Article
Environmental Sciences
Florian Scholz, Jun Cheng, Zhouling Zhang, Paul Vosteen, Christopher Siebert, Martin Frank
Summary: Barium (Ba) isotopes can serve as a tracer for riverine freshwater input to the ocean and marine biogeochemical cycling. This study investigates the processes affecting Ba cycling in Kiel Bight, a fjord in the Baltic Sea. The results show that Ba concentrations and isotope ratios vary with depth and are influenced by mixing of freshwater and seawater, as well as biological processes and sediment-water interactions. These findings have implications for understanding nutrient dynamics and the isotopic balance of Ba in the ocean.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geochemistry & Geophysics
A. Rudolph, B. Horgan, J. Johnson, K. Bennett, J. Haber, J. F. Bell, V Fox, S. Jacob, S. Maurice, E. Rampe, M. Rice, C. Seeger, R. Wiens
Summary: This article discusses the diagenesis and distribution of clay minerals in the Glen Torridon area of the Gale crater on Mars. The research indicates that there have been multiple episodes of diagenesis, with increasing abundance and diversity from the lower to upper sections. Morphological evidence for different diagenetic stages has also been observed, with the suggestion that the sandstone-dominated Stimson formation acted as a conduit for fluid flow during diagenesis.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2022)
Article
Geosciences, Multidisciplinary
Julie Ngwal'ghoubou Ikouanga, Claude Fontaine, Franck Bourdelle, Ahmed Abd Elmola, Jeremie Aubineau, Olabode M. Bankole, Laurie Reisberg, Anne-Catherine Pierson-Wickmann, Armelle Riboulleau, Alain Trentesaux, Claude Laforest, Alain Meunier, Abderrazak El Albani
Summary: The taphonomy of early soft-bodied organisms in Palaeoproterozoic sediments is still not well understood. The discovery of multicellular organism macrofossils in black shales in the Gabonese Francevillian Basin provides an exceptional example of fossil preservation. This study aims to provide a better understanding of soft-bodied organism preservation through mineralogical and textural analysis.
PRECAMBRIAN RESEARCH
(2023)
Article
Geography, Physical
Jimmy de Rooij, Jeroen H. J. L. van der Lubbe, Suzan Verdegaal, Megan Hulscher, Daphne Tooms, Pim Kaskes, Oeki Verhage, Leonie Portanger, Anne S. Schulp
Summary: Our understanding of Late Cretaceous dinosaur ecosystems has improved through stable isotope analyses. An analysis of a Triceratops bonebed provides insights into the paleoecology of these large herbivores and their habitat use, diet, and possible migration.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Andrea Schicker, Susanne Gier, Juergen Schieber, Peter Krois
Summary: Diagenetic processes and pore development in the main source rock for oil and gas in the Vienna Basin have been studied, revealing variations in mineral composition with depth, with illite-smectite mixed-layer phase gradually transforming into illite. This transformation led to the formation of various late diagenetic mineral cements and different types of pores, including organic matter pores and quartz cementation pores.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Gabriel C. Unomah, Manika Prasad, Michael A. Oladunjoye, Idowu A. Olayinka
Summary: This study investigates the geological properties of the Lokpanta Shale in the Anambra Basin and identifies its potential as an unconventional hydrocarbon resource. The study findings suggest that the shale contains organic matter and clay minerals, with wide pore distribution and high fluid storage, transport, and adsorption capacity.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Navot Morag, Ofra Klein-Ben David, Amir Sandler
Summary: A thick sequence of arkosic sandstones and conglomerates, along with volcanic rocks, were deposited in the northern Arabian-Nubian Shield during the late Neoproterozoic Ediacaran period. The study of these sediments in southern Israel provides insights into their depositional environments and diagenetic processes. The composition of trace elements and clay minerals in these sediments reveals their provenance and depositional history.
PRECAMBRIAN RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Jongmuk Won, Junghee Park, Junki Kim, Junbong Jang
Summary: The current classification of clayey soils lacks information on pore fluid chemistry and particle size, which are critical factors in determining the plasticity and shear strength of clayey soils. This study emphasizes the importance of incorporating pore fluid chemistry and particle size into the fines classification system, as they play a significant role in predicting the behavior of clayey soils.
Article
Geochemistry & Geophysics
James T. Haber, Briony Horgan, Abigail A. Fraeman, Jeffrey R. Johnson, Jim F. Bell, Melissa S. Rice, Christina Seeger, Nicolas Mangold, Lucy Thompson, Danika Wellington, Ed Cloutis, Samantha Jacob
Summary: The study uses Mastcam multispectral data to investigate the mineralogy of the Sutton Island member of the Murray formation in Gale crater, suggesting a complex history of deposition and diagenesis that may be crucial for understanding changing water-rock interactions within the crater.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2022)
Article
Engineering, Petroleum
Ekaterina S. Kazak, Andrey Kazak, Felix Bilek
Summary: This study aims to develop a new integrated solution for determining the formation water content and salinity using the evaporation method with isotopic analysis, analysis of aqueous extracts, and cation exchange capacity study. The research effort fills knowledge gaps in the petrophysical interpretation of well logs and reservoir characterization by analyzing tight reservoir rock samples, including shales and source rocks.
Article
Geochemistry & Geophysics
Julia A. McIntosh, Neil J. Tabor, Nicholas A. Rosenau
Summary: The study indicates that mixed-layer illite-smectite in Illinois Basin paleosols is likely a product of burial diagenetic processes rather than ancient soil formation processes. Acid leaching from coal units and hydrothermal brines may have impacted the illite-smectite in Pennsylvanian paleosols.
Article
Geology
Jiuyuan Wang, Andrew D. Jacobson, Bradley B. Sageman, Matthew T. Hurtgen
Summary: This study explores the origin of δCa-44/40 variability during OAE 1a by utilizing the stable strontium isotope system, revealing a strong correlation between δCa-44/40 and δSr-88/86 under kinetic control, rather than end-member mixing. Positive shifts in δCa-44/40 and δSr-88/86 before OAE 1a suggest reduced precipitation rates, indicating a cascade effect on rate-dependent Ca and Sr isotope fractionation induced by the interaction between LIP eruptions and biocalcification feedbacks.
Article
Geochemistry & Geophysics
Eva L. Scheller, Miquela Ingalls, John M. Eiler, John P. Grotzinger, Uri Ryb
Summary: Through heating experiments of MHC, the researchers found that the stable isotopic compositions of ikaite pseudomorphs can be used for paleoclimate reconstruction, providing information about water temperature, δ18O(CARB), δ18O(fluid), and δ13C(CARB) which are influenced by dehydration diagenetic effects.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Chemistry, Physical
L. Frederickx, M. Honty, M. De Craen, J. Elsen
Summary: This study investigates the representativeness of the fraction <2 mu m by isolating and quantifying the mineral composition of all size fractions of the Rupelian Boom Clay (Belgium). Additionally, the study of size fractions is used to quantify and correctly integrate muscovite into a whole rock mineral composition.
APPLIED CLAY SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Jingdong Liu, Lei Li, Cunjian Zhang, Youlu Jiang, Rudy Swennen, Chengjin Zhao, Shuai Hou
Summary: This study investigates the pore structure and fluid flow behavior in tight sandstone reservoirs of the Upper Triassic Xujiahe Formation in the northern Sichuan Basin. Different types of sandstones possess different pore-throat systems, with clay mineral-related pores and throats being the key factors affecting the pore structure and fluid flow behavior. The findings provide valuable insights for reservoir characterization and development.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Benoit Quesnel, Laurent Truche, Michel Cathelineau, Marie-Christine Boiron, Malgorzata Lempart-Drozd, Thomas Rigaudier, Arkadiusz Derkowski, Eric C. Gaucher
Summary: Phyllosilicates can trap or produce hydrogen in the crust through various processes, including dehydrogenation. Thermal treatment of chloritite and talc released H-2 and CO, with hydrogen content up to 7 ppm and a carbon isotope composition suggesting a link to graphite found in the deposit. This study highlights the potential source of H-2 from phyllosilicates and the importance of considering dehydrogenation in the geochemical cycle of hydrogen.
Article
Geochemistry & Geophysics
Jessica Strydom, Jerome Sterpenich, Dragan Grgic, Antonin Richard, Hans G. M. Eggenkamp, Pierre Agrinier, Pascale Louvat, Regine Mosser-Ruck, Patrick Gaire, Eric C. Gaucher
Summary: This study investigates the chemical and halogen isotope evolutions of pore water expelled during clay compaction. The results show significant differences in chemistry and isotope behavior between swelling clay and non-swelling clay. Higher temperature during compaction leads to more freshening of the expelled water. The study suggests that Cl and Br isotopes can be used as tracers to track the origin of low-salinity formation waters in sedimentary basins.
APPLIED GEOCHEMISTRY
(2022)
Article
Energy & Fuels
F. Bretaudeau, M. Darnet, J. Porte, C. Lerouge, S. Neeb, J. F. Girard, J. M. Baltassat, N. Coppo, Y. Lucas, C. Dezayes
Summary: This paper presents a study on the physical properties of a transition zone in the Ringelbach area, which provides insights into the assessment of geothermal potential. The results show that the altered porous and potentially permeable granite in deep geothermal exploration exhibits distinct electrical conductivity and seismic measurements, which can be detected at different scales and depths.
Article
Multidisciplinary Sciences
Wolfram Kloppmann, Lise Leroux, Philippe Bromblet, Pierre-Yves Le Pogam, Anne Therese Montech, Catherine Guerrot
Summary: Through isotope analysis of the materials used by the Master of Rimini and his workshop, it was found that they exclusively used alabaster from the Franconian region, which is different from previous research. Based on these findings, a new hypothesis is proposed, suggesting that the Master of Rimini may have originated from the Low Countries and established a highly productive workshop in Southern Germany.
Article
Multidisciplinary Sciences
Maria Naumenko-Dezes, Wolfram Kloppmann, Michaela Blessing, Raphael Bondu, Eric C. Gaucher, Bernhard Mayer
Summary: This article presents a study that reveals a previously overlooked source of natural gas in shale formations, which is generated by radiolysis of organic matter. The study shows that radiolytic gas can account for a significant portion of natural gas mixtures in major shale gas plays worldwide. Considering radiolytic gas as an additional component in uranium-bearing shale gas formations can lead to a more accurate determination of the origins of natural gas.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Green & Sustainable Science & Technology
Fanny Soetaert, Heike Wanke, Alain Dupuy, Vanessa Lusuekikio, Eric C. Gaucher, Vincent Bordmann, Jean-Marc Fleury, Michel Franceschi
Summary: This study evaluates the quality of springs in northwestern Namibia and proposes solutions for their sustainable use. Despite being in a region impacted by climate change, springs remain an important and sustainable water resource. However, most of the springs lack protective measures, highlighting the need for further conservation efforts.
Article
Environmental Sciences
G. Montavon, S. Ribet, Y. Hassan Loni, F. Maia, C. Bailly, K. David, C. Lerouge, B. Made, J. C. Robinet, B. Grambow
Summary: This study investigates the mobility of uranium in the Callovo-Oxfordian clay formation. Results show that the clay phase has strong adsorption for U(IV) but weak adsorption for U(VI). The clay phase is considered the largest reservoir of naturally-occurring U, but only a small fraction is adsorbed.
Article
Multidisciplinary Sciences
Anne-Marie Desaulty, Daniel Monfort Climent, Gaetan Lefebvre, Antonella Cristiano-Tassi, David Peralta, Sebastien Perret, Anthony Urban, Catherine Guerrot
Summary: Rechargeable lithium-ion batteries play a crucial role in the transition towards clean energy. However, ensuring the environmental and responsible sourcing of lithium is challenging. This study shows that using lithium isotope analysis can help determine the origin of lithium in batteries, providing a method for certifying the sourcing of lithium.
NATURE COMMUNICATIONS
(2022)
Article
Geochemistry & Geophysics
Sylvain Grangeon, Celine Roux, Catherine Lerouge, Patrick Chardon, Romain Beuzeval, Gilles Montavon, Francis Claret, Thomas Grangeon
Summary: The geochemical distribution of U and associated major and trace elements (As, Li, Pb, Sr, Zn) was studied at the former Rophin U mine (Puy-de-Dome, France). Three zones of contrasting radiological settings were identified and sampled, and it was concluded that U was mainly bounded to primary ore minerals in the streams and evenly distributed between different organic matter in the wetland soil.
APPLIED GEOCHEMISTRY
(2023)
Article
Geochemistry & Geophysics
Xavier Mangenot, Hao Xie, Antoine Cremiere, Thomas Giunta, Marvin Lilley, Olivier Sissmann, Victoria Orphan, Arndt Schimmelmann, Eric C. Gaucher, Jean-Pierre Girard, John Eiler
Summary: We present a method for measuring the clumped isotope composition of molecular hydrogen (H2) using a high-resolution mass spectrometer and optimized techniques for sample purification and concentration. The accuracy of the method is validated through comparisons with established methods and measurements of H2 gases at isotopic equilibrium. The study also investigates gas purification methods and demonstrates negligible changes in clumped isotope composition. Furthermore, the method is applied to natural geological samples, revealing the potential of clumped isotope composition in tracking temperatures and biogeochemical processes related to H2.
Article
Geology
D. Laurent, G. Barre, C. Durlet, P. Cartigny, C. Carpentier, G. Paris, P. Collon, J. Pironon, E. C. Gaucher
Summary: This study quantifies the relative influence of microbial and thermochemical processes on sulfuric-acid production in two caves in the French Pyrenees using an innovative approach combining geomorphology with measurements of multiple sulfur, oxygen, and strontium isotopes. The results reveal the origin of sulfate speleothems and provide insights into the percentages of biotic and abiotic sulfuric-acid speleogeneses that have occurred in the caves, highlighting the need for similar studies in other sulfuric-acid caves where microbial activity is typically considered.
Article
Engineering, Civil
Catherine Lerouge, Mathieu Debure, Ana-Maria Fernandez, Philippe Negrel, Benoit Made, Nicolas Maubec, Christine Flehoc, Catherine Guerrot, Michaela Blessing, Benoit Henry, Jean-Charles Robinet
Summary: The water transfers and processes in the groundwaters and clay pore waters in Te ' gulines Clay in Brienne-Le-chateau, France were studied. The investigation revealed temporary perched water table in the first ridgetop, lateral groundwater transfers and runoff towards the valley, and the composition differences between groundwaters and pore waters. The groundwater had low TDS concentration and calcic-carbonate composition, while the pore waters were chemically heterogeneous and showed Ca-Mg-SO4 enrichment.
JOURNAL OF HYDROLOGY
(2023)
Article
Energy & Fuels
F. Osselin, E. C. Gaucher, P. Baldoni-Andrey, W. Kloppmann, B. Mayer
Summary: To analyze the effect of a new gelling agent for hydraulic fracturing, fluid samples from different stages of the operation were collected from a well in Argentina. The samples were analyzed over a period of two years, showing an increase in salinity due to mixing with formation water and a decrease in concentration of trace elements and heavy metals, possibly due to delayed precipitation of barite. This finding suggests a potential option for mitigation and remediation of wastewaters from hydraulic fracturing.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Review
Environmental Sciences
Xiandong Liu, Christophe Tournassat, Sylvain Grangeon, Andrey G. Kalinichev, Yoshio Takahashi, Maria Marques Fernandes
Summary: This article discusses the molecular-level mechanisms of metal ion retention in clay minerals, including the main retention mechanisms, the importance in environmental and industrial applications, and methods to improve the understanding of clay mineral-metal interactions.
NATURE REVIEWS EARTH & ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Elodie Muller, Magali Ader, Giovanni Aloisi, Cedric Bougeault, Christophe Durlet, Emmanuelle Vennin, Karim Benzerara, Eric C. Gaucher, Aurelien Virgone, Marco Chavez, Pierre Souquet, Emmanuelle Gerard
Summary: This study investigates the formation of modern carbonate microbialites in the hydrothermal system of Laguna Pastos Grandes in Bolivia, and discovers multiple modes of carbonate precipitation under different physicochemical conditions.