Article
Geosciences, Multidisciplinary
Ahmed A. Radwan, Mohammad A. Abdelwahhab, Bassem S. Nabawy, Kamel H. Mahfouz, Mohamed S. Ahmed
Summary: The study conducted facies-constrained modeling to identify architectural elements of the Bahariya Formation, showing its potential reservoir quality. Through various data analysis, the formation was subdivided into different systems, with eight reservoir rock types identified for future oilfield development planning.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Mohamed Reda, Mohamed Fathy, Esam A. Gawad
Summary: A 3D reservoir modelling and basin analysis was conducted for the Siwa Basin in the North-Western Desert of Egypt, revealing the presence of a single petroleum system with the source rocks being the Palaeozoic Dhiffah, Desouky, and Zeitoun formations, and the main reservoir being the Safa Member (Khatatba Formation). Original Oil In Place for new prospects is 197.177 Stock Tank Barrel (STB).
GEOLOGICAL JOURNAL
(2022)
Article
Environmental Sciences
Muhammad Tayyab Naseer, Raja Hammad Khalid, Shazia Naseem, Wei Li, George Kontakiotis, Ahmed E. Radwan, Hammad Tariq Janjuhah, Assimina Antonarakou
Summary: Globally, deep-water reservoir systems are comprised of a variety of traps, including sand pinch-outs, truncation against salt or shale diapirs, and monoclinal dip or faulting. Deep-water turbidite and submarine fans are two different types of traps, with basin floor fans being the most prolific. Characterizing the thick channelized-basin floor fans reservoir is a challenge, but seismic-based attributes and wedge modeling can accurately resolve and characterize the reservoirs. Rating: 8 points.
Article
Energy & Fuels
M. F. Abu-Hashish, M. M. Abuelhassan, Gamal Elsayed
Summary: Recent advances in computer sciences have greatly improved the accuracy and detail of reservoir modeling, which is crucial for understanding and studying reservoir morphology and properties. This paper presents a case study of the Abu Roash G reservoir in the Hamra oil field, where a three-dimensional reservoir model was constructed to represent both vertical and lateral heterogeneity. Through interpretation of seismic data, fault picking, and well log data analysis, the lithology and physical properties of the reservoir were determined, highlighting the control of facies distribution and structural elements on rock properties.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Article
Energy & Fuels
Mostafa M. Metwally, Ahmed S. A. Abu El-Ata
Summary: The present work aims to investigate the reservoir characterizations of the Lower Cenomanian Baharyia Formation by creating isoparametic maps and utilizing well logging data. The Baharyia Formation is a significant hydrocarbon reservoir in the northern Western Desert of Egypt. Petrophysical modeling based on wireline logs from five wells in Razzak oil field was performed to determine the petrophysical parameters and implications for the formation. The results reveal that the Baharyia Formation has good reservoir quality with high effective porosity values, moderate shale content, and low water saturation values.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2023)
Article
Geosciences, Multidisciplinary
Blessing Ayotomiwa Afolayan, Eric Mackay, Mimonitu Opuwari
Summary: Carbon capture, utilization and storage (CCUS) is a crucial technology for greenhouse gas mitigation, and underground CO2 injection is a key aspect of carbon sequestration. This study focuses on a depleted oilfield reservoir in the Bredasdorp Basin, offshore South Africa, and examines its petrophysical properties and static storage capacity, demonstrating its suitability for CO2 storage.
NATURAL RESOURCES RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Taixun Liu, Nadir Fawad, Chao Li, Haitao Li, Ruiwu He, Jian Xu, Qazi Adnan Ahmad
Summary: The primary objective of oilfield development has shifted to focus on oilfield exploration and possible reservoir oil extraction. The distribution and characteristics of residual oil have become hot topics. This research study provides a physical simulation of the remaining oil distribution in the third-order architectural unit in a beach reservoir.
FRONTIERS IN EARTH SCIENCE
(2023)
Review
Geosciences, Multidisciplinary
Alexander L. Peace, Nikole Bingham-Koslowski, Tannis McCartney, J. Kim Welford
Summary: The Orphan Basin, a Mesozoic rift basin located offshore Eastern Canada, remains poorly understood compared to other rift basins in the North Atlantic region. This review aims to critically analyze and synthesize the available geoscientific information on the basin, identify knowledge gaps, and provide insights for future research directions.
EARTH-SCIENCE REVIEWS
(2022)
Article
Environmental Sciences
Nancy H. El Dally, Mahmoud S. Youssef, Mohamed H. Abdel H. Aal, Amir Ismail, Farouk I. Metwalli
Summary: A systematic evaluation of the petroleum system allows for a detailed assessment of the hydrocarbon prospects of a basin. The Shushan Basin is identified as the only region where Mesozoic source generation occurred. Geochemical methods and modeling were used to evaluate the prospective source rocks and hydrocarbon production in the basin. Results indicate that certain thin intervals in specific units can generate moderate quantities of gas and less oil. The oil from the Bahariya reservoir primarily comes from the AEB rocks, with minimal contribution from the Khatatba Formation. Normal faults in the area serve as migration pathways from deeply buried source rocks to shallower reservoirs.
MODELING EARTH SYSTEMS AND ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Perveiz Khalid, Muhammd Irfan Ehsan, Shahzada Khurram, Irfan Ullah, Qazi Adnan Ahmad
Summary: This study re-evaluates the reservoir characteristics and facies identification of the Sui Main Limestone in the Qadirpur field of Pakistan's Middle Indus Basin using petrophysical analysis and rock physics modeling. The study finds that the limestone exhibits micro-fractures and well-connected secondary pores, and the clean carbonate intervals have the potential for hydrocarbon accumulation. This research is significant for improving reservoir quality prediction in heterogeneous carbonate reservoirs and optimizing field development.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
John Gama, Lorenz Schwark
Summary: This study presents a comprehensive geochemical analysis of source rock intervals in the Mandawa Basin, Tanzania, to determine organic matter types and quality. The results show that the organic matter richness is low and the potential for oil generation is generally fair. The study also reveals high spatial variability in organic matter quality in the region.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Mohamed A. Khalil, Mostafa G. Temraz, R. M. Joeckel, Osama M. Elnaggar, Hesham H. Abuseda
Summary: This study presents a method for estimating the hydraulic conductivity of rock strata in the Qarun oil field and shows that resistivity logs can be used to assess the flow properties of a reservoir.
PURE AND APPLIED GEOPHYSICS
(2022)
Article
Energy & Fuels
Sherif Farouk, Souvik Sen, John D. Pigott, Mohammad Abdelfattah Sarhan
Summary: This study evaluated the petrographical and petrophysical characteristics of the Rahmi sandstone gas reservoir in the southern Gulf of Suez. The study found differences in porosity and water saturation between the East Matr and Amal fields, with the Rahmi sandstone depositing in a high energy shoreface environment in close proximity to the hinterland.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2022)
Article
Energy & Fuels
Majid Alipour, Bahram Alizadeh, Shohreh Mirzaie, Ali Chehrazi
Summary: The study area in the southeastern Persian Gulf basin shows lateral migration of hydrocarbons from east to west, with facies patterns and geodynamic evolution controlling the distribution and quality of hydrocarbon accumulations. The calibrated 2D model accurately predicts most present-day hydrocarbon occurrences in the area and explains variations in their properties.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Article
Energy & Fuels
O. L. Ayodele, T. K. Chatterjee, M. Opuwari
Summary: The study focused on evaluating the reservoir heterogeneity of the Valanginian depositional sequence in the Gamtoos Basin of South Africa. A 3D static reservoir model was generated by integrating seismic and well-log data to understand the spatial distribution of reservoir properties. Results showed that sandstone facies had the best petrophysical properties for potential hydrocarbon production in the basin.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Article
Energy & Fuels
Mohammad A. Abdelwahhab, Emad H. Ali, Nabil A. Abdelhafez
Summary: The uncertainties in determining the processes of the petroleum system, such as coincidences, entrapment, and charge timing, as well as reservoir heterogeneity, pose significant risks in petroleum exploration and development. Therefore, a comprehensive subsurface visualization of the petroleum system is crucial. In this study, static reservoir modeling and petroleum system analysis workflows were combined to characterize the Cen-omanian fluvio-marine reservoir in Egypt's Abu Gharadig Basin. The integration of 2D seismic profiles and well logs allowed for the identification of reservoir properties, as well as the timing of charge, migration pathways, and accumulation sites. The results proposed a new hydrocarbon prospect area for further oilfield development, demonstrating the importance of integrated modeling approaches for poorly-defined petroleum systems.
Article
Energy & Fuels
Mohammad A. Abdelwahhab, Nabil A. Abdelhafez, Ahmed M. Embabi
Summary: This study focuses on the sedimentary facies analysis of the Paleozoic Nubia clastics in the West Esh El Mallaha Concession (southwest Gulf of Suez rift), employing various disciplines such as sequence stratigraphy, seismic stratigraphy, GR-log motifs, and seismic waveform segmentation to depict reservoir heterogeneity and quality. Organic maturity prediction is also crucial in confirming hydrocarbon charging from source units to reservoir intervals. A 1D basin model was established to define past geologic events and their controls on sedimentary basin evolution and petroleum potential. The interdisciplinary approach used in this study successfully characterizes ancient environments and their hydrocarbon potential. The results indicate that the Nubia Formation was deposited during the lowstand-transgressive phase of a 3rd order depositional sequence and contains significant reservoir facies in the form of fluvial channels and mouth bars. The high-quality reservoir facies of the deltaic mouth bars should be considered for further oilfield development plans in similar settings. Overall, the importance of this study is rated as 8/10.
Article
Geosciences, Multidisciplinary
Ahmed Mansour, Michael Wagreich
Summary: The Coniacian-Santonian period was characterized by differentiated marine sedimentation, with organic carbon-rich black shales and carbonates contrasting with organic carbon-poor white/reddish limestones known as Cretaceous Oceanic Red Beds. Statistical analysis of geochemical and isotope proxy data from over 95 study sites led to the reconstruction of high-resolution global carbon isotope curves for C-S carbonate and organic matter, revealing three short-duration, globally recognizable carbon isotope excursions. These excursions were characterized by regionally restricted benthic anoxia and sea-level highstands, explaining the accumulation of organic matter during the OAE3 subevents.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Ahmed Mansour, Adedoyin Adeyilola, Thomas Gentzis, Humberto Carvajal-Ortiz, Natalia Zakharova
Summary: This study investigates the Upper Devonian Antrim Shale Formation in the Michigan Basin, providing insights into biostratigraphy, paleoenvironment, sea level fluctuations, organic matter properties, and source rock potential. The research reveals high organic matter content and excellent hydrocarbon generating potential in the Norwood, Lachine, and Upper members, while the Paxton Member has poor to fair organic richness and low hydrocarbon potential.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Ahmed Mansour, Thomas Gentzis, Sameh S. Tahoun, Mohamed S. Ahmed, Michael Wagreich, Humberto Carvajal-Ortiz, Jacob Neumann, Ahmed E. Radwan
Summary: During the Early Cretaceous (Albian), there was a global warming and increased environmental perturbations, resulting in the accumulation of organic carbon-rich sediments. In the southern margin of the Tethys Ocean, there were shallow water conditions with some phases of bottom water anoxia. The Kharita Formation in the Abu Gharadig Basin underwent palynological analysis, organic matter characterization, hydrocarbon generation potential assessment, and thermal maturity assessment.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Munir Elmahdy, Ahmed A. Radwan, Bassem S. Nabawy, Ahmed Abdelmaksoud, Aleksey V. Nastavkin
Summary: This study focuses on the structural setting and reservoir characterization of the Cenozoic reservoirs in the Waihapa Field, Taranaki Basin, New Zealand, using a combination of 3D seismic survey, core and well logs data, and petrographic description. The results reveal the presence of major thrust faults and normal faults, as well as variations in reservoir properties and compositions among different lithofacies. The Mount Messenger Formation exhibits the best reservoir quality while the Tikorangi Formation has the lowest quality.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Ahmed Mansour, Sameh S. Tahoun, Aya Raafat, Mohamed S. Ahmed, Francisca Oboh-Ikuenobe, Thomas Gentzis, Xiugen Fu
Summary: This study conducted a comprehensive analysis of the Middle Jurassic in the north Western Desert, Egypt, and identified four different paleoenvironmental characteristics. The results showed that organic carbon-rich fine siliciclastic and carbonate deposits were predominantly found in the area. The composition of particulate organic matter, plant debris, and dinoflagellate cysts, as well as the types of organic matter in the rocks, reflected the depositional paleoenvironmental patterns. These findings are of great significance for a better understanding of the paleoenvironmental evolution and hydrocarbon potential in the region.
Article
Geochemistry & Geophysics
Ahmed Mansour, Sameh. S. S. Tahoun, Aya Raafat, Mohamed. S. S. Ahmed, Thomas Gentzis
Summary: This study conducted a detailed palynomorph and palynofacies analysis of the Middle Jurassic Khatatba Formation in the Dahab-Mireir Basin, revealing moderately diverse palynomorph assemblage and palynofacies. The findings provide insights into different depositional environments and relative sea level changes, which are of significant importance for understanding basin history, reservoirs, and source rock units.
Article
Geochemistry & Geophysics
Mahmoud Leila, Ahmed A. Radwan, Mohamed I. Abdel-Fattah
Summary: The Taranaki Basin in New Zealand is a promising area for hydrocarbon exploration and development, particularly in the Rakopi Formation where coal and mudstone lithofacies have the potential to generate oil. The organic carbon in these lithofacies originated from oxygenated bottom water and was preserved due to swift burial. The coal is less mature and contains a mixture of different macerals, while the mudstone lithofacies are enriched in liptodetrinite. Biomarkers in both the coal and mudstone extracts confirm the presence of oil generation in the Rakopi Formation.
Editorial Material
Geosciences, Multidisciplinary
Mahmoud Leila, Ahmed A. Radwan, Mohammad A. Abdelwahhab, Isabelle Moretti
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Energy & Fuels
Amir Ismail, Ahmed A. Radwan, Mahmoud Leila, Ahmed Abdelmaksoud, Moamen Ali
Summary: The article introduces a novel unsupervised machine learning method, which combines unsupervised vector quantization neural network (UVQ-NN) with meta-geometrical attributes to effectively detect fault patterns, fracture network zones, and small-scale faults in high-resolution 3D seismic structural interpretation. This method plays a crucial role in locating prospective well sites and building 3D structural models while saving time and cost. The innovation lies in the integration of geostatistical and structural filtering techniques with optimal geometrical seismic attributes to automatically extract major faults, fracture network zones, and small-scale faults.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2023)
Article
Energy & Fuels
Ahmed Rezk Hassan, Ahmed A. Radwan, Kamel H. Mahfouz, Mahmoud Leila
Summary: This study investigates the petrophysical characteristics of the Khatatba reservoir facies and determines the different reservoir rock types (RRTs) using seismic, wireline logs, and conventional core data. The results show that the Khatatba Formation consists of three different RRTs, with RRTI having a well-connected pore network and RRTIII containing more carbonate and clay components that affect the pore system connectivity. The study highlights the link between depositional, compositional attributes and the spatial distribution of the different RRTs, providing important insights into the geological properties and spatial distribution of the Khatatba reservoir.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2023)
Article
Energy & Fuels
Bassem S. Nabawy, Alaa Mostafa, Ahmed A. Radwan, Abdelrahman G. Kotb, Mahmoud Leila
Summary: This study focuses on the reservoir characteristics and facies distribution of the Lower Miocene syn-rift Rudeis reservoir in the July oilfield. Data interpretation reveals four different seismic facies in the Rudeis Formation with varying net pay thickness. The best reservoir facies are found in submarine channels and fans containing coarse-grained, clean sandstones.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Ahmed A. Radwan, Bassem S. Nabawy, Ahmed A. Kassem, Munir Elmahdy
Summary: This research aims to determine the geological structure of Taranaki Basin in New Zealand and its impact on the hydrocarbon potential of the basin, specifically the Pohokura Field. Seismic data and reservoir characterization studies were conducted to achieve this goal. The study identified eight lithofacies in the Pohokura Field and characterized the reservoir quality of the Mangahewa reservoir.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Review
Geosciences, Multidisciplinary
Fuquan Yang, Xinxia Geng, Zhixin Zhang, Guoren Liu, Hanqing Zhang
Summary: Northern Xinjiang in China is an important part of the Central Asian Orogenic Belt, characterized by multiple episodes and types of mineralization. Cu and Au deposits are mostly found in Altay, Junggar, and Tianshan, with minor occurrences in Beishan. The most common types of Cu-Au deposits are volcanogenic and porphyry deposits. The formation of Cu-Au deposits can be divided into five mineralization episodes, with the Devonian and Carboniferous being the main periods. These deposits developed in various tectonic settings, including island arc, continental arc, collision, and postcollisional extensional tectonics.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Jiang Zhu, Dan-yang Liu, Chao Chen, Song Chen, Yuan-bing Zou, Leonid Danyushevsky, Jing-meng Huang, Xiang-wei Tang
Summary: Numerous lode gold and silver deposits have been discovered in orogenic belts in China. This study focuses on the formation and fluid evolutions of the super-large Yingdongpo gold and giant Poshan silver deposits in the Tongbai-Dabie orogen. The results suggest that both deposits were formed concurrently with Early Cretaceous granitic magmatism and the ore-forming fluids were primarily of magmatic origin with meteoric water inputting. The gold mineralization is related to a change in the physicochemical properties of the fluids, while the silver mineralization is favored by progressive deposition of sulfides in a slowly cooling hydrothermal system.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Arun Bhadran, B. P. Duarah, Drishya Girishbai, Mohammad Atif Raza, Avi Mero, Sandeep Lahon, A. L. Achu, Girish Gopinath
Summary: The Brahmaputra foreland basin, known for its dynamic tectonism and sediment load, exhibits a variety of seismically generated soft sediment deformation structures (SSDS) such as clastic dikes, sand sills, and micro-faults. These structures, influenced by multiple strong seismic events, are characterized by their dimensions, intrusion angles, cross-cutting relations, wall shattering, and age. The study suggests that a significant earthquake with high intensity and magnitude might have caused liquefaction features in the area. The findings highlight the importance of studying SSDS in tectonically active regions with limited surface ruptures and dense alluvial cover.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Huan Wang, Lirong Dou, Xingyang Zhang, Jiquan Yin, Beiwei Luo, Haigang Duan, Peiguang Yang, Yifan Song
Summary: Quantitative analysis of sediment composition and microfacies helped identify changes in facies belts in the Cretaceous Mishrif Formation. The study demonstrated the importance of carbonate microfacies quantification and its implications for paleogeographic research.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Boran Wang, Zhilong Huang, Dongsheng Xiao, Haiyue Yu, Wenren Zeng, Xin Wang, Tong Qu, Zhiyuan Li, Yizhuo Yang
Summary: By systematically analyzing the source rocks of the Sangonghe Formation in the Taibei Sag, NW China, and using kerogen kinetics modeling, this study reveals the influence of geological conditions on hydrocarbon generation and expulsion. The source rocks in different environments show distinct geochemical characteristics and hydrocarbon generation potential.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Haiying Yang, Zhifang Zhao, Haifeng Fan, Min Zeng, Jiafei Xiao, Xiqiang Liu, Shengwei Wu, Jiangqin Chao, Yong Xia
Summary: This paper investigates the REE enrichment and the role of Fe/Mn (oxyhydr)oxides in marine phosphorites from the early Cambrian period in South China. The study reveals that Fe/Mn (oxyhydr)oxides play a crucial role in REE enrichment and are controlled by Fe-redox pumping.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Qing Li, Hongbin Wang, Feng Cai, Di Luo, Fanxing Kong, Ang Li, Xiting Liu
Summary: The elemental and isotopic compositions and abundance of carbonates in marine sediments are used to reconstruct ancient climate and ocean conditions. This study analyzed sediment samples from the Okinawa Trough to examine the relationship between carbonates' compositions and methane seepage and sea-level changes. The results indicate that both biogenic and authigenic carbonates are important factors in understanding paleoclimate and paleoceanography.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Maryam Akbarzadeh Aghdam, Abdolreza Ghods, Farhad Sobouti, Khalil Motaghi, Keith Priestley, Mohammad Enayat
Summary: The Makran subduction zone is difficult to monitor due to limited seismic activity, but a temporary seismic network was installed to investigate the relationship between different regions and detect seismicity. The observed seismicity suggests the presence of structural boundaries and seismically inactive areas.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Zhen-Yu Wang, Hong-Rui Fan, Hai-Dong She, Kui-Feng Yang
Summary: This study conducted detailed geochemical, geochronological and isotopic analyses on the Songxian syenite in the Qinling Orogen. The results revealed the magma sources, petrogenesis and geodynamic implications of this alkaline intrusion. The study suggests that the syenite was formed through multiple stages of magmatism, involving the partial melting of the enriched lithospheric mantle and mixing with melts derived from the lower crust.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Yu Li, Wen-Liang Xu, Xiao-Ming Zhang, Jie Tang
Summary: This study presents new zircon U-Pb-Hf and whole-rock geochemical data for Jurassic intrusive rocks in the Yanbian area of NE China, providing insights into the subduction history of the Paleo-Pacific Plate. The study reveals three stages of Jurassic magmatism in the area, indicating the presence of an active continental margin related to the initial subduction of the Paleo-Pacific Plate beneath the Eurasian continent.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Lina Ai, Shengfa Liu, Shuai Cong, Hui Zhang, Peng Cao, Kaikai Wu, Wenxing Ye, Che Abd Rahim Mohamed, Xuefa Shi
Summary: This study investigates the depositional configurations and sedimentary environments of the Malacca Strait through analyzing grain size characteristics and hydrographic data. The results show that residual sediments are concentrated in the central region, while modern terrigenous sediments are distributed along the coast of Malaysia and the northern region. The sedimentary environments are influenced by seasonal variations and hydrodynamic conditions.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Liang Xiao, Jia-qi Liang, Li-yan Guo, De-shuang Ji, Man Yuan, Xiang-chuan Li, Nan Sun, Zuo-chen Li
Summary: This study investigates the correlation between stable carbon isotopes of plant fossils and CO2 levels in the Jurassic period. The results suggest a weak correlation between the two, indicating caution is needed when using stable carbon isotopes to reconstruct high paleo-CO2 concentrations.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Xuli Yang, Feng Huang, Jifeng Xu, Xijun Liu, Liying Zhang, Zhao Zhang, Benyan Xu, Man Zhang, Yunchuan Zeng, Qian Liu, Mingda Lv
Summary: The extensively developed Early Cretaceous intermediate-felsic rocks in the northern North China Craton provide valuable insights into the nature of Paleo-Pacific subduction and associated geodynamic processes. Geochemical and geochronological analyses of trachyandesites and rhyolites from the eastern Hebei, northern NCC suggest that the trachyandesites likely originated from enriched mafic lower crust and the rhyolites are derived from the trachyandesitic magmas through fractional crystallization. The migration direction change of these rocks is believed to be primarily attributed to slab rollback of the subducting Paleo-Pacific Plate.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Wei Liu, Ping Gao, Xianming Xiao, Yanming Zhao, Yijie Xing, Jinku Li
Summary: The organic-rich shales of the Shuijingtuo Formation in China are an important target for shale gas exploration. The upper section of the formation, primarily consisting of limestone, silty shale, and black shale, has been rarely studied but recently showed promising results for shale gas exploration. Geochemical investigations of the upper section shale deposits revealed that the organic matter enrichment mechanism underwent dynamic changes due to relative sea-level changes and episodic upwelling activities.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Xin Wang, Chen Zhang, Zixin Xue, Qianyou Wang, Zhenxue Jiang, Kun Zhang, Xiangye Kong
Summary: This study analyzed the heterogeneity of gas compositions and the effects of magmatism on gas accumulation in shale gas exploration in the Yangtze plate. The results showed that magmatism caused the development of micro-fractures in shale reservoirs and accelerated the thermal evolution rate of organic matter. The impact of magmatism on shale gas accumulation varied in different regions, either favoring or compromising efficient gas accumulation in shale reservoirs.
JOURNAL OF ASIAN EARTH SCIENCES
(2024)