Article
Chemistry, Multidisciplinary
Wenguang Kan, Zailin Yang, Liangliang Yu, Menghan Sun
Summary: This study investigates the petrogeochemistry of the Late Pleistocene Guxiangtun Formation and Holocene Wenquanhe Formation in Northeast China using drilling and geochemical analyses, revealing a mixed provenance with a predominant influence from recycled sedimentary sources and medium degree of chemical weathering.
APPLIED SCIENCES-BASEL
(2022)
Article
Geosciences, Multidisciplinary
Biao Gao, Jitao Chen, Xing Huang, Hao Xin, Quanfeng Zheng
Summary: The tectonic setting of South China during the late Paleozoic is crucial for understanding the geodynamics of the eastern margin of the Pangea supercontinent. By studying the late Carboniferous siliciclastic rocks in southeast South China, it is revealed that there was episodic lithospheric delamination and subduction of the paleo-Pacific plate beneath the South China Block in the late Paleozoic.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Ayon Saha, Dhiman Kumer Roy, Rahat Khan, Tahsin Islam Ornee, Sukhen Goswami, Abubakr M. Idris, Pradip Kumar Biswas, Umma Tamim
Summary: The geochemical compositions, provenance, climate, weathering intensity, and tectonic setting of sediments from the Padma River in Bangladesh have been studied. The results suggest that the sediments are chemically immature arkose that originated from the Higher Himalaya under semi-arid to semi-humid climatic conditions. The sediments have a felsic source origin and were deposited in a passive continental margin.
Article
Geosciences, Multidisciplinary
Faiz Ahmad, Mohd Amir, Mohammad Adnan Quasim, Nurul Absar, Abul Hasnat Masood Ahmad
Summary: The detrital mineralogy and geochemical characteristics of the Middle Jurassic Fort Member Sandstone in Western India provide insights into paleoweathering, sediment provenance, and tectonic setting. The sandstones exhibit moderate to intense chemical weathering and originate mainly from felsic igneous rocks. Geochemical analysis suggests a passive margin tectonic setting.
GEOLOGICAL JOURNAL
(2022)
Article
Energy & Fuels
Nura Abdulmumini Yelwa, Khairul Azlan Mustapha, Mimonitu Opuwari, Azharuddin Abd Aziz
Summary: The study integrated molecular geochemistry, inorganic and isotopic studies to recognize the geochemical characteristics of sediments from the Aptian to Campanian periods in the Western offshore to Central Orange Basin. The results showed that the sediments were predominantly influenced by marine sources, with some samples being thermally mature enough to produce petroleum. Geochemical analysis also indicated a continental rift of passive margin settings, revealing the breakup of Gondwana and the opening of the Atlantic Ocean Margin.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Mahmoud Elnobi, Bashar Bashir, Abdullah Alsalman, Hussein Bachir
Summary: This study investigates the tectonic activity in the Gulf of Suez area through geomorphic analysis. It finds varying levels of fault activity and high river gradients. The eastern segments may exhibit higher seismic signals, calling for further research on seismic hazards.
APPLIED SCIENCES-BASEL
(2022)
Article
Geosciences, Multidisciplinary
Zhenjun Zhu, Qi Li, Hehe Chen, Jian Li, Weiping Zhang, Yong Liu, Zehao Yan
Summary: This study reconstructed the tectonic-geomorphological evolution of the Middle Jurassic-Lower Cretaceous in the Junggar Basin and analyzed the responses of sequence stratigraphy, sediment provenance, and depositional systems. The results indicate that tectonic-geomorphological evolution and climate change jointly controlled the sediment sources and determined the depositional features in the basin.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Shengqiang Zeng, Jian Wang, Xiugen Fu, Wenbin Chen, Chunyan Song, Xinglei Feng, Dong Wang
Summary: This study reports the sedimentary rock characteristics of the Lower Jurassic Quemo Co Formation in the northern Qiangtang Basin, with analyses of rock major-trace elemental compositions and detrital zircon geochronology to infer paleoenvironment, provenance, and tectonic setting. The results suggest that the mudstones were mainly derived from intermediate igneous rocks with subordinate felsic igneous rocks and the sediment source was likely a collision tectonic setting.
GEOLOGICAL JOURNAL
(2021)
Article
Environmental Sciences
Milan Stafford Tchouatcha, Arnaud Patrice Kouske, Primus Azinwi Tamfuh, Epimarc Gildas Tchameni Ngouabe, Gerald Chuye Yango
Summary: The Betare-Oya Gold District in East Cameroon has various types of mining, with the study site being an open-cast mine in an alluvial plain. The deposition of different facies and energy sediments indicates a recent tectonic event followed by rapid deposition from fluvial and gravity inputs. The gold deposits in the area come from multiple sources, including vein sources and sedimentary sources, linked to the reactivation of the Precambrian Sanaga fault.
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2023)
Article
Geochemistry & Geophysics
Sheree E. Armistead, Alan S. Collins, Renata S. Schmitt, Raisa L. Costa, Bert De Waele, Theodore Razakamanana, Justin L. Payne, John D. Foden
Summary: The study compared Paleoproterozoic sedimentary sequences in Madagascar, Africa, and India using detrital zircon U-Pb and Hf data, revealing similarities in age and isotopic characteristics. A new concept of the Greater Itremo Basin was proposed to explain the extensive sedimentary coverage in late Paleoproterozoic Madagascar. The research also suggested a new Paleoproterozoic plate tectonic configuration where central Madagascar is connected to the Tanzania Craton and Southern Granulite Terrane.
Article
Geosciences, Multidisciplinary
Francis Temgo Sopie, Gabriel Ngueutchoua, John S. Armstrong-Altrin, Theophile Njanko, Aristide Nadine Sonfack, Yannick Steve Ngagoum Kontchipe, Daoud Fossa, Lesly Tawani Tembu
Summary: The lithology and extent of the basement rocks hidden under thick lateritic covers in the southern Gulf of Guinea are not well documented. This study examined the mineralogy and chemical composition of beach sediments to determine their provenance, paleoweathering, and tectonic setting. The results suggest that the beach sediments are recycled and have undergone moderate weathering. They have a felsic provenance and reflect the influence of abundant metasediments from the Nyong Paleoproterozoic, Pan-African Neoproterozoic, and Douala-Kribi-Campo basins. Paleotectonic analyses indicate rift and passive margin settings.
JOURNAL OF EARTH SYSTEM SCIENCE
(2023)
Article
Geochemistry & Geophysics
Lydia Olaka, Cynthia J. Ebinger
Summary: As dynamic processes in the Earth's mantle stretch and thin the African plate, broad plateaus interrupted by deep valleys and flanking mountains have formed. These movements occur concurrent with global climate changes. Together, they modulate eastern Africa's habitats for early humans and other organisms. The uplift of the plateau in Ethiopia, which initiated around 30 million years ago, played a role in the evolution of humans. The sedimentary sequences in rift basins record the history of human evolution and the complex interplay between climate change, uplift, volcanism, and faulting in equatorial Africa. The lake shorelines and hydrothermal systems provided oases for early hunter-gatherers, and the topography of the faulted landscape may have served as refugia.
Article
Geosciences, Multidisciplinary
Lin Chen, Baomin Zhang, Shu Jiang, Xiaohong Chen, Guotao Zhang, Jingyu Zhang, Wei Wei, Yangbo Lu, Ping Chen, Weibing Lin, Zhanhong Liu
Summary: The geochemical characteristics of the organic-rich shale in the Lower Cambrian Shuijingtuo Formation were investigated in this study to determine its provenance, weathering conditions, sedimentary recycling, paleoclimate, and tectonic setting. The shale is enriched in CaO, P2O5, Mo, U, V, Cd, and Cu, and shows light rare earth element (LREE) enrichment and heavy rare earth element (HREE) depletion, with weak negative Eu and Ce anomalies. The analysis suggests that the shale was primarily derived from a mixture of intermediate and felsic igneous source rocks, similar to TTGs in composition. The source area of the shale experienced low to moderate degrees of chemical weathering under different climatic conditions. The sedimentation of the shale occurred during the first cycle of deposition in a passive margin tectonic setting, with the Ezhong old land as the predominant source area.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geology
Raif Kandemir, Merve Ozyurt, Orhan Karsli
Summary: The Senkoy Formation in the eastern Sakarya Zone of Turkey is a significant unit for understanding the Mesozoic tectonic evolution. Through detailed petrographic and geochemical analysis of sandstone samples, it is suggested that the sediments likely experienced low chemical weathering processes and were deposited in an open sea environment during the Early Jurassic transgressive period. Different geochemical signatures in the sandstone samples indicate varying provenance and source rock contributions, with potential links to ancient magmatic arc generation due to subduction of Palaeotethys.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
Nagarajan Ramasamy, Kessler Franz, John Jong, Ramkumar Muthuvairavasamy, Abdulmajid Ali Muhammad, Vivian Dayong, Lalitguha Shanmugarajah, Natalie Vusak, Kovin Sivanasvaran, Desianne Kinanthi
Summary: The stratigraphic records of the Palaeocene-Eocene provide valuable information on environmental and climatic signals. The study of turbiditic sedimentary rocks in NW Borneo reveals insights into palaeoweathering, tectonic setting, and provenance, with a primary source area of felsic rocks from the Schwaner Mountains. The sediments suggest a transition from an active continental margin setting in the Palaeocene to a passive margin setting in the Eocene.
GEOLOGICAL JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Emad S. Sallam, Mohamed M. Afife, Mohamed Fares, A. J. (Tom) van Loon, Dmitry A. Ruban
Article
Geosciences, Multidisciplinary
Emad S. Sallam, Mohamed A. Abd El-Samee, Olessia R. Bobrysheva, Natalia N. Yashalova, Dmitry A. Ruban
ARABIAN JOURNAL OF GEOSCIENCES
(2020)
Article
Geosciences, Multidisciplinary
Emad S. Sallam, Dmitry A. Ruban, Moataz T. Mostafa, Menna Kh. Elkhodery, Rufida L. Alwilily, Tatyana K. Molchanova, Svetlana O. Zorina
ARABIAN JOURNAL OF GEOSCIENCES
(2020)
Article
Geology
Emad S. Sallam, Dmitry A. Ruban
CARBONATES AND EVAPORITES
(2020)
Article
Geosciences, Multidisciplinary
H. A. Wanas, A. M. Abu Shama, S. A. El-Nahrawy
JOURNAL OF AFRICAN EARTH SCIENCES
(2020)
Article
Geosciences, Multidisciplinary
Noha M. Mashaal, Emad S. Sallam, Tarek M. Khater
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2020)
Article
Geosciences, Multidisciplinary
Sandor Kele, Emad S. Sallam, Enrico Capezzuoli, Mike Rogerson, Hamdalla Wanas, Chuan-Chou Shen, Mahjoor Ahmad Lone, Tsai-Luen Yu, Andrew Schauer, Katharine W. Huntington
Summary: Tufa deposits in the Kurkur-Dungul area in southern Egypt date back to marine isotope stage 11 to 1, reflecting changes in atmospheric circulation over the Indian Ocean. Egypt lies at the intersection of two different rainfall provinces, showing timing differences with orbital forcing and water source regions. The study suggests that the spring systems in the region are not part of a larger system spanning northern Africa and lack interactions between northern hemisphere heating and mid-latitude rainfall.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2021)
Editorial Material
Geosciences, Multidisciplinary
Emad S. Sallam, Kamal Abou-Elmagd
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
R. Abd-Elhakim, M. A. El-Samee, E. S. Sallam
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Emad S. Sallam
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
Article
Geology
Emad Samir Sallam
Summary: The Quaternary calcareous tufas precipitated in the Kurkur Oasis area provide valuable information about the environmental conditions during their formation. The tufas consist of low-Mg calcite and are composed of various components including pisoliths, oncoids, intraclasts, lithoclasts, stromatolites, and encrusted plant materials. These tufas were formed within a karstified carbonate terrain by a paleospring system fed by rainwater. The isotope-geochemical analysis indicates that these tufas were deposited from meteoric water in regions with abundant precipitation.
CARBONATES AND EVAPORITES
(2022)
Article
Environmental Studies
Emad S. Sallam, Dmitry A. Ruban, Vladimir A. Ermolaev
Summary: Geoheritage in the Qattamiya-Galala Corridor in Egypt has been evaluated and identified as a valuable geological resource. This study assessed 15 geosites based on their uniqueness, accessibility, scientific importance, and touristic potential. These geosites have been actively used for geosciences education and research, but there is still potential for further tourism development. The establishment of a geopark and attention to waste management are important aspects of the geoheritage resources policy.
Article
Geosciences, Multidisciplinary
Dmitry A. Ruban, Emad S. Sallam, Vladimir A. Ermolaev, Natalia N. Yashalova
Article
Geology
Dmitry A. Ruban, Emad S. Sallam
Article
Geosciences, Multidisciplinary
Samuel Yaw Danso, Yi Ma, Adams Osman, Isaac Yeboah Addo
Summary: This study conducted a spatial assessment and mapping of flood hazards in the Sekondi-Takoradi Metropolis (STM) of Ghana using the Analytical Hierarchy Process (AHP) and geographical information system. The results indicate that about 12% of STM lands are in very high flood zones and 24% are in high flood zones. The lower portions of STM are identified as the most susceptible to inundation. These findings provide valuable insights for effective flood planning and prevention in STM.
JOURNAL OF AFRICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Kesyton Oyamenda Ozegin, Stephen Olubusola Ilugbo
Summary: The study utilizes analytical hierarchical process and geoinformatics-based approaches to define groundwater potential zones in Edo State, Nigeria. The results show that high groundwater potential zones are mainly located in Edo-central and isolated portions of Edo-south, while low to very low potential zones are found in the study's northern region.
JOURNAL OF AFRICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Maham Eboubekrine Sedigh, Houssa Ouali, Michel Jebrak, Abdelkader Mokhtari
Summary: The carbonatites from the Richat dome in Mauritania are unique and underdocumented geological features. This study provides insight into the mineralogy and petrogenesis of the carbonatites, revealing three identified types and their association with spinel-bearing peridotite. The geochemical characteristics of the Richat carbonatites are similar to other Cretaceous alkaline carbonatite occurrences in different regions, suggesting a common geological process. The reactivation of a deep pan-African lineament is considered a fundamental factor in the formation of the Richat carbonatites.
JOURNAL OF AFRICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Riadh Aouissi, Gamal Mohamed El Qot, Sihem Salmi-Laouar, Catalina Gomez-Espinosa, Blanca E. Buitron-Sanchez
Summary: Twenty-one gastropod species have been identified in the Cenomanian deposits of Bellezma-Aures mountains, eastern Saharan Atlas, Algeria, with four of them recorded for the first time in the Batna mountains. These gastropods are mainly found in the 'Marnes de Smail' Formation, and their community changes may be attributed to minor sea-level fluctuations, sedimentation rate variations, and hydrodynamics. The paleobiogeographic distribution of these gastropod assemblages indicates a tethyan affinity and faunal exchange during that time interval.
JOURNAL OF AFRICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Behnam Esmaeili, Sirous Hosseinzadeh, Ali Kadkhodaie, David A. Wood, Samira Akbarzadeh
Summary: This research applies image analysis and clustering algorithms to estimate porosity and permeability of petroleum reservoir rocks, and demonstrates that the results from image analysis are consistent with traditional analysis methods, with acceptable correlation. In addition, different depositional environments and hydraulic flow units are identified through image analysis.
JOURNAL OF AFRICAN EARTH SCIENCES
(2024)
Article
Geosciences, Multidisciplinary
Jianqi Zhuang, Jianbing Peng, Zhenhong Li, Yanqiu Leng, Xinghua Zhu, Weiliang Huang, Zhijie Jia, Yang Liu, Yi Zhu
Summary: The study on gully erosion in the East African Rift Valley of Kenya reveals that human activities and rainstorms are the main factors causing erosion. Gully erosion poses a serious threat to the ecological environment, particularly the man-made and fissure-induced gullies that should be further investigated.
JOURNAL OF AFRICAN EARTH SCIENCES
(2024)