Article
Geosciences, Multidisciplinary
Hanwei Yao, Xi Chen, Runsheng Yin, Stephen E. Grasby, Helmut Weissert, Xue Gu, Chengshan Wang
Summary: Geochemical studies have revealed that oceanic anoxic events (OAEs) are often associated with Large Igneous Province (LIP) volcanism. However, the link between OAE 1d and volcanism had lacked robust evidence until now. By analyzing mercury (Hg) concentrations and isotopic records, researchers found a volcanic Hg anomaly just prior to OAE 1d, consistent with increased sea surface temperatures and atmospheric CO2 levels. This suggests that the eruption of the central portion of the Kerguelen LIP may have driven the onset of OAE 1d through global environmental perturbations.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geography, Physical
Antun Husinec, J. Fred Read, Bozo Prtoljan
Summary: This study provides a comprehensive analysis of the delta(13C) fluctuations and sequence stratigraphy of the Middle and Upper Jurassic strata on the Adriatic Platform. It reveals several significant sea-level changes events and suggests that detailed research on similar thick Jurassic isolated platform successions can provide valuable long-term records of delta(13C), climate, and sea-level changes.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
H. Tsikos, M. Siahi, S. Rafuza, X. R. Mhlanga, P. B. H. Oonk, V. Papadopoulos, A. J. Boyce, P. R. D. Mason, C. Harris, D. R. Groecke, T. W. Lyons
Summary: This study investigated samples from the Kuruman and Griquatown iron-formations of the Transvaal Supergroup in South Africa, revealing new evidence for iron carbonate formation and kinetic isotopic effects related to fluctuating conditions. The results demonstrate the importance of abiotic carbonate formation in the genesis of iron-formations.
Article
Geochemistry & Geophysics
Fred T. Bowyer, Collen-Issia Uahengo, Kavevaza Kaputuaza, Junias Ndeunyema, Mariana Yilales, Ruaridh D. Alexander, Andrew Curtis, Rachel A. Wood
Summary: The advent of animal biomineralization fundamentally changed Earth's history, allowing for the diversification of body plans and the control of carbonate sediment production, resulting in a permanent restructuring of the global carbon cycle.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Charlotte Lauchli, Miguel Garces, Elisabet Beamud, Luis Valero, Louis Honegger, Thierry Adatte, Jorge E. Spangenberg, Julian Clark, Cai Puigdefabregas, Andrea Fildani, Eric de Kaenel, Teodoro Hunger, Andres Nowak, Sebastien Castelltort
Summary: The stratigraphic cycles in the deep marine deposits of the southern central Pyrenees, Spain, are influenced by tectonics, climate, sea-level variations, and sediment supply. By using a combination of geochemical datasets and a new age model, the study discusses the possible drivers of these cycles in the sediment gravity flow deposits.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Stephen M. Rowland, Slava Korolev, James W. Hagadorn, Kaushik Ghosh
Summary: This study describes, interprets, and establishes a stratotype for the Frenchman Mountain Dolostone (FMD), which is a new Cambrian stratigraphic unit that records key global geochemical and climate signals and is well exposed throughout the Grand Canyon and central Basin and Range, USA.
Article
Geosciences, Multidisciplinary
Zaitian Dong, Zetang Wang, Wenli Zhang, Fei Zhao, Yunhang Du, Yuxuan Zhu, Xuehai Fu, Chaoyong Wang
Summary: This study conducted a geochemical investigation of the Tianlin section in the Upper Yangtze Basin in South China to explore the reasons and relationships behind the parallel positive excursions of organic carbon and pyrite sulfur isotopes during the Hirnantian glacial period globally. Results highlight the key roles of microbial sulfate reduction and volcanic activity in driving the changes of C and S isotopes and corresponding environmental changes during the Hirnantian glaciation in semi-restricted basins.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Marcus Paulo Sotero, Fabricio de Andrade Caxito, Carlos Jose Souza de Alvarenga, Roberto Ventura Santos, Marco Aurelio Piacentini Pinheiro, Paulo Henrique Amorim Dias
Summary: The rocks of the Vazante Group in the Morro Agudo region of southeastern Brazil are composed of a thick clay-carbonate sequence and were deposited in a mixed marine passive margin environment. Isotope analyses revealed different chemical markers in the two upper stratigraphic units, indicating a significant change in depositional environment.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
James S. Eldrett, Manuel Vieira
Summary: This study generated a stable carbon isotope profile of the Early Cretaceous to Paleogene from well 30/2a-7 in the Central North Sea, providing an integrated stratigraphic framework incorporating calcareous nannofossil biostratigraphy and sequence stratigraphy. By correlating with similar records from other realms, it offers a chronostratigraphic framework for hydrocarbon play elements and carbon capture projects.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Zhongya Hu, Zhiqiang Shi, Gaojun Li, Zhiguang Xia, Liang Yi, Chuan Liu, Weiqiang Li
Summary: This study investigates the Mg isotopic composition and trace elemental compositions of Cenozoic dolostones from the Xisha Islands. The results indicate the stability of Mg isotopes in seawater since the late Cenozoic, while the increase in seawater Mg/Ca ratios cannot be explained by a single mechanism. It suggests that different processes involving Mg fluxes need to be coupled to explain the observed trends in Mg content and isotopic compositions.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Keiran A. Swart, Sergey Oleynik, Alfredo Martinez-Garcia, Gerald H. Haug, Daniel M. Sigman
Summary: By using foraminifera-bound organic matter (FBOM) delta C-13 as a potential proxy for dissolved CO2 concentration, researchers have achieved higher precision testing with new protocols and instruments. They found an inverse correlation between FBOM-delta C-13 and surface water [CO2(aq)], indicating the potential for FBOM-delta C-13 to serve as a paleoceanographic proxy for atmospheric pCO2.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geology
Thiago P. Santos, Luana P. Lisboa, Victor Carreira, Fellippe R. A. Bione, Igor M. Venancio, Marcelo C. Bernardes, Andre L. Belem, Rut A. Diaz, Manuel Moreira, Alexandre A. O. Lopes, Tulio L. Santos, Igor V. Souza, Andre L. D. Spigolon, Ana Luiza S. Albuquerque
Summary: In the past 66 million years, Earth has experienced dramatic climate changes, shifting from a warm greenhouse to a cold icehouse with polar ice caps. Geological records show that this transition caused significant long-term sea-level and atmospheric CO2 decline, influenced by orbital motions. However, the impact of these oscillations on the Brazilian margin is largely unknown.
Article
Geochemistry & Geophysics
T. Schwestermann, T. Eglinton, N. Haghipour, A. P. McNichol, K. Ikehara, M. Strasser
Summary: This study systematically characterizes the distribution of organic carbon in sediment cores from the southern and northern Japan Trench, revealing the origin of event deposits and the sources of organic matter in hadal trenches. The findings suggest that event deposits in the southern and central areas are mainly from remobilization of surficial sediment and deep erosion, while those in the northern area are influenced by canyon flushing events, indicating different mechanisms of organic carbon transfer in the Japan Trench.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Rene Jonk, Kevin M. Bohacs, J. Steve Davis
Summary: This study applies the sequence-stratigraphic method to assess the containment potential and risk of geological carbon sequestration. The findings suggest that clay-mineral aggregates provide the most consistent excellent seals, while more distal rock facies have lower containment capacity. The geometry and extent of favorable top seals are influenced by the basin type and sediment delivery.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Lukas Ackerman, Jiri Zak, Karel Zak, Jan Pasava, Vaclav Kachlik, John Hora, Frantisek Veselovsky, Jaroslava Hajna
Summary: The Ediacaran to early Cambrian limestones in the Blovice accretionary wedge demonstrate how paleooceanographic and palaeoenvironmental conditions at active plate margins can be recorded by isotopic composition. Different types of limestones provide insights into various depositional conditions and are linked with paleooceanic and paleogeographic interpretations. Additionally, carbonate-bearing silicate rocks with different elemental and isotopic compositions suggest their common origin at active margins and some of them may have formed through hydrothermal activity.
PRECAMBRIAN RESEARCH
(2022)
Article
Geology
Ross P. Anderson, Francis A. Macdonald, David S. Jones, Sean McMahon, Derek E. G. Briggs
Article
Geology
David S. Jones, Anna M. Martini, David A. Fike, Kunio Kaiho
Article
Oceanography
Brian Yellen, Jonathan D. Woodruff, David K. Ralston, D. G. MacDonald, D. S. Jones
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2017)
Article
Geochemistry & Geophysics
Kristin D. Bergmann, Seth Finnegan, Roger Creel, John M. Eiler, Nigel C. Hughes, Leonid E. Popov, Woodward W. Fischer
GEOCHIMICA ET COSMOCHIMICA ACTA
(2018)
Article
Evolutionary Biology
Ross P. Anderson, Sean McMahon, Francis A. Macdonald, David S. Jones, Derek E. G. Briggs
JOURNAL OF SYSTEMATIC PALAEONTOLOGY
(2019)
Article
Geology
Sara B. Pruss, David S. Jones, David A. Rke, Nicholas J. Tosca, Paul B. Wignall
Article
Geochemistry & Geophysics
L. E. Faggetter, P. B. Wignall, S. B. Pruss, D. S. Jones, S. Grasby, M. Widdowson, R. J. Newton
Review
Geochemistry & Geophysics
William Menke, Roger Creel
Summary: This paper analyzes Gaussian process regression (GPR) in the context of Inverse Theory, deriving expressions for various standard Inverse Theory quantities and studying impulse response in the one-dimensional continuum limit. The importance vector is demonstrated to be useful for designing an optimum GPR experiment through importance winnowing.
SURVEYS IN GEOPHYSICS
(2021)
Article
Multidisciplinary Sciences
Blake Dyer, Jacqueline Austermann, William J. D'Andrea, Roger C. Creel, Michael R. Sandstrom, Miranda Cashman, Alessio Rovere, Maureen E. Raymo
Summary: Research suggests that global mean sea level (GMSL) during the last interglacial (LIG) period may have been higher than at present, with a 95% probability of peaking at least 1.2 meters higher than today and a very low likelihood (5% probability) of exceeding 5.3 meters. Uncertainties in the glacial isostatic adjustment (GIA) process and input models reduce precision and accuracy in estimating past GMSL, but findings indicate the potential for lower GMSL during the LIG period than previously assumed.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geochemistry & Geophysics
William Menke, Roger Creel
Summary: This article discusses the features and limitations of differential data, and their applications in seismology and other areas of geophysics. It highlights the assumption that differential data are uncorrelated and have uniform variance, which is well justified when the original data covary according to a two-sided exponential function. However, it is not justified when the original data covary according to a Gaussian function. The article also explores the implications of irregularly spaced data on the correlation and variance of differential data.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2022)
Article
Geochemistry & Geophysics
Kunio Kaiho, Daisuke Tanaka, Sylvain Richoz, David S. Jones, Ryosuke Saito, Daichi Kameyama, Masayuki Ikeda, Satoshi Takahashi, Md. Aftabuzzaman, Megumu Fujibayashi
Summary: The study suggests that the Central Atlantic Magmatic Province may have triggered global environmental changes and the end-Triassic mass extinction through massive gas emissions, with low-temperature heating potentially leading to SO2-dominated gas emission and global cooling that precipitated the mass extinction.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geography, Physical
Roger C. Creel, Jacqueline Austermann, Nicole S. Khan, William J. D'Andrea, Nicholas Balascio, Blake Dyer, Erica Ashe, William Menke
Summary: This study presents the first comprehensive postglacial relative sea-level database for the Norwegian coast from Oslo to the Kola Peninsula. The research assesses the spatiotemporal patterns of Norwegian RSL change through quality controlled and recalibrated data, as well as statistical modeling.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
J. Austermann, A. D. Wickert, T. Pico, J. Kingslake, K. L. Callaghan, R. C. Creel
Summary: Ice-marginal depressions formed by ice sheets loading Earth's surface can give rise to proglacial lakes when filled with meltwater. The presence of these lakes and their timing of disappearance is consistent with the geological record. Proglacial lakes can affect topography and can have global mean sea-level equivalent volumes approaching 30-45 cm. The depth of these lakes can impact ice-sheet mass loss and may contribute to glacial collapse.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Eliel S. C. Anttila, Francis A. Macdonald, Dawid Szymanowski, Blair Schoene, Andrew Kylander-Clark, Clara Danhof, David S. Jones
Summary: Understanding carbon transfer between Earth's surface reservoirs is crucial for interpreting climate transitions and predicting future climate change. This study examines volcanic ash beds in the Monterey Formation along the Santa Barbara coast to understand the timing and tempo of organic carbon accumulation. The findings demonstrate that organic carbon accumulation peaks do not align with the globally-observed Monterey Event, suggesting that organic carbon burial in the Monterey Formation is a response to, rather than a driver of, global climate.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geography, Physical
Huyue Song, Shixue Hu, Michael Benton, Dayong Jiang
Summary: This article examines the end Permian to Middle Triassic interval, which witnessed a significant marine mass extinction and delayed recovery. The focus is on Triassic marine sediments in South China, providing unique documentation of the collapse and recovery of marine ecosystems. Several papers analyze different fossils and their ecological significance, while others study biostratigraphy, reconstruct paleoenvironments, and link records to volcanic eruptions.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Mohammad Firoze Quamar, Upasana Swaroop Banerji, Biswajeet Thakur, Ratan Kar
Summary: The Indian Summer Monsoon is a crucial component of the Asian Monsoon System, impacting rainfall, agricultural productivity, and socio-economic growth in India and nearby regions. The central monsoon zone in India is more responsive to strong monsoon phases than weak ones.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Maria Laura Balestrieri, Valerio Olivetti, David Chew, Luca Zurli, Massimiliano Zattin, Foteini Drakou, Gianluca Cornamusini, Matteo Perotti
Summary: This study presents a multidisciplinary provenance study on legacy cores drilled in the central Ross Sea, Antarctica, providing insights into the oscillation of ice flows and advance and retreat phases of the West Antarctic Ice Sheet.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
P. Depuydt, S. Toucanne, C. Barras, S. Le Houedec, M. Mojtahid
Summary: This study provides a comprehensive overview of the dynamics of the upper branch of the Atlantic Meridional Overturning Circulation (AMOC) in the mid-latitudes of the Northeast Atlantic. It focuses on the European Slope Current (ESC) and its glacial equivalent known as the Glacial Eastern Boundary Current (GEBC). The study reveals significant changes in flow strength and ventilation during the glacial and deglaciation periods, as well as a gradual weakening of the slope current during the Holocene.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Junhee Park, Holly J. Stein, Judith L. Hannah, Svetoslav V. Georgiev, Oyvind Hammer, Snorre Olaussen
Summary: This study reports new Re-Os ages for black shales from Svalbard and evaluates the paleoenvironment during organic-rich shale deposition. The study also proposes correlations of specific Late Jurassic ammonite zones between the Boreal and Tethyan realms.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Guocheng Dong, Weijian Zhou, Feng Xian, Yunchong Fu, Li Zhang, Ling Tang, Pengkai Ding
Summary: The cause of ice-age cycles is still not fully understood, and studying the timing and magnitude of mountain glaciations can provide valuable insights. This study presents new dating results from the Niqingqu Valley in the Tibetan Plateau, showing multiple glacial activities prior to the Penultimate Glacial Maximum. The findings suggest that low atmospheric CO2 content and reduced summer solar insolation/high summer-monsoon precipitation played a role in these glacial fluctuations.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Haoran Dong, Zhitong Chen, Yucheng Wang, Jie Chen, Zhiping Zhang, Zhongwei Shen, Xinwei Yan, Jianbao Liu
Summary: Through sediment records from Lake Nanyi in the lower Yangtze, we found that anthropogenic fire activity played a dominant role in the region, and the temporal pattern of fire activity was asynchronous from east to west. Archaeological evidence suggests an inverse relationship between agricultural and population levels and fire intensity during the mid-Holocene, with fire intensity being influenced by the diversity of landscape types associated with pre-historic subsistence patterns. Overall, changes in regional water-level delayed the transition from hunting-gathering to agriculture in the lower Yangtze region.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Giovanni Coletti, Giulia Bosio, Alberto Collareta, Or Mordecai Bialik, Eleonora Regattieri, Irene Cornacchia, Gianni Insacco, John Buckeridge
Summary: This paper argues that sessile barnacles are an excellent proxy for palaeoenvironmental reconstructions. The shells of barnacles consist of diagenetically stable low-magnesium calcite and record short-term variations. Analyses of several Western Mediterranean barnacle-rich deposits demonstrate the utility of barnacles as proxies for water depth, distance from the coastline, and hydrodynamic conditions. Moreover, the stable isotope ratios of barnacle shells can provide detailed palaeoenvironmental information.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Feng Wu, Xinong Xie, Wen Yan, Youhua Zhu, Beichen Chen, Jianuo Chen, Mo Zhou
Summary: This paper describes the Quaternary evolution of Meiji Atoll in the southern South China Sea. The findings show how variations in sea surface temperature, eustatic sea level, and tectonics have influenced the development of the atoll. These findings have broader implications for understanding the Quaternary evolution of similar tropical carbonate atolls in the region.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Ana Mateos, Ericson Hoelzchen, Jesus Rodriguez
Summary: The Epivillafranchian and the transition to the Galerian was a period of environmental fluctuations and faunal turnover. Hominins and giant hyenas could coexist during the Epivillafranchian, but the transition to the Galerian led to a disruption of the scavenging niche, coinciding with the extinction of P. brevirostris.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Tianyu Du, Wensheng Zhang, Bing Li, Linjing Liu, Yuecong Li, Yawen Ge, Shiyong Yu
Summary: This article presents sedimentary evidence for a dramatic channel displacement of the lower Yellow River about 3000-2600 years ago, and explains the impact of this displacement on the geomorphology and human migration.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Johann Mueller, Michael M. Joachimski, Oliver Lehnert, Peep Mannik, Yadong Sun
Summary: The Late Ordovician mass extinction occurred during an ice age, with maximum ice coverage and a substantial drop in global sea level. This led to the exposure or shallowing of shallow tropical shelf environments. The study suggests that the burial rate of nutrient phosphorus (P) on shelves was minimal during this glacial period, leading to excess bioavailable P entering the open ocean and stimulating phytoplankton production, which in turn lowered oxygen concentrations.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Marina Addante, Patrizia Maiorano, Giovanna Scopelliti, Angela Girone, Maria Marino, Samanta Trotta, Antonio Caruso
Summary: This study presents the first high-resolution results on planktonic foraminiferal stable oxygen isotopes and calcareous plankton assemblages, providing insights into the glacial-interglacial variability and North Atlantic climate variability. The research also reveals evidence of the first significant southward migration of the Subarctic Front in the mid-latitudes.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Bing-Cai Liu, Rui-Wen Zong, Kai Wang, Jiao Bai, Yi Wang, Hong-He Xu
Summary: Phytogeography plays a vital role in the evolution of plants. This paper describes a new species of a spore-bearing plant from the upper Silurian period in West Junggar, China. By analyzing global Silurian macrofossil records, the study reveals the spatial-temporal distribution of Silurian plant macrofossils and identifies two phytogeographic realms during the Pridoli Epoch.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Francois Fournier, Thomas Teillet, Alexis Licht, Jean Borgomano, Lucien Montaggioni
Summary: This study investigates the temporal evolution of neritic carbonates in the proto-South China Sea to reconstruct East Asian monsoonal currents and winds during the middle to late Paleogene. The results highlight that many of the features of the summer East Asian Monsoon large-scale circulation are rooted in the middle Paleogene.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)