Article
Chemistry, Multidisciplinary
Maricarmen Igarza, Mohammed Boussafir, Michelle Graco, Abdelfettah Sifeddine, Jorge Valdes, Dimitri Gutierrez
Summary: The study analyzed surface sediment samples along the Peruvian continental margin and found that organic matter in recent sediments is mainly of marine origin and predominantly amorphous in nature. Accumulation and preservation of organic matter vary spatially due to different oceanographic conditions and productivity centers, impacting the depositional environments.
Article
Energy & Fuels
Ali Ihsan Karayigit, Riza Gorkem Oskay, Yakup celik
Summary: The late Oligocene coal seams in the Malkara coal field are influenced by vegetation and detrital input ratio, exhibiting high TOC and high hydrogen content, mainly generating natural gas. The Rock-Eval pyrolysis data should be used cautiously and verified with traditional coal parameters to avoid misinterpretations.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Energy & Fuels
Peng-Yan Du, Jin-Gong Cai, Qing Liu, Xue-Jun Zhang, Juan Wang
Summary: This study investigates the impact of different occurrences of organic matter (OM) on hydrocarbon generation in mudstones. The results indicate that mineral-bound organic matter (MOM) is the most abundant form of OM and serves as the main hydrocarbon precursor in shallow formations. Soluble organic matter (SOM) contributes to hydrocarbon generation mainly at deep depths, while particulate organic matter (POM) shows consistent hydrocarbon contributions regardless of depth.
Article
Energy & Fuels
A. Arysanto, R. Littke, M. Dorner, M. Erdmann, S. Grohmann
Summary: This study proposes a new approach to investigate hydrocarbon generation and migration processes in petroleum source rocks under laboratory conditions. The researchers used programmed open-system pyrolysis on small source rock plugs to induce changes in the type and distribution of solid bitumen. Organic petrography was used to qualitatively investigate the changes before and after the pyrolysis experiments. The results showed that thermal extraction and chemical extraction can alter the distribution of solid bitumen in the source rock plugs.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Amalia Yunita Halim, Sarah Jane Kelloway, Christopher Marjo, Klaus Regenauer-Lieb
Summary: Recent advancements in core scanning technologies have enabled fast and non-destructive chemical and mineral profiling of rock samples, benefiting mineral services and oil and gas exploration. The integration of automatic core scan methods and elemental analysis provides valuable information and addresses challenges in interpreting complex mineral samples.
APPLIED GEOCHEMISTRY
(2021)
Article
Geochemistry & Geophysics
Esmat Abou El-Anwar, Salman Salman, Doaa Mousa, Sami Aita, Walid Makled, Thomas Gentzis
Summary: The study evaluated the properties of organic-rich black shale in the El Sebaiya area in Egypt, finding it to be composed of quartz, calcite, kaolinite, and montmorillonite. The shale was deposited under marine conditions and has a range of organic richness and hydrocarbon potential. Organic petrography suggests that the kerogen is mixed types II/III and III and is immature to marginally mature, with the potential for oil and gas generation at higher maturity levels.
Article
Geochemistry & Geophysics
Hadar Cohen-Sadon, Alon Amrani, Shimon Feinstein, Yoav Oved Rosenberg
Summary: This study proposes a new method for quantifying organic and pyritic sulfur in sedimentary rocks. The method involves gradual heating of the rock and monitoring of sulfur products. The results show a linear correlation between two new parameters, providing accurate separation of sulfur fractions. The method achieves an average precision of 6% and accuracy within 10% compared to conventional techniques.
ORGANIC GEOCHEMISTRY
(2022)
Article
Energy & Fuels
Emad A. Abd El Aziz, Mohamed M. Gomaa
Summary: This study is based on the investigation of core rock samples from the CSS-38 well in the northwest of Gulf of Suez, Egypt. It focuses on the lithology, microfacies, and electrical properties of the South Gharib Formation. The results show that the South Gharib Formation is not a good reservoir and consists mainly of sulphate-rich beds with some carbonate layers. The electrical properties are found to be related to the rock composition and mineralogy.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Article
Ecology
Julia Gensel, Marc Steven Humphries, Matthias Zabel, David Sebag, Annette Hahn, Enno Schefuss
Summary: The study reveals that sedimentary organic matter from inland areas is mainly deposited in the floodplain and swamp area of the wetland system, rather than the downstream lake area. Surface sediments in the downstream Lake St Lucia show distinct characteristics of less degraded organic matter, indicating different hydrological growth conditions for the contributing vegetation. This finding has important implications for future environmental studies.
Article
Geochemistry & Geophysics
Hadar Cohen-Sadon, Yoav Oved Rosenberg, Alon Amrani
Summary: Sulfur isotopic values play a crucial role in studying the global sulfur cycle and petroleum geochemistry. The traditional measurement methods are time-consuming and tedious, but using the Rock-Eval 7S analyzer and RE/MC-ICPMS system allows for rapid and accurate determination of sulfur isotopic values.
Article
Geochemistry & Geophysics
Galina Vinnichenko, Amber J. M. Jarrett, Lennart M. van Maldegem, Jochen J. Brocks
Summary: Carbon (delta C-13) and hydrogen (delta H-2) compound-specific isotope analyses on sedimentary hydrocarbons are widely used in ecological reconstructions and oil-related studies. The effects of thermal alteration on isotopic composition are significant, with a strong positive correlation between n-alkane isotopes and thermal maturity. The study suggests that the isotope slopes of n-alkanes change with maturity, indicating shifts in generation and degradation mechanisms during maturation processes.
ORGANIC GEOCHEMISTRY
(2021)
Article
Geosciences, Multidisciplinary
Barry Jay Katz, Fang Lin
Summary: Many assessors of geochemical data tend to interpret the data in a cookbook approach without considering the limitations of different datasets. It's important to take into account analytical uncertainties and natural variability when interpreting thermal maturity indicators. Geological framework and trends should be considered rather than focusing on discrete values when studying thermal maturity indicators like vitrinite reflectance.
Article
Geochemistry & Geophysics
Guiwen Xu, Lan Chen, Weiguang Zhu, Xuejuan Da, Zhangxiong Zhu, Haisheng Yi
Summary: This study focuses on the organic geochemistry of Jurassic black shales in the Qiangtang Basin. The results show that these black shales have relatively high organic carbon content and low thermal maturity. The organic matter is primarily derived from phytoplankton and the depositional environment is characterized by unstratified marine waters.
Article
Multidisciplinary Sciences
Nikola Botoucharov, Alexander Zdravkov, Doris Gross, Irena Kostova, Achim Bechtel
Summary: Investigation of Sediments of Stefanets Mb. reveals low hydrocarbon generative potential, minor remaining gas-prone generation potential, and high level of thermal maturity.
COMPTES RENDUS DE L ACADEMIE BULGARE DES SCIENCES
(2022)
Article
Geology
Grzegorz J. Nowak, Anna Gorecka-Nowak, Przemyslaw Karcz
Summary: This study describes the organic characteristics and geochemical features of Anthracosia Shales, a lacustrine black shale formation in the Intrasudetic Basin. The results indicate that these shales have good petroleum potential.
GEOLOGICAL QUARTERLY
(2022)
Article
Geosciences, Multidisciplinary
Jean-Philippe Blouet, Patrice Imbert, Anneleen Foubert, Sutieng Ho, Gerard Dupont
Summary: This study examines the importance of seep carbonates in analyzing petroleum systems at a basin scale, focusing on the mapping of seep carbonate distribution in the Lower Cretaceous slope wedge of the southeastern France Basin. Through analysis of carbon isotope signatures and regional tectono-sedimentary context, it illustrates the potential application of seep carbonate mapping as a valuable tool for petroleum geologists.
Article
Geosciences, Multidisciplinary
Bruno Lauper, Geraldine N. Zimmerli, David Jaeggi, Gaudenz Deplazes, Stephan Wohlwend, Johannes Rempfer, Anneleen Foubert
Summary: The Opalinus Clay in Switzerland has been extensively studied for its potential as a host rock for deep geological disposal of radioactive waste. Through multi-proxy analysis, five distinct subfacies types have been identified within the clay lithology, with the aim of improving consistency in petrographic descriptions across research projects and demonstrating the relationship between lithology and various rock properties.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geology
Eva De Boever, David Jaramillo-Vogel, Anne-Sophie Bouvier, Norbert Frank, Andrea Schroder-Ritzrau, Lukas Baumgarter, Rudy Swennen, Anneleen Foubert
Summary: Spring systems are efficient in precipitating non-marine carbonate factories, but diagenesis is common. This study reexamines a core from Mammoth Hot Springs in Yellowstone National Park, comparing it with modern hot spring carbonates to understand the impacts of early diagenesis. The research shows that travertine deposition began at the beginning of the Holocene/end Pleistocene, with aragonite deposits transforming into calcite over a time span of 4,000 years. Additionally, travertine strata below marine sandstones in the core may relate to fault displacement after travertine deposition started.
DEPOSITIONAL RECORD
(2022)
Article
Marine & Freshwater Biology
Jacek Raddatz, Volker Liebetrau, Andres Rueggeberg, Anneleen Foubert, Sascha Floegel, Dirk Nuernberg, Karen Hissmann, Johannes Musiol, Tyler Jay Goepfert, Anton Eisenhauer, Wolf-Christian Dullo
Summary: Similar to tropical corals, cold-water corals (CWCs) can build large three-dimensional reef structures. Climate change poses a risk to these unique ecosystems. A recent study found detailed hydrographical changes in a CWC mound off southern Norway. The growth and formation of CWCs in this region are influenced by the interplay between the inflow of Atlantic water and the outflow of Baltic Sea water, with the presence of Baltic Sea water possibly endangering modern shallow Norwegian CWC reefs.
Correction
Marine & Freshwater Biology
Jacek Raddatz, Volker Liebetrau, Andres Ruggeberg, Anneleen Foubert, Sascha Flogel, Dirk Nurnberg, Karen Hissmann, Johannes Musiol, Tyler Jay Goepfert, Anton Eisenhauer, Wolf-Christian Dullo
Article
Geochemistry & Geophysics
Y. Zhou, M. Pugnetti, A. Foubert, P. Lanari, C. Neururer, A. R. Biedermann
Summary: This study integrates He pycnometry and XRCT-derived pore space models with magnetic pore fabric (MPF) method to quantitatively compare calcarenite and molasse sandstone. The study finds that MPF and total shape ellipsoids are generally coaxial, with MPF having a smaller anisotropy degree. The relationship between the two depends on the ferrofluid properties. Although there is large variability in anisotropy shapes, the good agreement of principal directions in most samples makes MPFs a valuable and efficient complementary tool for field-scale pore space characterization, in combination with XRCT on selected samples.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Editorial Material
Geology
Valentin Rime, Anneleen Foubert
Article
Geosciences, Multidisciplinary
Robin Fentimen, Eline J. Feenstra, Andres Ruggeberg, Efraim Hall, Antonietta Rosso, Irka Hajdas, David Jaramillo-Vogel, Bernard Grobety, Thierry Adatte, David Van Rooij, Norbert Frank, Anneleen Foubert
Summary: This study investigates the process of mound build-up in a cold-water coral mound system by comparing multiple core samples taken from different locations. The results show that the timing and rate of mound formation vary under cold conditions, possibly due to environmental factors.
Article
Geology
David Jaramillo-Vogel, Juan Carlos Braga, Haileyesus Alemu Negga, Torsten Vennemann, Eva De Boever, Jean -Charles Schaegis, Valentin Rime, Balemwal Atnafu, Tesfaye Kidane, Anneleen Foubert
Summary: Fibrous aragonite crusts in the Danakil Depression underwent destructive diagenesis, resulting in secondary textures that mimic micritic and grumous (peloidal and clotted) textures associated with sparry microfabrics. The process involved the dissolution of aragonite crystals and subsequent filling of porosity with calcite. Stable C- and O-isotope compositions indicate the influence of meteoric and evaporative fluids. These findings challenge the interpretation of certain textures as primary microbial precipitates in ancient microbialites, suggesting they may be diagenetic products instead, although microbial processes and/or organic matter degradation may have been involved in the diagenetic process.
SEDIMENTARY GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Robin Fentimen, Eline Feenstra, Andres Ruggeberg, Efraim Hall, Valentin Rime, Torsten Vennemann, Irka Hajdas, Antonietta Rosso, David Van Rooij, Thierry Adatte, Hendrik Vogel, Norbert Frank, Anneleen Foubert
Summary: This study provides a detailed reconstruction of cold-water coral mound build-up within the East Melilla Coral Province (southeastern Alboran Sea) over the last 300 kyr. The investigation reveals that mound build-up occurred during both interglacial and glacial periods, with average aggradation rates ranging between 1 and 10 cm kyr(-1). Coral growth during this time period was influenced by stressful environmental conditions.
CLIMATE OF THE PAST
(2022)
Article
Geology
Peter Homewood, Monique Mettraux, Michael Vanden Berg, Anneleen Foubert, Reiner Neumann, Dennis Newell, Genevieve Atwood
Summary: Non-marine carbonates at Lakeside, Utah, represent transitional shoreline paleoenvironments resulting from lake elevation changes. The presence of microbial influence in groundwater springs and littoral carbonates suggests unique microbial ecosystems with specific mineralogy. The deposition and early diagenesis processes at Lakeside were influenced by a complex interaction between microbial and chemical processes.
DEPOSITIONAL RECORD
(2022)
Article
Geology
Jeroen Soete, Steven Claes, Hannes Claes, Marcelle M. Erthal, Helen Hamaekers, Eva De Boever, Anneleen Foubert, Norbert Klitzsch, Rudy Swennen
Summary: The use of integrated methods such as petrography, mercury injection capillary pressure, laboratory nuclear magnetic resonance, and X-ray computed tomography is essential in understanding the plug scale porosity and permeability heterogeneities in continental spring carbonate reservoir analogues. The presence of different pore types influences the connectivity of pore networks and the reservoir properties in these carbonate formations.
DEPOSITIONAL RECORD
(2022)
Article
Geochemistry & Geophysics
Jean-Philippe Blouet, Patrice Imbert, Sutieng Ho, Andreas Wetzel, Anneleen Foubert
Summary: The vertical growth of seep carbonates is governed by bioturbation, with different tiers of burrows being filled by sediment and cements at different stages, indicating fluid communication and carbonate precipitation being influenced by the burrow network during the active development of the limestone pseudobioherm.
Article
Geology
Bruno Lauper, Gaudenz Deplazes, Hendrik Vogel, David Jaeggi, Stephan Wohlwend, Daniel Ariztegui, Anneleen Foubert
Summary: Opalinus Clay in Switzerland is selected as the host rock for deep geological disposal of radioactive waste, with a complex lithostratigraphic transition to its upper bounding unit. The study demonstrates the applicability of X-ray fluorescence chemostratigraphy in characterizing lithofacies and understanding the complex genesis of the lithostratigraphic transition. The research also reveals the use of specific elemental proxies to track the lithostratigraphic transition and its connection to sediment bypassing.
DEPOSITIONAL RECORD
(2021)
