to analyze the elevations, relief, profiles, and slope/area to determine the normalized channel steepness index. The results showed that the Utcubamba River basin experienced long-lasting uplift, while the Chiriaco River basin experienced more recent uplift.
Article
Multidisciplinary Sciences
Erika Rodriguez-Munoz, Camilo Montes, Fernando J. M. Rojas-Runjaic, Andrew J. Crawford
Summary: The study evaluated vicariance between lowland populations in the Colombian and Venezuelan Andes, finding that most divergences occurred during the Pliocene and Quaternary periods. Divergence times were relatively recent and likely influenced by organism-environment interactions during Pleistocene climate oscillations, or dispersal through portals across the Andes.
Review
Plant Sciences
Oscar Alejandro Perez-Escobar, Alexander Zizka, Mauricio A. Bermudez, Andrea S. Meseguer, Fabien L. Condamine, Carina Hoorn, Henry Hooghiemstra, Yuanshu Pu, Diego Bogarin, Lydian M. Boschman, R. Toby Pennington, Alexandre Antonelli, Guillaume Chomicki
Summary: This study provides a synthesis of the vascular plant diversity in the Andes and reveals that the Northern Andean mid-elevation cloud forests are the most species-rich ecosystems. The Andes play a crucial role as a source and sink of Neotropical plant diversity, and there have been significant biotic interchanges between the Andes, Amazonia, and other Neotropical biomes throughout history.
TRENDS IN PLANT SCIENCE
(2022)
Article
Geography, Physical
Christian Halla, Jan Henrik Bloethe, Carla Tapia Baldis, Dario Trombotto Liaudat, Christin Hilbich, Christian Hauck, Lothar Schrott
Summary: Quantification of ice and water content in active rock glaciers in the Andes of Argentina is crucial for estimating their role as water stores and contributors to runoff in dry mountain catchments. Despite their potential as important water reservoirs, water storage capacities and interannual changes have not been quantified in detailed field studies.
Article
Geochemistry & Geophysics
Carlos Benavente, Sam Wimpenny, Lorena Rosell, Xavier Robert, Anderson Palomino, Laurence Audin, Enoch Aguirre, Briant Garcia
Summary: A study reveals a significant earthquake occurred in the early 15th century along the Incapuquio Fault System, causing substantial net slip and posing potential seismic hazards to surrounding communities. This seismic event may also be linked to the collapse of the Chiribaya civilization. Additionally, the forearc in South Peru experiences a complex pattern of permanent strain, with evidence of various deformation processes in close proximity.
Article
Geochemistry & Geophysics
Benjamin Gerard, Xavier Robert, Laurence Audin, Pierre G. Valla, Matthias Bernet, Cecile Gautheron
Summary: The study quantifies exhumation and uplift patterns in the Abancay Deflection since 40 million years ago, revealing a moderate and steady exhumation but with an acceleration of uplift in the recent 5 million years, indicating active tectonics and river incision.
Article
Geochemistry & Geophysics
Andy Combey, Diego E. Mercerat, Philippe Gueguen, Mickael Langlais, Laurence Audin
Summary: This study presents the results of a seismic monitoring survey carried out on a historic masonry tower to analyze the dynamic response of ancient masonry structures. The study reveals that different types of vibrations induce variations in the building's response, and it confirms the nonlinear elastic behavior of masonry structures under seismic and atmospheric loadings. Furthermore, the correlation between material heterogeneities and the nonlinear threshold supports the significance of such monitoring surveys in future modeling and conservation efforts.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Geochemistry & Geophysics
L. Marconato, P. H. Leloup, C. Lasserre, R. Jolivet, S. Caritg, R. Grandin, M. Metois, O. Cavalie, L. Audin
Summary: This study investigates the 2019 Le Teil earthquake in France using various methods and analyzes the geological model and post-seismic displacement. The study found that the La Rouviere Fault near the epicenter of the earthquake was reactivated, and the distribution and depth of fault slip were determined. This study is of great significance for reevaluating the seismic hazard of many faults, including the La Rouviere Fault system.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Engineering, Marine
Amin Rashidi, Denys Dutykh, Nasser Keshavarz, Laurence Audin
Summary: This study evaluates the tsunami hazard posed by splay thrust and normal faults in the western Makran region and Gulf of Oman for the first time. Seismic data is used to interpret these faults and analyze the potential tsunami hazards. The results highlight the need for increased attention to the hazards posed by these faults in the Makran subduction zone, particularly the normal faults. The highest impact of tsunami waves is observed in Jask and Muscat, and inundation modeling reveals their ability to penetrate into inland areas. The deaggregation analysis shows a significant contribution to the local tsunami hazard from normal faults. The probability of tsunami wave heights exceeding 1 meter and 3 meters in the Gulf of Oman Basin over a 250-year period is found to be 1 and 0.8, respectively.
Article
Geochemistry & Geophysics
Benjamin Gerard, Xavier Robert, Djordje Grujic, Cecile Gautheron, Laurence Audin, Matthias Bernet, Melanie Balvay
Summary: In this study, new zircon (U-Th)/He (ZHe) ages and zircon fission track (ZFT) ages were analyzed from an age-elevation profile in Machu Picchu, Peru. The ZFT data showed older ages compared to other thermochronological data, while the ZHe data interestingly showed ages similar to apatite (U-Th)/He (AHe). It was proposed that He retention in zircon is linked to the damage dose, with a closure temperature that varies with alpha-dose. The study suggests that the closure temperature of ZHe at low alpha-dose ranges from 6 x 10(15) to 4 x 10(16) alpha/g, and is lower than previously thought. These findings strengthen previous geological conclusions and highlight a cooling rate at Machu Picchu that is approximately twice as important as deduced from AHe and apatite fission track data alone.
Article
Multidisciplinary Sciences
Benjamin Gerard, Xavier Robert, Laurence Audin, Cecile Gautheron, Matthias Bernet
Summary: The Apatite (U-Th)/He and apatite fission-track (AFT) thermochronology provide important information about the thermal evolution of the upper crust and can help distinguish between different exhumation mechanisms. In this study, these methods were applied to extract the thermal evolution of the upper crust in the Abancay Deflection. The obtained data allows exploration of crust evolution from the late-Eocene to the Quaternary.
Article
Geosciences, Multidisciplinary
S. Carretier, F. Audemard, L. Audin, S. Hidalgo, J-l. Le Pennec, H. Mora, J-m. Nocquet, P. Samaniego
Summary: The International Symposium on Andean Geodynamics (ISAG) is an international conference held every 3-4 years in different European cities to review the state of knowledge in geosciences on the Andes. In 2019, the symposium took place in Ecuador for the first time and featured papers on topics such as tectonics and volcanism.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
P. A. Espin Bedon, L. Audin, M. -P. Doin, V. Pinel, E. Pathier, P. Mothes, A. Garcia, P. Samaniego, D. Pacheco
Summary: In 2016, a sudden increase in seismic activity was observed at the Cayambe volcano in Ecuador, possibly triggered by magma ascent, leading to the need for a reevaluation of volcanic hazards around the dormant ice-covered volcano.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geography, Physical
Andy Combey, Laurence Audin, David Gandreau, Carlos Benavente, Lorena Rosell, Leo Marconato
Summary: Devastating earthquakes in historical times have left the Cusco Basin vulnerable, with dense urbanization adding to the risk. However, the lack of data on past seismic activity makes it challenging to assess the earthquake hazards accurately. Through an archaeoseismological survey of Inca sites near Cusco, we have identified evidence of seismic deformation and confirmed the occurrence of significant ancient earthquakes. This study highlights the need for further research on faults near Cusco to better understand seismic risks.
QUATERNARY INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Audrey Margirier, Manfred R. Strecker, Peter W. Reiners, Stuart N. Thomson, Ismael Casado, Sarah W. M. George, Alexandra Alvarado
Summary: The subduction of the Carnegie Ridge at 6-5 Ma significantly impacted late Cenozoic magmatism and tectonic activity in the northern Andes by increasing plate coupling and promoting upper-plate deformation. The study highlights the essential role of bathymetric highs in driving regional deformation at non-collisional convergent plate margins.
Article
Geosciences, Multidisciplinary
Swann Zerathe, Laurence Audin, Xavier Robert, Stephane Schwartz, Julien Carcaillet
Summary: New Be-10 surface exposure dating on the Limaxina landslide in northern Chile reveals that it occurred 80 +/- 4 ka ago, which is consistent with other local records of a wet episode in the Atacama Desert. This suggests that climate-forcing plays a primary role in landslide activity in this region, calling for further dating of slope failures in the arid Central western Andes to explore responses to Quaternary climate oscillations and extreme events.
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.
