Article
Geography, Physical
M'bark Baddouh, Alan R. Carroll, Elliot A. Jagniecki, Brian L. Beard, Tim K. Lowenstein, Clark M. Johnson
Summary: The isotopic trends of tufa in the Little Mesa area of the northern Bridger Basin reflect a mixing contribution from groundwater and lake water, resulting in different radiogenic ratios due to geological influences. This supports the hypothesis that climatic changes modulate expansions and contractions of Lake Gosiute water levels. Groundwater discharge may play a significant role in the covariance between Sr-87/Sr-86 ratios, delta C-13 and delta O-18 in closed paleolake systems.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Energy & Fuels
H. M. Nasrullah Faisal, Kalpana S. Katti, Dinesh R. Katti
Summary: The study focuses on the interactions between organic kerogen and inorganic mineral matrix in Green River oil shale, using molecular dynamics simulation technique for modeling. The research findings indicate that different fragments within the kerogen molecules interact with quartz mineral through electrostatic interactions.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Geology
Daniel F. Cupertino, Camila Wense Ramnani, Michael D. Vanden Berg, Stanley M. Awramik
Summary: This study investigates the magnesium-rich clay rocks in the Green River Formation and reveals their interaction with microbialites, carbonates, and volcanic deposits. The findings help to understand the genesis and distribution of these magnesium-rich clay minerals, as well as the depositional model of the ancient lake system.
Article
Geology
Elliot Andrew Jagniecki, Tim K. Lowenstein, Robert Demicco, M'bark Baddouh, Alan R. Carroll, Brian L. Beard, Clark M. Johnson
Summary: The study reveals that the carbonate mounds formed in the Green River Formation in Wyoming, USA were a result of significant spring discharge influenced by Palaeozoic carbonates. This finding highlights the importance of understanding paleohydrology in ancient lake systems.
Article
Energy & Fuels
Qiang Yan, Hongwei Ping, Xin Yang, Honglin Liu, Honghan Chen
Summary: This study aims to accurately identify the content of free oil and adsorbed oil, analyze the influencing factors of shale oil mobility, and evaluate shale oil mobility. By utilizing an integrated mineralogical and geochemical dataset, the results show that the abundance of organic matter and certain minerals can affect shale oil mobility.
Article
Geosciences, Multidisciplinary
Andrew P. Walters, Alan R. Carroll, Stephen R. Meyers, Tim K. Lowenstein
Summary: Lacustrine strata are valuable terrestrial paleoclimate archives with high resolution. This study uses X-ray fluorescence core scanning to analyze the long-term evolution of transfer functions in an ancient lacustrine record. The analysis reveals a shift in the frequency distribution of Milankovitch-band variance and a decline in evaporite beds, indicating the influence of evolving basin morphology on depositional transfer functions. These findings emphasize the importance of integrating basin and depositional system history with cyclostratigraphic interpretation of astronomical signals in stratigraphic records.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2023)
Article
Multidisciplinary Sciences
Valentin de Mazancourt, Torsten Wappler, Sonja Wedmann
Summary: A new species of extinct freshwater shrimp has been discovered in the Eocene deposit. This rare find includes several specimens, one of which has remarkably preserved soft tissues and other internal parts. By examining the characteristics of the shrimp, researchers can gain insights into its morphology and its role in the ancient ecosystem. Another specimen shows slightly different morphology and may belong to a different species.
SCIENTIFIC REPORTS
(2022)
Article
Geosciences, Multidisciplinary
Di Chen, Xiongqi Pang, Long Li, Fujie Jiang, Guoyong Liu, Min Li, Bo Pang, Hang Jiang, Zhi Xu, Wenyuan Han
Summary: The study evaluated the oil potential of MES shales in the Nanpu sag and found that the shale resources are abundant with low maturity, indicating potential for the development of significant hydrocarbon reserves through shale oil exploration.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Biology
Peter Barna, David Zelagin, Lucia Smidova
Summary: A new species, "Periplaneta smithiae sp. n.", has been discovered in the Eocene Green River Formation. It is suggested that this new species extends the Cenozoic distribution of the genus to the Americas. In addition, it is possible that the new species is closely related to other species from the Eocene Messel Lagerstatte. The characteristics of Periplaneta, such as the shape of the partially sclerotized forewing and its venation, as well as the leg carination, align with the taxonomical concept of the genus and provide further support for the cosmopolitan distribution of American cockroach assemblages during the Eocene.
Article
Energy & Fuels
Chao Liang, Jing Wu, Yingchang Cao, Keyu Liu, Danish Khan
Summary: The complexity and uniqueness of a lacustrine shale oil reservoir are caused by the complex mineral composition, multiple depositional processes, and strong reservoir heterogeneity. The study analyzed the storage space development model and modes of hydrocarbon occurrence in different lithofacies of the Es4s-Es3x shale in the Jiyang Sub-basin, East China. The hydrocarbon occurrence was mainly observed in free and adsorbed states in various storage spaces. The organic-rich calcareous shale was identified as a sweet spot for shale oil exploration due to its abundant storage space and high hydrocarbon potential.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Geochemistry & Geophysics
Hong Zhang, Haiping Huang, Mengsha Yin
Summary: In this study, nine samples from the Upper Cretaceous Second White Speckled Shale Formation were characterized for their oil contents, physical states, and chemical compositions. The results showed differences in the composition of free and adsorbed oils, and the lithological heterogeneities controlled the amount and composition of retained fluids. This research provides important insights into the distribution and characteristics of hydrocarbons in shale plays.
Article
Chemistry, Multidisciplinary
Yuyang Shao, Qiang Zhang, Yuanji Li, Zhisheng Luan, Baiqiang Tang
Summary: This study focused on the deposition characteristics of oil shale in the early Eocene Jijuntun Formation in Fushun Basin. Multiple methods were used to predict total organic carbon (TOC) content, and lake-level changes were reconstructed using logging and dynamic noise techniques. The results showed that the source of organic matter in the oil shale was basically the same, and the lake level experienced five stages of change. This study provides a theoretical basis for understanding the plane change of stable deep lake lakes and studying lake levels in faulted lake basins in Paleogene Northeast Asia.
Article
Multidisciplinary Sciences
Anupam K. Misra, Sonia J. Rowley, Jie Zhou, Tayro E. Acosta-Maeda, Luis Dasilveira, Gregory Ravizza, Kenta Ohtaki, Tina M. Weatherby, A. Zachary Trimble, Patrick Boll, John N. Porter, Christopher P. McKay
Summary: The search for life on other planetary bodies is a major goal for NASA, but finding evidence of biological residue is a significant challenge. Researchers have developed a highly sensitive instrument called the Compact Color Biofinder, which can detect small amounts of biological material from a distance. A study using this instrument demonstrates its efficacy in detecting fossils with strong bio-fluorescence signals. The results confirm the preservation of organic matter in the Green River formation and suggest that biofluorescence imaging will be critical in future NASA missions.
SCIENTIFIC REPORTS
(2022)
Article
Zoology
S. Bruce Archibald, Vladimir N. Makarkin
Summary: Four new species of Raphidiidae from early Eocene in western North America and two other species are redescribed. Some modern snakeflies do not require a cold interval for development, while Eocene snakeflies and Inocelliidae lived in regions of warm winters. The different characteristics between European and North American Eocene Raphidiidae may reflect dispersal or range establishment before continental separation. Eocene Inocelliidae of Europe are more similar to those of North America than Eocene Raphidiidae.
Article
Geology
Maxwell Pommer, Frederick Sarg, Forrest M. C. Farlin
Summary: Integrated stratigraphic, petrographic, and geochemical data reveal the influence of lake chemistry, microbial processes, and organic matter on dolomite formation throughout the deposition of the Green River Formation. The lower Formation consists of various lithologies and microbialites with common calcite, dolomite, Fe-dolomite, and authigenic feldspars. Covariant isotopic excursions occur in OM-bearing mudrocks. The upper Formation is mainly composed of laminated dolomitic muds with zoned dolomite crystals and enrichment in isotopic values. Precipitation of dolomite is favored by low-oxygen, alkaline saline environments with high planktic organic-matter productivity.
JOURNAL OF SEDIMENTARY RESEARCH
(2023)