Article
Geosciences, Multidisciplinary
Emilio Saccani, Morteza Delavari, Asghar Dolati, Luca Pandolfi, Edoardo Barbero, Renzo Tassinari, Michele Marroni
Summary: The North Makran Domain in the Makran Accretionary Prism is composed of a stack of different rock units, with the Deyader Complex being an important metamorphic unit. These rocks exhibit different geochemical characteristics, indicating formation in different tectonic settings and magmatic activities.
JOURNAL OF ASIAN EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
Guo Cheng, William D. Barnhart, Shaoyang Li
Summary: This study uses InSAR time-series data to investigate the non-linear viscoelastic deformation of the Makran accretionary prism in southeast Pakistan. The results show that the prism exhibits elastic thinness and the non-linear viscoelastic relaxation of the deep portions can explain the post-seismic surface deformation. The presence of power-law rheology within the lower wedge impacts the estimated plate coupling and the stress state in the subduction system.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
Jing Liao, Xinxin Liu, Qingfang Zhao, Jianming Gong, Weihan Yin, Sen Li, Baohua Lei, Jie Liang, Khalid Muhammad, Waseem Haider Syed
Summary: In this study, seismic data interpretation and impedance inversion were conducted to delineate the spatial distribution of high saturation gas hydrate reservoirs in the low-angle subduction areas of the Makran Accretionary Prism. The characteristics of high saturation gas hydrate reservoirs in the Nankai Trough in Japan and the Shenhu Area in the South China Sea were comprehensively analyzed. The results provide useful information for the exploration and development of gas hydrate in this area.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Edoardo Barbero, Federica Zaccarini, Morteza Delavari, Asghar Dolati, Emilio Saccani, Michele Marroni, Luca Pandolfi
Summary: The Durkan Complex in the Makran Accretionary Prism can be distinguished into two main rock groups based on whole rock and clinopyroxene chemical data, with one group showing transitional affinity and the other displaying within-plate oceanic island basalt compositions. These alkaline rocks were likely formed from the partial melting of a depleted sub-oceanic mantle source metasomatized by OIB-type chemical components in a within-plate oceanic setting, possibly related to a Late Cretaceous mantle plume activity.
Article
Geosciences, Multidisciplinary
Jian-ming Gong, Jing Liao, Yu-xi Zhang, Jie Liang, Jian-wen Chen, Nuzhat Khan, Syed Waseem Haider
Summary: This study accurately identifies the characteristics of natural gas hydrates (NGH) in the sea area of the Makran Accretionary Prism, Pakistan, through testing and analysis of major and trace elements in sediment samples. The research reveals the tectonic setting and provenance features of the area, indicating that the sediments are rich in organic matter, favorable for the formation of NGH.
Article
Geosciences, Multidisciplinary
Xiaoran Lv, Falk Amelung, Yun Shao
Summary: InSAR time series data analysis reveals up to 20 cm of radar line-of-sight displacements in the area of the 2013 Mw 7.7 Balochistan earthquake in southwest Pakistan. This surface displacement is caused by a 5,500-km(2)-wide subhorizontal patch of the megathrust fault exhibiting about 80 cm of aseismic slip. The triggered aseismic slip suggests that this section of the megathrust is decoupled, and the seismic potential of the subduction zone is fully locked up to a distance of 220 km from the trench.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Mai-Linh Doan, Jade Dutilleul, Pierre Henry
Summary: Using logging data and samples from expeditions, we determined porosity and sonic velocity profiles in the Nankai margin. The decrease in porosity with depth suggests hydrostatic conditions in the borehole. We improved the velocity-porosity relationship and predicted velocity profiles at Site C0002.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Mohammad Enayat, Abdolreza Ghods
Summary: The internal structure of the Makran subduction zone, the crustal nature of the Jaz Murian Depression, and the trend of the subducting plate hinge have been investigated. The results suggest that the observed volcanic arc might be related to the subducting plate hinge rather than the reduction of the subduction angle.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Keith Priestley, Farhad Sobouti, Rahil Mokhtarzadeh, Mohsen A. Irandoust, Reza Ghods, Khalil Motaghi, Tak Ho
Summary: The Makran Subduction Zone is a major seismic/tsunami hazard in the northwestern Indian Ocean, but little is known about its on-shore seismic structure. This study provides insights into the structure of the coastal region, including the sedimentary cover, gradient zone, and upper mantle. The seismic signature of the Moho disrupts in the forearc region, where the subducting oceanic plate steepens. The continental crust and sub-Moho mantle have specific velocity structures in the southern Iranian Plateau. The absence of a crustal root beneath the volcanic belt is compensated by low upper mantle densities.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
S. Aretusini, S. Mittempergher, F. Remitti, R. Arletti, M. Polisi, N. De Paola, T. Tesei
Summary: This study investigates the effect of rock fabric on the mechanical properties of scaly clays and finds that the behavior of these clays depends on temperature and pressure conditions. Under high pressure and temperature, the clays exhibit lower strength, while under low pressure and temperature, they show higher strength. This research highlights the importance of considering rock fabric when studying the mechanical behavior of scaly clays in subduction zones.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geosciences, Multidisciplinary
M. Foschi, G. Etiope, J. A. Cartwright
Summary: Large microbial gas hydrate deposits in the Rakhine Basin, Bay of Bengal, are found to have migrated from a deeper petroleum system and play a significant role in the gas system. The detection of active free-phase gas migration towards the shallow gas hydrate stability zone indicates the potential environmental impact. These findings are crucial for understanding the origin and behavior of submarine methane-rich gas hydrates.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Sepideh Pajang, Nadaya Cubas, Jean Letouzey, Laetitia Le Pourhiet, Seyedmohsen Seyedali, Marc Fournier, Philippe Agard, Mohammad Mahdi Khatib, Mahmoudreza Heyhat, Mohammad Mokhtari
Summary: The study reveals the largely unconstrained seismic potential in the Western Makran region through mechanical modeling and structural mapping analysis. The area is influenced by multiple active fault zones, with higher seismic risk particularly in the eastern domain.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
David Lubo-Robles, Heather Bedle, Kurt J. Marfurt, Matthew J. Pranter
Summary: Mapping the lateral distribution and thickness of gas hydrates and associated free gas using seismic surveys is challenging. In this study, principal component analysis (PCA) was applied to select seismic attributes for self-organizing maps (SOM) to identify BSRs. Using a smaller subset of samples representing target seismic facies offers optimal BSR identification.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Nele Behrendt, Walter Menapace, Gerhard Bohrmann, Matthias Zabel, Achim J. Kopf
Summary: This study presents the pore water data of mud volcanoes in the Mediterranean Sea, revealing strong depletion of certain substances and striking water isotope ratios. The findings provide new insights into the deep origins of these mud volcanoes.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Edoardo Barbero, Luca Pandolfi, Morteza Delavari, Asghar Dolati, Emilio Saccani, Rita Catanzariti, Valeria Luciani, Marco Chiari, Michele Marroni
Summary: The western Durkan Complex consists of distinct tectonic slices showing both non-metamorphic and very low-grade metamorphic deformed successions, indicating different types of successions within the complex.
GEOSCIENCE FRONTIERS
(2021)
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)
