Article
Geosciences, Multidisciplinary
Shamik Bose, Michael Sullivan
Summary: The study reveals the salt deformation mechanisms and flow characteristics in the Santos and Campos basins offshore Brazil. The results show that changes in paleo-topography play a key role in the overall salt flow, and gravity-driven mobilization of salt occurred early. Additionally, the mechanical stratigraphy within the LES has a significant impact on salt structural styles.
JOURNAL OF STRUCTURAL GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
David A. Pollitt, Shaoqing Sun
Summary: This study examines the exploration potential for two prospects in offshore Uruguay, using minimal prior information. Prospect A represents a typical prospect within the Cretaceous turbidite play, while Prospect B represents a typical prospect within the Cretaceous shallow-marine sandstone play. The study benchmarks these prospects using four filters and analyzes their potential. Prospect A shows high potential while there is significant uncertainty for Prospect B, but it is deemed to be a viable play based on context analysis.
Article
Environmental Sciences
Eloa Correa Lessa Tostes, Luisa Maria de Souza Viana, Karoline Fernanda Ferreira Agostinho, Cibele Maria Stivanin de Almeida, Carlos Eduardo Veiga de Carvalho
Summary: This study analyzed the concentrations of 15 toxicologically important trace elements in the livers of 110 green turtles stranded in two areas of the Brazilian coast. The results showed significant differences in trace element concentrations between the two study areas, which may be influenced by multiple factors.
MARINE POLLUTION BULLETIN
(2023)
Article
Geosciences, Multidisciplinary
M. Ismaiel, K. S. Krishna
Summary: The study investigates the gravity signatures corresponding to sediment load over the East India Passive Margin (EIPM) using seismic reflection, free-air gravity and well information. The results reveal variable lithospheric characteristics within different structural domains along the margin, suggesting three different modes of rifting - transform, hyperextended, and hypoextended. In the oceanic domain, the lithospheric strength increases with age, and the thick sedimentary basin of the Bay of Bengal has experienced significant rheological strengthening. The reasons for this strengthening include changes in shear-wave velocity anomaly, plate curvature, and stress state caused by various geological interactions.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geography, Physical
Marlise Colling Cassel, Farid Chemale Jr, Mateus Rodrigues Vargas, Marcelo Kehl de Souza, Tiago Jonatan Girelli, Gisela Serejo de Oliveira
Summary: The Cenozoic depositional history of the Pelotas Basin was influenced by the spreading processes of the Atlantic Ocean and the formation of the Andean Cordillera. The study integrated seismic interpretation and backstripping techniques with evaluation of spreading rates in the South Atlantic and subduction beneath the Andes to uncover the main climatic, eustatic, and active tectonic events in the Cenozoic. The results showed the tectonic control of the Andean Cordillera over the Pelotas Basin's passive margin, as well as the influence of climatic and glacioeustatic changes driven by the opening of Drake Passage and the Antarctic Circumpolar Current.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Chemistry, Multidisciplinary
Ke Geng, Zhixin Wen, Xueling Wang, Zhaoming Wang, Zhengjun He, Chengpeng Song, Tianyu Ji, Hengxuan Li
Summary: This paper studies the structural characteristics and sedimentary filling differences of the passive continental margin basins of East Africa and establishes hydrocarbon accumulation models in different basins. It divides the East African passive continental margin basins into four types based on the prototype stages and sedimentary filling thickness differences, and discusses favorable accumulation combinations and future exploration directions.
APPLIED SCIENCES-BASEL
(2023)
Review
Geosciences, Multidisciplinary
Torgeir B. Andersen, Johannes Jakob, Hans Jorgen Kjoll, Christian Tegner
Summary: The Pre-Caledonian margin of Baltica in the Scandes exhibits complexities similar to modern margins, with features such as a microcontinent and different segments with varying magma content. The exhumed mantle peridotites and rocks from hyperextension before orogeny indicate a complex evolutionary history in this region.
Article
Geology
Jiri Zak, Jiri Slama, Reza Syahputra, R. Damian Nance
Summary: The Bohemian Massif in Central Europe formed from lithospheric fragments at the northern margin of Gondwana. The key geodynamic process that shaped this margin was the Cambro-Ordovician rifting that opened the Rheic Ocean. The mechanism of this rifting is reconstructed based on new U-Pb zircon ages, and it is suggested that stretching of the lower lithosphere preceded upper lithospheric rifting, leading to the breakup of Gondwana.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
M. Francisco Pereira, Carlos Fernandez, Carmen Rodriguez, Antonio Castro
Summary: The U-Pb ages of tonalite and migmatite samples from the Central Iberian Zone in Spain indicate a close relationship between Ordovician tonalitic magmatism and high-grade metamorphism. The age constraints on Santa Cruz tonalite and Risco Chico leucogranite provide evidence of a mixed contribution from old Ediacaran magmatic arc rocks and siliciclastic sequences. These findings contribute to the understanding of the Early-Middle Ordovician tectonic evolution of the northern Gondwana margin.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2022)
Article
Geosciences, Multidisciplinary
Weijiao Ma, Jinbu Li, Min Wang
Summary: The petroleum resource assessment obtained from laboratory tests on old core samples tends to underestimate the in situ resources. This study investigates the hydrocarbon loss and restoration by comparing preserved and exposed core samples. It is found that previous studies have severely underestimated the in situ hydrocarbon potential due to factors such as sample crushing and crucible waiting. A new restoration model is proposed to compensate for these losses.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Shaoyun Chen, Yongqiang Yang, Longwei Qiu, Xiaojuan Wang, Erejep Habilaxim
Summary: Quartz cement is an important authigenic mineral in the tight sandstones of the Shaximiao Formation in the Sichuan Basin. This study analyzed the silicon sources of the quartz cement using mineralogical, fluid inclusion, and geochemical data. The results showed that smectite alteration and dissolution of aluminosilicate minerals were the primary sources of silicon for quartz cementation. Contributions from volcanic material hydrolysis and pressure solution were relatively minor. The presence of chlorite films inhibited the development of quartz overgrowths and had minimal impact on reservoir quality.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xing Jian, Ping Guan, Ling Fu, Wei Zhang, Xiaotian Shen, Hanjing Fu, Ling Wang
Summary: This study presents a synthesis of new detrital zircon dating results and published data from the Cenozoic Qaidam basin, revealing the spatiotemporal variation of detrital zircon age populations and supporting models of synchronous deformation in northern Tibet. The study emphasizes the importance of considering textural and sedimentological parameters in zircon provenance interpretations, as well as the need for integrated provenance analysis involving other detritus components.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
A. Peketi, G. Sriram, A. Mazumdar, P. Dewangan, A. Zatale, V. Rajurkar, Gayatri Shirodkar, V. Mahale, V. Yatheesh
Summary: This study investigates 13 submarine seamounts in the southern Andaman volcanic arc and observes evidence of hydrothermal activity in one of the seamounts. The evidence includes plumes rich in dissolved gases, live chemosymbiotic organisms, and the deposition of neoforming minerals. These observations suggest the development of a new hydrothermal field in the least explored Andaman Sea.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Yanxian Zhu, Zhiliang He, Xiaowen Guo, Long Li, Sheng He, Jian Gao, Shuangjian Li, Huili Li
Summary: This study investigates the fluid evolution history of the hydrothermal dolomite reservoir in the Middle Permian Maokou Formation in the Sichuan Basin. The results reveal the diagenetic sequences, mineral origins, salinity history, and pressure evolution using various analytical techniques. The findings provide important insights into the gas charge, escape, and preservation conditions of the reservoir.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Rafaella de Carvalho Antunes, Julia Campos Guerrero, Ricardo Jorge Jahnert
Summary: This study presents a detailed sedimentary model and identifies various sedimentary facies associations in the coquina deposits of the Itapema Formation in the offshore pre-salt Buzios Field of the Santos Basin. These facies associations were primarily influenced by waves and currents and reflect a complex depositional system.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Kang Meng, Tongwei Zhang, Deyong Shao, Xiuyan Liu, Hui Song, Heng Peng
Summary: In this study, an integrated method of measuring optical reflectance and Raman spectroscopy is proposed to accurately determine the thermal maturity of Lower Cambrian shales in South China. The results show that this method is reliable and effective, and it has important implications for analyzing overmature shale.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Mohamed A. K. El-Ghali, Olga Shelukhina, Iftikhar Ahmed Abbasi, Mohamed S. H. Moustafa, Osman Salad Hersi, Numair A. Siddiqui, Khalid Al-Ramadan, Abdullah Alqubalee, Abdulwahab Muhammad Bello, Abduljamiu O. Amao
Summary: This study employs an integrated depositional and sequence stratigraphic approach to assess the control of diagenesis on reservoir porosity of a hybrid-energy delta system. The study focuses on the Barik Formation in the Haushi-Huqf region of Central Oman, which represents a highstand system tract of a hybrid-energy delta. The assessments reveal that the reservoir porosity is controlled by various degrees of diagenetic processes, including mechanically infiltrated clays and kaolinitization of silicate grains.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xiaocan Yu, Chunlian Wang, Hua Huang, Kai Yan
Summary: Oilfield brines are a significant alternative lithium resource. This study investigates the metallogenic characteristics and enrichment process of oilfield brines from the Jianghan Basin, central China using chemical and multi-isotope data. The results suggest that lithium enrichment in these brines is the result of interaction with clastic host rocks and dilution by meteoric water.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Jianghao Qiao, Xiwu Luan, Thanuja D. Raveendrasinghe, Yintao Lu, Guozhang Fan, Xinyuan Wei, Long Jin, Jian Yin, Haozhe Ma, Lushan Jiang
Summary: This study investigates the Tanintharyi passive continental margin in the Andaman Sea and reveals the potential of the Oligocene/Early Miocene carbonate platform in the region as a significant hydrocarbon reservoir. It also examines the influence of changes in sedimentary facies and the tectonic setting of the Andaman Sea on the evolution of pockmarks.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Anastasios Nikitas, Georgios Makrodimitras, Maria V. Triantaphyllou, Nikolaos Pasadakis, Kimon Christanis, Stavros Kalaitzidis, Grigoris Rousakis, Ioannis Panagiotopoulos, Alexandra Gogou, Alexandros Papadopoulos, Efthimios Tartaras, Aristofanis Stefatos
Summary: Due to the lack of deep wells in the broader region, studying mud volcanic deposits can improve the geological understanding of the Mediterranean Ridge. In this study, biostratigraphic and geochemical analyses were performed on mud breccia deposits from five Mud Volcanoes in the central MR. The results indicate the origin of these deposits and provide insights into the source rock potential. Seismic data is also used to determine the distribution of major lithostratigraphic formations.
MARINE AND PETROLEUM GEOLOGY
(2024)