Article
Geosciences, Multidisciplinary
Faiz Ahmad, Mohammad Adnan Quasim, Abul Hasnat Masood Ahmad
Summary: The study on the microfacies and diagenetic processes of the Fort Member limestones in Western Rajasthan suggests that they have high reservoir potential, with various microfacies and diagenetic features indicating deposition and diagenesis in different environments, directly affecting porosity and reservoir quality.
GEOLOGICAL JOURNAL
(2021)
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
Multidisciplinary Sciences
V. S. Parihar, V. K. Meghwal, Abhimanyu Singh, S. L. Nama
Summary: This study focuses on well-preserved Lockeia traces of bivalves from the Early Jurassic to Bajocian Thaiat Member, describing the morphology and distribution of these traces. By analyzing the behavior of ancient bivalves based on the shapes and arrangements of the trace fossils, the researchers suggest a shallow-marine environment for the upper part of the Thaiat Member.
Article
Geology
Shaikh Asjad, K. F. Khan, M. A. Quasim, H. K. Sachan, Aashna Javed
Summary: Microfacies, diagenesis, and stable isotope analysis of the Kuldhar Member Limestone (KML) were conducted to reconstruct its depositional environment and evaluate the impact of diagenesis on reservoir quality. The study revealed that diagenetic processes such as micritization, cementation, and compaction affected the reservoir quality negatively, while dissolution and fracturing had a positive impact.
CARBONATES AND EVAPORITES
(2023)
Article
Environmental Sciences
Mery Biswas, Manash Pratim Gogoi, Bikramaditya Mondal, Thota Sivasankar, Soumyajit Mukherjee, Swagato Dasgupta
Summary: The northwestern part of the Indian plate contains sedimentary basins, such as the Jaisalmer basin, with deposits ranging from the Early Jurassic to the Quaternary period. This area is characterized by active tectonic faults, including the NW-SE trending Kanoi fault and Ramgarh fault with the Mari-Jaisalmer Arch. By analyzing watersheds, micro-scale basins, and spot locations, the tectonically active areas in the basin are identified. The Index of Active Tectonics (IAT) is calculated using the Analytic Hierarchy Process (AHP), and factors such as basin asymmetry, valley floor width to height ratio, and hypsometric curve are considered. The results show that Miajlai depression, located in watershed-4, is the most tectonically active area, and three spots along the NW-trending Mari highland have control over drainage patterns. The hydrocarbon fields are found in the Shahgarh and Miajlar depression zones, which experience moderate and high tectonic activities, respectively.
GEOCARTO INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
Aashna Javed, K. F. Khan, M. A. Quasim
Summary: Detailed investigations were conducted on sandstone samples from the Joyan Member of the Jaisalmer Formation. The sandstones are mainly composed of quartz, metamorphic and sedimentary rock fragments, and subordinate feldspar. The detritus for the sandstones is derived from various sources, including metamorphic, volcanic, and recycled sedimentary rocks. The shift in sediment supply suggests sedimentation in a tectonically active basin.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2023)
Article
Geosciences, Multidisciplinary
Abhimanyu Singh, Vishnu K. Meghwal, Virendra S. Parihar
Summary: This study documents the trace fossils of four bivalves, Ptychoplasma excelsum, Ptychoplasma vagans, Lockeia siliquaria, and Lockeia cunctator, from the Kuldhar Member of the Jaisalmer Formation in the Jaisalmer Basin, western India. The characteristics and arrangement of these trace fossils indicate different activity patterns and provide insights into the depositional environment of the region. This study contributes to a better understanding of the geological history of the Jaisalmer Basin.
JOURNAL OF EARTH SYSTEM SCIENCE
(2023)
Article
Biology
Krishna Kumar, Pragya Pandey, Sunil Bajpai, Debasish Bhattacharya, Bindhyachal Pandey
Summary: This study describes a small vertebrate faunal assemblage of late Middle Eocene age in the Jaisalmer Basin of Rajasthan state, Western India. The assemblage includes representatives of selachians, crocodilians, turtles, and archaeocete cetaceans. The discovery of Eocene cetaceans in the Jaisalmer Basin provides new insights into early whale evolution on the Indian subcontinent.
HISTORICAL BIOLOGY
(2021)
Article
Environmental Sciences
Taskin Ahmed, Abdullah Khan
Summary: Petrographic and petrofacies investigations were conducted on sandstone samples from the Badabagh Member, Jaisalmer Formation in western Rajasthan, India. The sandstone is mainly composed of quartz, metamorphic and sedimentary rock fragments, feldspar, and accessory minerals. The sandstone is dominantly quartz-arenite with a provenance from the Aravalli Delhi Fold Belt and Malani Igneous Suites.
JOURNAL OF SEDIMENTARY ENVIRONMENTS
(2023)
Article
Geosciences, Multidisciplinary
Zhenghong Li, Liqiang Zhang, Wenfang Yuan, Xi Chen, Liang Zhang, Mingqiang Li
Summary: The Ahe Formation in the Kuqa Depression of Tarim Basin is characterized by poor reservoir quality and strong heterogeneities. In this study, "diagenetic facies" are introduced and four types are categorized based on reservoir spaces, diagenetic minerals, and diagenesis. Petrophysical characteristics are summarized, and it is found that dissolution facies and microfracture facies have higher porosities and permeabilities. Principal component analysis (PCA), linear discriminant analysis (LDA), and back propagation neural networks (BPNN) are compared for diagenetic facies identification, with BPNN achieving the highest accuracy. The trained BPNN model is effective for diagenetic facies identification based on conventional well logs.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Biology
Krishna Kumar, Sunil Bajpai, Pragya Pandey, Triparna Ghosh, Debasish Bhattacharya
Summary: Jurassic hybodont sharks of the genus Strophodus are reported for the first time from the Jaisalmer Basin in western India, expanding their distribution in the Jurassic eastern Tethys. The discovery of these sharks, along with other vertebrates and invertebrates, suggests a near-shore marine environment for this new species.
HISTORICAL BIOLOGY
(2022)
Article
Geosciences, Multidisciplinary
V. S. Parihar, S. L. Nama, V. K. Meghwal, C. P. Khichi, S. C. Mathur
Summary: This paper describes the discovery of the well-preserved ichnotaxon complex Hillichnus agrioensis in India, along with associated trace-fossils and their interpretations. The study suggests that the trace-fossil bearing horizons may represent a shallow or marginal-marine environment.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2021)
Article
Geosciences, Multidisciplinary
Ahmad M. AlZoukani, Lameed O. Babalola, John D. Humphrey, Michael A. Kaminski, Khalid A. Al -Ramadan
Summary: Carbonate outcrops of the Jurassic Middle Dhruma Formation in Saudi Arabia were studied to understand the controls on potential reservoir quality. The porosity and permeability of the rocks were found to be influenced by sedimentary facies, post-depositional modification, and diagenesis. The integration of field and laboratory data helped identify the lithofacies types and depositional environments. The study also revealed similarities between the Dhruma Formation in Saudi Arabia and equivalent outcrops and reservoirs in the region in terms of depositional environments, bulk density, and porosity.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Xiuzhang Song, Zhengxiang Lv, Chunyan Zang, Peng Hao, Yinjun He, Wei Zhao, Yuanhua Qing, Jie Ren
Summary: Exploring the impact of volcanic pyroclastic on hydrocarbon-bearing rocks is important. Previous studies have focused on laminated pyroclastic, but there is also a significant amount of dispersed volcanic ash in sandstone reservoirs, which strongly influences their diagenetic evolution. In this study, we investigated the Jurassic tuffaceous sandstone reservoir in Qikou Sag of the Bohai Bay Basin to determine the water-rock interaction mechanism. Our observations revealed two-stage dolomite and calcite cementation, quartz cementation, and clay mineral transformation and dissolution as the main diagenetic processes. The dissolution of pyroclastic during burial provided an alkaline environment and supplied ions for the formation of microcrystalline quartz, early dolomite, and the transformation of clay minerals. Microbial activity stimulated early calcite formation during shallow burial. Acidic fluids generated by thermal evolution of organic matter were neutralized by soluble components in the pyroclastic, preventing the formation of a large-scale acidic environment. Burial temperatures exceeding 100°C resulted in the formation of acidic fluids, causing dissolution of plagioclase and promoting quartz overgrowth and kaolinite growth.
Article
Geosciences, Multidisciplinary
Sebastian Niegel, Matthias Franz
Summary: The Mesozoic succession in the North German Basin contains permeable sandstones that are used for geothermal heat production. The sandstones have high permeability due to undercompacted grain fabrics, low abundance of authigenic minerals, and large secondary porosity volumes. Petrographic methods were used to study the diagenesis of sandstones, and four diagenetic pathways were identified. The knowledge of these pathways will help improve predictions of Mesozoic hydrothermal reservoirs.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Faiz Ahmad, Mohammad Adnan Quasim, Abul Hasnat Masood Ahmad
Summary: The study on the microfacies and diagenetic processes of the Fort Member limestones in Western Rajasthan suggests that they have high reservoir potential, with various microfacies and diagenetic features indicating deposition and diagenesis in different environments, directly affecting porosity and reservoir quality.
GEOLOGICAL JOURNAL
(2021)
Article
Polymer Science
Sami Ullah, Faiz Ahmad, Abdullah G. Al-Sehemi, Mohammed Ali Assiri, Muhammad Rafi Raza, Ahmad Irfan
Summary: The research demonstrates the significant effects of ammonium polyphosphate and expandable graphite on intumescent coating, particularly in terms of residual mass and chemical composition. The residual char after fire test shows good stability and adhesion. Weathering test reveals that the expansion of coating residue is affected by humid environment and UV light.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Faiz Ahmad, Angela Patterson, Jaigeeth Deveryshetty, Jenna R. Mattice, Nilisha Pokhrel, Brian Bothner, Edwin Antony
Summary: RPA binds to ssDNA and interacts with enzymes, acting as a recruitment hub for DNA metabolic processes. Recent evidence suggests that the dynamics of DBDs better define their roles. DBD-C plays a major role in stabilizing RPA on ssDNA.
NUCLEIC ACIDS RESEARCH
(2021)
Review
Materials Science, Textiles
Khurshid Malik, Faiz Ahmad, Ebru Gunister
Summary: This paper reviews the past and present research studies of the drilling behavior of NFRCs and their hybrids, exploring various drilling techniques and parameters, as well as analyzing drill bit geometry and materials. The study highlights methods of improving drilling properties for these composites, including chemical treatment of natural fibers and optimizing drilling performance parameters.
JOURNAL OF NATURAL FIBERS
(2022)
Review
Materials Science, Composites
Khurshid Malik, Faiz Ahmad, Ebru Gunister
Summary: This paper reviews kenaf fiber reinforced thermoset composites (KFTCs) and their hybrids, presenting an overview of their basic components, fabrication techniques, performance, matrix and fiber modifications, as well as application and future potential scope. It provides detailed insights into the mechanical, thermal-physical, water absorption, and durability properties of KFTCs and their hybrids, aiming to serve as a reliable reference for optimizing their performance.
APPLIED COMPOSITE MATERIALS
(2021)
Article
Mathematics, Interdisciplinary Applications
Faiz Ahmad, Takasar Hussain, Muhammad Ozair
Summary: This paper investigates the upper and lower bounds of Rayleigh wave speed in an incompressible orthotropic plate, defining an elastic anisotropy parameter a for all orthotropic materials. Different ranges of a lead to different properties of the Rayleigh wave speed.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Materials Science, Multidisciplinary
Adiat I. Arogundade, Puteri S. M. Megat-Yusoff, Faiz Ahmad, Aamir H. Bhat, Lukmon O. Afolabi
Summary: Valorization of bauxite residue through oxalic acid treatment can enhance its application in intumescent coatings for fire retardant systems. The optimized process results in reduced iron content, increased char expansion and improved endothermic cooling.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Review
Engineering, Manufacturing
Saad Ali, Faiz Ahmad, Puteri Sri Melor Megat Yusoff, Norhamidi Muhamad, Eugenio Onate, Muhammad Rafi Raza, Khurshid Malik
Summary: This review focuses on the enhancement of thermal conductivity of graphene reinforced Cu matrix composites, discussing various factors affecting thermal conductivity and giving special attention to the processing route as the most influential factor. Additionally, graphene-based functional products for heat dissipation of electronic devices are reviewed. The development and outlook for graphene-based Cu composites are also presented.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Geosciences, Multidisciplinary
Sadia Khanam, M. A. Quasim, A. H. M. Ahmad
Summary: The Proterozoic Rajgarh Formation sandstones are texturally immature and compositionally sub-mature, with the reservoir quality strongly influenced by depositional facies and diagenetic modifications. Primary porosity reduction is mainly due to mechanical and chemical compaction in the studied sandstones. Different depositional facies show various diagenetic features such as clay coating, feldspar dissolution, iron-oxide cementation, and pyrite precipitation, impacting both primary and secondary porosity. Depositional environment controls diagenetic pathways and influences reservoir quality, with river-dominated estuary facies considered as potential reservoir rocks.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2021)
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
Geosciences, Multidisciplinary
A. S. A. E. Alsrory, Nabeel A. S. A. Al-Azazi, Mohammed Albaroot, M. A. Quasim
Summary: This study uses one-dimensional basin modelling to examine the hydrocarbon generation and expulsion history of Upper Jurassic source rocks in the Sab'atayn Basin in Yemen. The modelling results reveal significant subsidence and uplift events that have had a notable impact on heat flow distribution and hydrocarbon generation.
GEOLOGICAL JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
M. A. Quasim, Nurul Absar, B. P. Singh, Faiz Ahmad, M. Ashok
Summary: In this study, the major, trace, and rare earth element compositions of the Bijaigarh Shale (BS) were analyzed to infer the composition, weathering history, and tectonic setting of the Mesoproterozoic continental crust. The BS consists of quartz, smectite, kaolinite, and illite, with occasional framboidal pyrites. The high chemical index of alteration (CIA) and plagioclase index of alteration (PIA) values, along with the depletion of certain elements, suggest intense chemical weathering in a warm and humid climate. The REE patterns and immobile element ratios indicate a felsic provenance, with insignificant recycling. The source area is estimated to consist of various granite types and Porcellanite.
JOURNAL OF EARTH SYSTEM SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Aashna Javed, K. F. Khan, M. A. Quasim
Summary: Detailed investigations were conducted on sandstone samples from the Joyan Member of the Jaisalmer Formation. The sandstones are mainly composed of quartz, metamorphic and sedimentary rock fragments, and subordinate feldspar. The detritus for the sandstones is derived from various sources, including metamorphic, volcanic, and recycled sedimentary rocks. The shift in sediment supply suggests sedimentation in a tectonically active basin.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2023)
Article
Geosciences, Multidisciplinary
Mohammad Adnan Quasim, Shaista Khan, Vineet Kumar Srivastava, Asma Amjad Ghaznavi, Abul Hasnat Masood Ahmad
Summary: Thin-section petrography, scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses were used to investigate the diagenetic controls on the reservoir quality of the Ridge and Athleta Sandstone members in the Jara dome, Kachchh Basin, western India. The study found that carbonates, iron oxides, silica overgrowth, and authigenic clays like chlorite and kaolinite are the principal cementing materials in the sandstones. The reservoir quality of the sandstone is influenced by compaction, cementation, dissolution of unstable grains, and the precipitation of carbonate cement and silica overgrowths.
GEOLOGICAL JOURNAL
(2021)