Editorial Material
Geochemistry & Geophysics
Michael D. Lewan
Summary: Peters et al. (2018) present new hydrous pyrolysis data that characterize the coal-reflectance and suppressed-reflectance trends during thermal maturation of source rocks. The experimental results show that the reflectance of coal is reduced when mixed with isolated liptinite encased in G-class Portland cement. However, they do not include earlier experimental data that contradict this finding, which suggest that the reflectance of coal does not decrease when mixed with liptinite in source rocks.
ORGANIC GEOCHEMISTRY
(2023)
Article
Geochemistry & Geophysics
Margaret M. Sanders, Aaron M. Jubb, Paul C. Hackley, Kenneth E. Peters
Summary: The commonly used thermal maturity calibration parameter, mean random vitrinite reflectance (R-o), is found to be suppressed in samples containing a high proportion of liptinite macerals. Raman and micro-Fourier transform infrared (mu-FTIR) analyses reveal different suppression mechanisms for vitrinite and solid bitumen. These findings suggest that the use of solid bitumen R-o for maturity calibration in liptinite-rich samples may result in misleading indicators.
ORGANIC GEOCHEMISTRY
(2022)
Article
Geosciences, Multidisciplinary
Ioannis Alexandridis, Ioannis K. Oikonomopoulos, Humberto Carvajal-Ortiz, Thomas Gentzis, Stavros Kalaitzidis, Andreas N. Georgakopoulos, Kimon Christanis
Summary: The Ionian Zone in western Greece is a sedimentary basin with petroleum potential and is linked to nearby Albania. This study describes a newly discovered source rock interval, the Pantokrator Shales, which is an important source rock for the petroleum system in the Ionian Zone. The composition and characteristics of the Pantokrator Shales are similar to intervals in nearby regions.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Qiuya Han, Meijun Li, Xiaoqiang Liu, Hong Xiao, Junhao Ren, Chengbo Guo
Summary: This study emphasizes the importance of correlating molecular dynamics (MD) simulations of thermal degradation of organic matter with natural processes in ancient sediments to understand hydrocarbon generation mechanisms at molecular and atomic levels. A practical maturation scale for molecular modeling of kerogen's thermal degradation is established. ReaxFF reactive MD simulations of kerogen's thermal evolution show that as simulation temperatures increase, the H/C and O/C atomic ratios of kerogen molecules decrease, and the paths of the three kerogen types fit well with those in the van Krevelen diagram. The results provide valuable insights for understanding the behavior of ancient sedimentary organic matter using MD simulation.
ORGANIC GEOCHEMISTRY
(2023)
Article
Geosciences, Multidisciplinary
Cortland F. Eble, Paul C. Hackley, Thomas M. (Marty) Parris, Stephen F. Greb
Summary: This study analyzed organic-rich shale samples from the Berea Sandstone to determine the origin of oil and gas. The results showed a correlation between thermal maturity parameters and black shale thickness and burial depth, indicating a northwest-southeast increase in thermal maturity. Geochemical and biomarker data suggest oil migration from thermally mature to less mature areas within the study region. Conventional thermal maturity proxies are not sufficient to predict the occurrence of petroleum liquids in the Berea Sandstone due to the influence of migrated petroleum.
Article
Geochemistry & Geophysics
Shu Jiang, Chen Zhang, Keji Yang, Maoyun Wang, Haowei Yuan
Summary: The study characterized geothermal resources in different types of sedimentary basins of China and discussed the major factors influencing these resources in various regions. The geothermal resource potentials in China's different sedimentary basins vary due to factors such as topography, geological history, and thermal events.
Article
Multidisciplinary Sciences
B. Moris-Muttoni, H. Raimbourg, R. Augier, R. Champallier, E. Le Trong
Summary: Whether seismic rupture generates mega-earthquakes or is rapidly aborted depends on the slip processes within the fault core, such as frictional melting or intense grain-size reduction and amorphization. The study on Black Fault Rocks suggests that Raman Spectroscopy of Carbonaceous Material reflects the intense strain during fault slip rather than frictional melting.
SCIENTIFIC REPORTS
(2022)
Article
Energy & Fuels
Xinran Liu, Hong Lu, Kang Li, Zhongfeng Zhao, Ping'an Peng, Chang Samuel Hsu
Summary: In conventional pyrolysis experiments, the removal of carbonates and silicates by acids can interfere with the measurement and affect the results. To explore hydrocarbon generation and expulsion under more realistic conditions, miniature core cylinders containing intrinsic minerals and fabrics were used in high-pressure pyrolysis experiments. The findings reveal the significant effects of minerals and residual bitumen on hydrocarbon generation, and the existence of five stages in hydrocarbon generation similar to kerogen pyrolysis. The oil expulsion efficiency ranges from 38% to 68% in the stages of early oil cracking and late oil cracking/wet gas formation.
Article
Energy & Fuels
Harald Karg, Bastian Sauerer
Summary: A set of core samples were analyzed using standard organic geochemical methods and a novel Raman spectroscopic technique. The results revealed that the kerogen in these samples is amorphous marine, sulfur-rich, and oil-prone, with algal precursor material. Raman spectral features were found to correlate with geochemical maturity parameters and basin modeling results. The combined use of different maturity parameters improves the calibration of regional basin models.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Yoav O. Rosenberg, Itay J. Reznik, Harold J. Vinegar, Shimon Feinstein, Yuval Bartov
Summary: This study explores the natural thermal maturation of sulfur-rich Type II-S source rocks, comparing geochemical data from the Golan Basin with an artificial maturation experiment in the Shfela Basin. The research suggests that sulfur content may affect hydrocarbon generation and contribute to differences in maturation paths between different kerogens.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Chioma Onwumelu, Stephan H. Nordeng, Francis C. Nwachukwu, Adedoyin Adeyilola
Summary: The Bakken Petroleum System consists of source rocks with high hydrocarbon generation potential, depending on kinetic properties, thermal maturity, and geochemical characteristics. Experimental and numerical analyses established correlations between kinetic parameters, thermal maturity indices, and reflectance values, enhancing reservoir exploration accuracy within the Bakken Formation. The study also identified a residual compensation effect and validated the importance of understanding source rock richness and burial-depth temperatures for hydrocarbon production.
Article
Energy & Fuels
Kyung Jae Lee
Summary: This study predicts the production potential of lithium from petroleum source rock brines and evaluates the factors influencing it through basin-scale numerical simulation and local sensitivity analysis. The results provide important information for quantitatively predicting lithium production potential and contribute to enhancing and diversifying lithium supply globally.
Article
Geochemistry & Geophysics
Paula Alexandra Goncalves, Joao Graciano Mendonca Filho, Deolinda Flores
Summary: Organic petrology was used in this study to analyze cutting samples from the Middle-Upper Jurassic in the Ramalhal-1 well. The results indicated a low DOM content with predominance of inertinite macerals and solid bitumen, showing a range of thermal maturities from immature to mature stages. The samples also exhibited heterogeneous bitumen populations with varying thermal maturities, suggesting no in situ generation.
Article
Optics
Linxuan Li, Siqi Zhu, Lu Cheng, Hongsheng Qi, Yu Fan, Wei Zheng
Summary: Raman and infrared reflectance spectroscopy were used to study GaN single crystals with different doping types and carrier concentrations. The characteristic spectra related to the carrier concentration were observed and fitted to obtain the accurate carrier concentration of the GaN crystals, which agreed well with the results from Hall measurement.
JOURNAL OF LUMINESCENCE
(2022)
Article
Geosciences, Multidisciplinary
M. Faiz, N. Sherwood, R. W. T. Wilkins
Summary: Using EPMA to analyze dispersed vitrinites in marine Jurassic rocks, it was found that the hydrogen content of the vitrinites is anomalously high and they may have more petroleum generation potential than previously thought. The FAMM analysis confirmed the suppression of vitrinite reflectance in Jurassic rocks, highlighting implications for petroleum exploration using vitrinite reflectance data.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Energy & Fuels
Jaques S. Schmidt, Carla V. Araujo, Igor V. A. F. Souza, Renata B. A. Chagas
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2015)
Article
Geochemistry & Geophysics
Delano M. Ibanez, Andre L. S. Pestilho, Bruno B. Turra, Nivaldo Destro, Fernando P. Miranda, Claudio Riccomini, Talita Lammoglia, Daniel S. Dubois, Jaques S. Schmidt
Article
Geochemistry & Geophysics
J. S. Schmidt, M. L. M. V. Lelarge, R. V. Conceicao, N. M. Balzaretti
EARTH AND PLANETARY SCIENCE LETTERS
(2014)
Article
Energy & Fuels
J. S. Schmidt, T. R. Menezes, I. V. A. F. Souza, A. L. D. Spigolon, A. L. S. Pestilho, L. F. C. Coutinho
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2019)
Article
Geosciences, Multidisciplinary
Paul C. Hackley, Carla Araujo, Angeles G. Borrego, Antonis Bouzinos, Brian J. Cardott, Humberto Carvajal-Ortiz, Martha Rocio Lopez Cely, Vongani Chabalala, Peter J. Crosdale, Thomas D. Demchuk, Cortland F. Eble, Deolinda Flores, Agnieszka Furmann, Thomas Gentzis, Paula A. Goncalves, Carsten Guvad, Maria Hamor-Vido, Iwona Jelonek, Michelle N. Johnston, Tatiana Juliao-Lemus, Siavros Kalaitzidis, Wayne R. Knowles, Jolanta Kus, Zhongsheng Li, Gordon Macleod, Maria Mastalerz, Taissa R. Menezes, Seare Ocubalidet, Richard Orban, Walter Pickel, Paddy Ranasinghe, Joana Ribeiro, Olga Patricia Gomez Rojas, Ricardo Ruiz-Monroy, Jaques S. Schmidt, Abbas Seyedolali, Georgios Siavalas, Isabel Suarez-Ruiz, Carlos Vargas Vargas, Brett J. Valentine, Nicola Wagner, Bree Wrolson, Julian Esteban Jaramillo Zapata
MARINE AND PETROLEUM GEOLOGY
(2020)
Article
Geochemistry & Geophysics
Jaques S. Schmidt, Ruth Hinrichs
METEORITICS & PLANETARY SCIENCE
(2020)