Article
Geochemistry & Geophysics
Andrew Hurst, Michael J. Wilson, Antonio Grippa, Lyudmyla Wilson, Giuseppe Palladino, Claudia Belviso, Francesco Cavalcante
Summary: The mineralogy of mudstone samples from the Moreno and Kreyenhagen formations were analyzed using X-ray diffraction (XRD) and X-ray fluorescence (XRF), showing that smectite is the predominant phyllosilicate present. Smectite in the Moreno Formation was derived from volcaniclastic debris, while in the Kreyenhagen Formation it was from intense sub-tropical weathering of granitoid-dioritic terrane, indicating different sources for the two formations. The samples had chemical indices of alteration indicative of intense weathering of source terrane, with ferriferous enrichment and presence of kaolinite contributing evidence for the intensity of weathering.
Article
Multidisciplinary Sciences
Shuangwen Sun, Yue Fang, Yongcan Zu, Lin Liu, Kuiping Li
Summary: The research findings suggest that there has been a significant increase in early positive Indian Ocean Dipole (pIOD) in the past decades, reaching the same frequency as the canonical pIOD. The increase is attributed to the intensified Bjerknes feedback and an early summer monsoon onset, which acts as the major trigger for early pIOD. Model simulations indicate that the increased frequency of early pIOD is likely to continue under greenhouse warming, leading to greater climate variability and more climate extremes in the affected regions.
Article
Geosciences, Multidisciplinary
D. D. Bokuchava, V. A. Semenov
Summary: The Early 20th Century Warming in the northern high latitudes was comparable in magnitude to the present-day warming, but occurred at a time when the growth in atmospheric greenhouse gases was significantly less than in the last 40 years. The causes of ETCW remain a matter of debate, with a combination of internal variability and external natural and human impacts likely playing a role in this climate anomaly.
EARTH-SCIENCE REVIEWS
(2021)
Article
Multidisciplinary Sciences
Yifeng Wang, Michael Wang
Summary: This article explores the characteristics of small particle sizes and complex layer stacking in clays and suggests that these arise from the lack of long-range order in low-dimensional systems. By treating clay minerals as separate 2D and quasi-1D systems, the study allows for a systematic prediction of clay particle size distributions and layer stacking.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Jamie I. Farquharson, Falk Amelung
Summary: Continued global warming is projected to increase extreme heavy rainfall in most subaerial volcanic regions, leading to an increased potential for rainfall-induced volcanic hazards. If global warming goes unchecked, more than 700 volcanoes globally may experience an increase in primary and secondary rainfall-related volcanic activity.
ROYAL SOCIETY OPEN SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
A. Zorzi, S. M. Tikoo, G. C. Beroza, N. H. Sleep
Summary: The impacts associated with the Marquez Dome and Boltysh craters were too small to cause hyperthermal-like temperature changes, and large impacts are predicted to be uncommon during the Cenozoic era.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Studies
Benjamin Franta
Summary: The discovery of a newly revealed archival document shows that the American Petroleum Institute was spreading false information about climate change as early as 1980, indicating the early use of public-facing misinformation by the petroleum industry. This suggests that commercial fossil fuel interests played a more obstructive role in climate change discourse and policy during the 1980s than previously understood.
ENVIRONMENTAL POLITICS
(2021)
Article
Geology
Lauren K. O'Connor, Emily Dearing Crampton-Flood, Rhodri M. Jerrett, Gregory D. Price, B. David A. Naafs, Richard D. Pancost, Paul McCormack, Aris Lempotesis-Davies, Bart E. van Dongen, Sabine K. Lengger
Summary: A study of fossil peats in Canada suggests that the average annual air temperature during the end of the Cretaceous and the beginning of the Paleogene varied, with the highest temperature reaching 29°C. The range of temperature change on land is greater than that derived from marine proxy records. These findings help us better understand the temperature changes on land during the critical period of dinosaur extinction and the rise of mammals.
Review
Engineering, Marine
Emanuele Somma, Antonio Terlizzi, Maria Costantini, Madalena Madeira, Valerio Zupo
Summary: The successions of benthic communities are influenced by the first colonizers, such as bacteria, diatoms, and invertebrate larvae. The process is dynamic and can be affected by global warming and ocean acidification. However, the impact of these global stressors on benthic ecosystems is still poorly understood.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Geography, Physical
Gabriela J. Arreguin-Rodriguez, Ellen Thomas, Laia Alegret
Summary: This study analyzes the impact of Paleogene warming events on ocean bottom water ecosystems by examining deep-sea benthic foraminifera. The results show that these events generally lead to decreased diversity and increased variation, indicating unstable environmental conditions. The most severe events, the Paleocene-Eocene Thermal Maximum and Eocene Thermal Maximum 2, had a major impact on bottom water ecosystems, while middle Eocene warming events did not show significant changes in diversity. The overall cooler middle Eocene conditions supported higher faunal diversity and stability of benthic foraminiferal assemblages.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Meng Wei, Qi Shu, Zhenya Song, Yajuan Song, Xiaodan Yang, Yongqing Guo, Xinfang Li, Fangli Qiao
Summary: The study found that although there have been some improvements in the CMIP6 models compared to CMIP5, most models still fail to reproduce the global warming slowdown. However, the models that were able to successfully reproduce the slowdown demonstrated relatively high skills in simulating the long-term warming trend and three key-scale natural variabilities.
SCIENCE CHINA-EARTH SCIENCES
(2021)
Article
Chemistry, Physical
I. Campana, J. G. Wynn, J. Iglesias-Cibanal, A. Benito-Calvo, A. Alvaro-Gallo, L. Bermejo, A. Perez-Gonzalez, J. M. Bermudez de Castro
Summary: The isotopic composition of water used in pre-treatment solutions has an influence on the isotopic composition of clay minerals. While HCl pre-treatment significantly alters the clay minerals, H2O2 pre-treatment has negligible effects. The variability in the alteration mainly depends on clay mineralogy, especially the quantity of smectite.
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Physical
Nadine J. Kanik, Fred J. Longstaffe, Artur Kuligiewicz, Arkadiusz Derkowski
Summary: The study investigated the impact of different interlayer cations on the hydrogen isotope composition of smectites, proposing a new protocol for determining the hydroxyl delta 2H in smectitic clay minerals. The findings also revealed the effect of H-isotope fractionation of adsorbed water during sample preparation.
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Roberts Blukis, Maria Schindler, Thais Couasnon, Liane G. Benning
Summary: Saponite, a clay mineral, is widely used in the chemical industry and nanocomposites. Current synthetic methods for saponite with specific properties are limited due to the lack of understanding of its formation mechanism and properties. Understanding the formation mechanism of saponite is crucial for synthesizing materials with specific properties.
Article
Geochemistry & Geophysics
P. Blanc, F. Gherardi, P. Vieillard, N. C. M. Marty, H. Gailhanou, S. Gaboreau, B. Letat, C. Geloni, E. C. Gaucher, B. Made
Summary: The computing tools ClayTherm and ISTherm are developed for estimating the thermodynamic properties of clay minerals and illite/smectite mineral series. They combine previously published estimation models and can calculate the thermodynamic properties of minerals based on their compositions. The tools have been successfully applied to natural geological samples, providing valuable insights into mineralogical observations and geochemical analyses.
APPLIED GEOCHEMISTRY
(2021)
Article
Geology
Alejandro R. Gomez-Dacal, Lucia E. Gomez-Peral, Luis A. Spalletti, Alcides N. Sial, Aron Siccardi, Daniel G. Poire
Article
Paleontology
Sebastian Richiano, Marina Aguirre, Ester Farinati, Karen Davies, Ignacio Castellanos, Lucia E. Gomez-Peral
Article
Geography, Physical
M. Sol Raigemborn, Veronica Krapovickas, Elisa Beilinson, Lucia E. Gomez Peral, Alejandro F. Zucol, Luciano Zapata, M. Richard F. Kay, M. Susana Bargo, Sergio F. Vizcaino, Alcides N. Sial
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2018)
Article
Geology
Alejandro R. Gomez Dacal, Sebastian M. Richiano, Lucia E. Gomez Peral, Luis A. Spalletti, Alcides N. Sial, Daniel G. Poire
CRETACEOUS RESEARCH
(2019)
Article
Geosciences, Multidisciplinary
Sebastian Richiano, Lucia E. Gomez-Peral, Augusto N. Varela, Alejandro R. Gomez Dacal, Claudia E. Cavarozzi, Daniel G. Poire
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2019)
Article
Geosciences, Multidisciplinary
Lucia E. Gomez-Peral, M. Sol Raigemborn, Sebastian Richiano, M. Julia Arrouy, A. Lorena Odino-Barreto, Leandro M. Perez, Alcides N. Sial, Camila Ferreyra
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2019)
Article
Geosciences, Multidisciplinary
Maria Julia Arrouy, Claudio Gaucher, Daniel G. Poire, Shuhai Xiao, Lucia E. Gomez Peral, Lucas V. Warren, Natalia Bykova, Fernanda Quaglio
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2019)
Article
Geosciences, Multidisciplinary
Lucia E. Gomez-Peral, Maria Julia Arrouy, Daniel G. Poire, Claudia E. Cavarozzi
PRECAMBRIAN RESEARCH
(2019)
Article
Geography, Physical
M. L. Aguirre, S. Richiano, A. H. L. Voelker, D. L. Dettman, B. R. Schoene, H. O. Panarello, M. Donato, L. Gomez Peral, L. E. Castro, R. Medina
GLOBAL AND PLANETARY CHANGE
(2019)
Article
Geosciences, Multidisciplinary
M. Julia Arrouy, Lucia E. Gomez-Peral
Summary: This study outlines the outstanding attributes and inferred depositional controls for dark mudstones of the Alicia Formation, revealing the intrinsic characteristics of unknown Ediacaran marine depositional conditions. The research combines stratigraphic characterization with detailed facies descriptions, petrography, XRD, SEM, and geochemistry analyses to provide evidence of middle Ediacaran anoxia in the Tandilia Basin. The data suggest a link between the depositional setting during most severe redox changes within the SW Gondwana scenario.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Lucia E. Gomez-Peral, Maria Julia Arrouy, Sebastian Richiano, Abril Cereceda, Sebastian A. Ale, Daniel G. Poire
Summary: The Cryogenian Period is characterized by two global glaciations, Sturtian and Marinoan, which led to significant climate and sea level changes. The study of the Villa Monica Formation in Central Argentina provides insights into sedimentary facies variations and stromatolite development in a post-glaciation, phosphorus-rich ocean. Further research is needed to understand the paleoenvironmental models and regional correlation of this unit.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
A. Lorena Odino-Barreto, Lucia E. Gomez-Peral, Sebasti Richiano, Marcos Macchioli Grande, Ailen Borya, Daniel G. Poire, Anelize M. Bahniuk, Leonardo F. Cury
Summary: The study analyzed sandstones from the Calafate Formation in the Austral-Magallanes Basin in Patagonia using petrographical, X-ray diffraction (XRD) and geochemical data. Three intervals with different compositions were identified, indicating varying sediment sources. The composition shift observed in the middle interval suggests sediment supply from the juvenile Andean arc.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geography, Physical
M. Sol Raigemborn, Sabrina Lizzoli, Ethan Hyland, Jennifer Cotton, Lucia E. Gomez Peral, Elisa Beilinson, J. Marcelo Krause
Summary: This study is of significant importance for understanding climatic changes in the Southern Hemisphere during the Eocene.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Lucia E. Gomez-Peral, M. Julia Arrouy, M. Sol Raigemborn, Camila Ferreyra, Victoria Penzo, Alcides N. Sial, Daniel G. Poire
Summary: The sedimentary infill of the Tandilia Basin underwent four different stages of deposition during the Neoproterozoic, two of which are visible in the Sierras Bayas Group and two in the La Providencia Group. The Villa Monica Formation represents the initial stage of basin infill and consists of a lower siliciclastic section transitioning into an upper dolostone section. The dolostone platform contains Cryogenian stromatolites and exhibits two distinct karst events.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
J. W. L. Afonso, P. Franceschinis, A. E. Rapalini, M. J. Arrouy, L. Gomez-Peral, D. Poire, S. Caetano-Filho, R. I. F. Trindade
Summary: This study presents a magnetostratigraphy coupled with a carbon isotope study in the Ediacaran Avellaneda Formation, which reveals a correlation between magnetic polarity pattern and carbon isotope changes associated with the Shuram excursion. The findings show the potential use of magnetostratigraphy for Precambrian stratigraphic correlation and shed further light on Ediacaran succession correlations.
PRECAMBRIAN RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
David Dominguez-Santos, Daniel Valderrama, Ahmet Utku Yazgan
Summary: This document presents a study comparing the spectra of large-magnitude seismic records in Chile between 2012 and 2022 with the design spectra of NCh433 and D. S 61. The aim is to determine if Chile's seismic-resistant regulations are updated to the existing reality and propose new design spectra that better represent the seismic activity in Chile during the last decade.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Prabhu Palanisamy, Vivek Sivakumar, Priya Velusamy, Logesh Natarajan
Summary: Shoreline changes in the southern coast of Rio de Janeiro, Brazil, were analyzed from 1986 to 2018. The study found that both natural and human factors significantly impact shoreline changes. The findings provided important insights into predicting future shoreline positions and identifying vulnerable regions. Additionally, human activities were found to influence shoreline change models, emphasizing the need for effective management strategies to protect ecosystems and communities.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Irina Salgado Bernal, Periyasamy Sivalingam, Armando Martinez Sardina, Michel Manduca Artiles, Maria E. Carballo Valdes, John Pote
Summary: This study investigated the presence of 15 toxic metals in surface sediment in a tropical river ecosystem in Cuba. The results showed that the sediments had higher concentrations of four metals compared to Cuban norms. Various contamination indices were calculated, and correlations analysis revealed the main sources of contamination. The study provides important information for the management of the river and emphasizes the need for metal pollution control and monitoring.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Camila Morgan, Eduardo Morgado, Miguel-Angel Parada, Raimundo Brahm, Francisca Mallea-Lillo
Summary: Lanin volcano is a composite volcano in the Andes, which has erupted lava flows with different compositions. The volcano's magma reservoir contains a crystal mush, and the pre-eruptive conditions include temperature, pressure, and oxygen fugacity. Fractional crystallisation has led to the evolution of the magma with different compositions.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Benjamin Idini, Sergio Ruiz, Jean-Paul Ampuero, Felipe Leyton, Efrain Rivera
Summary: This study investigates the role of wedge integrity on the frequency content of strong ground motion produced by subduction earthquakes in Northern Chile. The results show that the frequency characteristics of seismic waves vary with hypocentral distance, indicating lateral variations in anelastic attenuation due to the heterogeneous tectonic structure.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2024)