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
Geology
Megan E. Smith, Peter K. Swart
Summary: The global correlation of negative excursions in delta C-13 values can be used to interpret major environmental changes, but diagenetic processes can affect these correlations.
SEDIMENTARY GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Huan Wang, Kaibo Shi, Yongsheng Ma, Bo Liu, Xinmin Song, Yuzhu Ge, Hangyu Liu, Rene Hoffmann, Adrian Immenhauser
Summary: The study on Mishrif carbonates in the Central Mesopotamian Basin of Iraq shows a wide range of rock fabrics and diagenetic features that impact reservoir quality and flow properties. A homoclinal ramp geometry model with twelve microfacies types is proposed, showing low-energy conditions in the ramp. Two main diagenetic features shape reservoir properties, including early diagenetic dissolution and preferential cementation, leading to distinctive reservoir qualities.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geology
Hamzeh Mehrabi, Emad Yahyaei, Amin Navidtalab, Hossain Rahimpour-Bonab, Ramin Abbasi, Mahboobeh Omidvar, Ali Assadi, Javad Honarmand
Summary: This study focuses on the sedimentological, geochemical, and petrophysical analysis of the Sarvak Formation in the Abadan Plain, Zagros Basin. Petrographic studies have identified five microfacies, representing different depositional environments. Two depositional sequences from the Cenomanian-Turonian period have been differentiated based on biostratigraphic analysis. The effects of meteoric diagenesis, such as dissolution, brecciation, and silicification, have been observed. The reservoir quality of the Sarvak Formation is influenced by facies characteristics and meteoric diagenetic processes, which can be predicted within a high-resolution sequence stratigraphic framework.
SEDIMENTARY GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Roger N. Bryant, Theodore M. Present, Anne-Sofie C. Ahm, Harry-Luke O. McClelland, Dan Razionale, Clara L. Blattler
Summary: This study examines the environmental factors driving early marine cementation in the Capitan Reef Complex in West Texas using stable isotope patterns. The results suggest that microbial sulfate reduction and recrystallization of carbonate phases were spatially and temporally coincident, leading to the incorporation of enriched sulfur isotopes in diagenetic calcite. The study also reveals that local diagenetic conditions influenced the extent of sulfur isotopic enrichment in carbonates compared to seawater. Additionally, the sulfate concentration in the Delaware Basin may have been lower during the Permian, resulting in more extensive isotopic evolution during carbonate recrystallization.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geochemistry & Geophysics
Jack G. Murphy, Anne-Sofie C. Ahm, Peter K. Swart, John A. Higgins
Summary: The records of lithium isotopic composition in seawater preserved in shallow-marine carbonate sediments are valuable for studying the links between silicate weathering, clay formation, global carbon cycle, and Earth's climate over geological time. This study presents measurements of lithium isotopic composition in Neogene shallow-marine carbonates and demonstrates the effects of mineralogy and diagenetic alteration on the variability of bulk sediment δ Li-7 values. The findings suggest that robust 'snapshots' of seawater δ Li-7 values in the past can be obtained from shallow-water marine carbonate sediments.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geosciences, Multidisciplinary
Jihad Hamd, Adrian Cerepi, Rudy Swennen, Corinne Loisy, Serge Galaup, Lea Pigot
Summary: This paper studies the sedimentary and diagenetic factors controlling the heterogeneity and petrophysical properties of carbonate reservoir systems. The research findings show that diagenetic processes such as dolomitization play a crucial role in the development of porosity and permeability in reservoir rocks.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geology
Cecilia B. Sanders, John C. Eiler, John P. Grotzinger
Summary: This study provides a paragenetic framework for phosphatic and non-phosphatic lithofacies of the Salitre Formation and reveals that the primary differences in porewater biogeochemistry may be the main mechanism controlling the distribution of phosphate and non-phosphate cements. Therefore, this study suggests that the ecology of the Ediacaran seafloor controlled the style and quality of mineralization observed today, and the presence of CFA cements in these rocks represents a unique taphonomic window for select microbial communities.
SEDIMENTARY GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Pengfei Di, Niu Li, Shanggui Gong, Joern Peckmann, Shuhong Wang, Duofu Chen, Wen Yan
Summary: This study investigates the resilience of carbonate-associated sulfate (CAS) isotopic signatures in reef carbonates, providing new insights for the reconstruction of ancient seawater sulfate sulfur and oxygen isotopes. The results indicate that reef carbonates can faithfully record changes in coeval seawater sulfur isotopes, regardless of diagenetic alteration, including dolomitization. However, the oxygen isotope composition of CAS is more susceptible to alteration during diagenesis.
Article
Geosciences, Multidisciplinary
Leilei Yang, Donghua Chen, Jing Hu, Xiujing Meng, Jianliang Liu, Wei Yang
Summary: Karst caves formed by meteoric water leaching play an important role in oil/gas storage in carbonate reservoirs. However, the mechanism by which meteoric water leaching transforms the carbonate sequence stratigraphy is still unclear. In this study, a solute transport numerical simulation model was developed and applied to simulate the effects of diagenetic transformation of meteoric water on sequence stratigraphy. The results provide insights into the factors influencing reservoir development under the carbonate sequence boundary.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Philip T. Staudigel, John A. Higgins, Peter K. Swart
Summary: This study utilized a numerical model and various isotope measurement techniques to investigate the changes in fluid advection rates over time, revealing a significant shift in the relative contributions of different mechanisms governing fluid flow around 13 million years ago.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geography, Physical
Lu Wu, Rui Wang, Kefu Yu, Min Ren, Simone Booker, Ruoxia Shen, Wei Jiang, Shendong Xu, Tianlai Fan, Songye Wu, Qiushuang Qin, Xingchi Li
Summary: This study investigates the relationship between the East Asian Summer Monsoon (EASM) and meteoric diagenesis in the Pleistocene carbonate succession on the Xisha Islands, South China Sea. The results show that meteoric diagenesis occurred during periods of low sea-level and was influenced by the relative intensity of the EASM. During strong EASM periods, meteoric diagenesis was intense, resulting in complete alteration of unstable minerals and extreme dissolution.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Julia Varella Malta, Joao Wagner Alencar Castro, Caique Lima Cabral, Daniel Fernandes, Hayley Candice Cawthra
Summary: Beachrocks along the Brazilian coastline, specifically in Rio de Janeiro, have diverse origins mainly composed of magnesian calcite cements; through C-14 dating, it was determined that these beachrocks lithified between 11,940-11,240 to 3130-2860 years ago, predominantly associated with shallow marine environments.
Article
Geochemistry & Geophysics
Tyler E. Huth, Benjamin H. Passey, Julia E. Cole, Matthew S. Lachniet, David McGee, Rhawn F. Denniston, Sarah Truebe, Naomi E. Levin
Summary: Speleothem oxygen isotope records are important for understanding late Quaternary terrestrial paleoclimate changes. This study developed a framework using triple oxygen isotope distributions in speleothems to refine interpretations of the records. By analyzing speleothem data, the study identified the influence of cave kinetic processes and hydrologic processes on oxygen isotope values.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Environmental Sciences
Jesper Allan Frederiksen, Robert Matthew Klaebe, Juraj Farkas, Peter Koenraad Swart, Robert Frei
Summary: The distribution of cadmium in oceans suggests its use as a nutrient by marine phytoplankton. This study focuses on tying the Cd isotopic record in modern carbonate to conditions in upper water column and suggests that δCd-114 values in carbonates are a reliable tool for reconstructing past bioproductivity levels. The burial and diagenetic processes of carbonate are postulated not to modify the Cd isotope signals, indicating the potential use of δCd-114 values in carbonates for reconstructing past ocean redox conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Geology
Arthur Adams, Larryn W. Diamond, Lukas Aschwanden
Article
Geosciences, Multidisciplinary
Lukas Aschwanden, Larryn W. Diamond, Arthur Adams
MARINE AND PETROLEUM GEOLOGY
(2019)
Article
Geosciences, Multidisciplinary
Arthur Adams, Larryn W. Diamond
SWISS JOURNAL OF GEOSCIENCES
(2019)
Article
Biodiversity Conservation
V Beccari, S. Spezzaferri, S. Stainbank, P. Hallock, D. Basso, A. Caragnano, C. Pisapia, A. Adams, A. Angeloz, N. Del Piero, P. Dietsche, I Eymard, N. Farley, M. Fau, A. Foubert, B. Lauper, A. Lehmann, M. Maillet, H. Negga, L. Ordonez, G. Peyrotty, V Rime, A. Rueggeberg, I Schoellhorn, L. Vimpere
ECOLOGICAL INDICATORS
(2020)
Article
Biodiversity Conservation
Stephanie Stainbank, Silvia Spezzaferri, Valentina Beccari, Pamela Hallock, Arthur Adams, Aurelie Angeloz, Daniela Basso, Annalisa Caragnano, Nicolo Del Piero, Patrick Dietsche, Ines Eymard, Nicholas Farley, Marine Fau, Anneleen Foubert, Bruno Lauper, Anael Lehmann, Marine Maillet, Haileyesus Negga, Luis Ordonez, Giovan Peyrotty, Valentin Rime, Andres Rueggeberg, Iris Schoellhorn, Lucas Vimpere
ECOLOGICAL INDICATORS
(2020)
Article
Multidisciplinary Sciences
Deyanira Cisneros-Lazaro, Arthur Adams, Jinming Guo, Sylvain Bernard, Lukas P. Baumgartner, Damien Daval, Alain Baronnet, Olivier Grauby, Torsten Vennemann, Jaroslaw Stolarski, Stephane Escrig, Anders Meibom
Summary: This study investigates fluid-mediated isotopic exchange in pristine foraminifera tests and finds that even tests considered texturally pristine for paleo-climatic reconstruction purposes may have experienced substantial isotopic exchange, highlighting the need for critical re-examination of paleo-temperature records.
NATURE COMMUNICATIONS
(2022)
Proceedings Paper
Geology
L. Aschwanden, L. W. Diamond, A. Adams, M. Mazurek
15TH WATER-ROCK INTERACTION INTERNATIONAL SYMPOSIUM, WRI-15
(2017)