Article
Geochemistry & Geophysics
Xiaohan Gong, Liyan Tian, Yanhui Dong
Summary: Investigation of mantle peridotites and gabbros from the southern side of the Parece Vela back-arc basin in the Philippine Sea revealed the impact of different melt percolation and melt-rock reaction processes on the characteristics of mantle rocks.
Article
Materials Science, Ceramics
Srishti Mishra, Snehanshu Pal
Summary: The structural evolution of Al90Sm10 metallic glass nanowire under torsion deformation at different speeds has been investigated using molecular dynamics simulation. It was found that with increasing torsion speed, the generation of shear transformation zones becomes uneven and the width of shear bands is constrained to narrow regions. Furthermore, the improvement of Voronoi polyhedra also enhances plastic deformation.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Geochemistry & Geophysics
Chen Chen, Ben-Xun Su, Christina Yan Wang, Ibrahim Uysal, Zhuo-Sen Yao
Summary: Many ophiolites in southern Neo-Tethys exhibit diverse lithologic sequences, with varying geochemical compositions in their dikes and lavas. This study on the Kizildag ophiolite in southern Turkey suggests that the compositional variations are likely linked to mantle melting processes, involving polybaric continuous melting and flux-melting for the sheeted dikes, and batch crystallization of boninitic melts for the gabbros. The involvement of slab-derived melts/fluids in a protoarc-forearc setting is also evident in the studied samples.
Article
Geology
Yuki Mori, Kazuhiro Miyazaki, Takeshi Ikeda, Tomoharu Miyamoto, Hideki Iwano, Tohru Danhara, Takafumi Hirata
Summary: The study presents evidence of Early Cretaceous partial melting in the Nagasaki Metamorphic Complex in western Kyushu, Japan, suggesting the initiation of long-lived high-T metamorphism at the eastern margin of Eurasia. Geochemical data indicates distinct partial melting occurred during metamorphism at lower crustal depths. The U-Pb ages of metamorphic zircon rims suggest a significant duration of high-T conditions and align with a magmatic hiatus period in southwest Japan and Korean Peninsula.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Materials Science, Multidisciplinary
M. W. Kapp, O. Renk, J. Eckert, R. Pippan
Summary: In-situ microbending experiments were conducted to investigate the effect of composite architecture on the deformation behavior and ductility of heavily cold-worked pearlitic steels. The results showed that nanostructures exhibited astonishing homogeneous deformation capability, with plastic strains of up to 20%. This exceptional ductility seemed to be related to the inherent strain gradient of the bending beams, and the architecture of the pearlitic steels played a predominant role in determining the ductility.
Article
Computer Science, Interdisciplinary Applications
Ri-hong Cao, Rubing Yao, Hang Lin, Qi-bin Lin, Qingbing Meng, Tianbin Li
Summary: This paper investigates the shear failure behavior of 3D nonpersistent jointed rock masses through laboratory tests and numerical simulations. The results show that the shear strength, cohesion, and friction angle decrease with increasing joint persistence. A 3D DEM model with nonpersistent joints is established and the numerical results are consistent with the laboratory results. The crack initiation, propagation, and coalescence on the joint specimens are analyzed at the microscale.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Geochemistry & Geophysics
Alexey Kotov, Sergey Smirnov, Ildar Nizametdinov, Masaoki Uno, Noriyoshi Tsuchiya, Ivan Maksimovich
Summary: This study aimed to establish the origin and storage conditions of magma preceding the Pleistocene caldera eruption of Mendeleev volcano. Results indicate that the partial melting of amphibole-bearing substrates in island arcs may serve as a universal mechanism for the generation of silicic magmas during powerful caldera eruptions in young island arcs. The increasing heat flow in the supra-subduction mantle generated an active mafic intrusion into the upper crust, leading to intense heating and partial melting of upper-crustal rocks.
JOURNAL OF PETROLOGY
(2023)
Article
Geology
X. Y. Ma, Q. Liu, F. C. Yan, M. He, H. Y. Zhang
Summary: The study suggests that the serpentinized peridotites in Haiyangsuo are remnants of mantle peridotite that have undergone low to moderate partial melting and melt/fluid metasomatism. The pyroxenites in Haiyangsuo experienced intensive fractional crystallization. Due to the development of deep level ductile shear zones, olivine and pyroxene in the ultramafic rocks exhibit ductile deformation characteristics. There is no genetic relationship between the peridotites and pyroxenites, with the former possibly belonging to oceanic core complexes (OCC).
ACTA PETROLOGICA SINICA
(2021)
Review
Geochemistry & Geophysics
Nathan R. Daczko, Sandra Piazolo
Summary: This study focuses on the characteristics of melt-migration pathways in high-strain zones cutting through sub-solidus rocks, emphasizing the importance of assessing these features on a case-by-case basis and providing a list of distinguishing features between solid-state and melt-present deformation.
Article
Geochemistry & Geophysics
E. M. Conrad, N. Tisato, B. M. Carpenter, G. Di Toro
Summary: This study investigates the effects of frictional melt formation on the coseismic and interseismic strength of faults using a new energy-controlled rotary shear machine. The experiments reveal that the presence of melts modulates different stages of earthquakes and faulting. Monitoring acoustic emissions and vibrational waves during slip events can provide valuable insights into the underlying physical processes and help improve our understanding of earthquakes.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Materials Science, Multidisciplinary
B. Bishoyi, R. K. Sabat, S. Suwas, S. K. Sahoo
Summary: The study found that the deformation temperature and shear strain have a significant impact on the microstructure and texture evolution of commercially pure titanium, with deformation twinning and bands observed at lower temperatures and primarily basal slip and dynamic recrystallization observed at higher temperatures.
PHILOSOPHICAL MAGAZINE
(2021)
Article
Engineering, Civil
Yuhan Liang, Zongping Chen, Xiang Liu, Haoyu Liao
Summary: The seismic behavior of RC cross-shaped columns under combined loading conditions was studied through experiment and numerical simulation. The effects of torsion-bending ratio and axial compression ratio on the seismic indexes were investigated. Experimental results showed that the T/M ratio determines the failure modes of the columns. The columns exhibited good ductility and deformation capacity under torsion loading. Based on the experimental results, hysteretic models and finite element simulation were proposed and validated.
Article
Computer Science, Interdisciplinary Applications
Yongsheng Yao, Jue Li, Junjun Ni, Chenghao Liang, Anshun Zhang
Summary: The study found that gravel shape has a greater impact on the shear strength of soil-rock mixture (SRM) than gravel content, and the discrete element method can accurately predict the mechanical properties and deformation behavior of the material. As gravel content increases, the contribution of contact force within gravel particles increases, and the interlocking work has a nonlinear positive correlation with the increase of sphericity.
COMPUTERS AND GEOTECHNICS
(2022)
Review
Geosciences, Multidisciplinary
Jiahao Li, Xing Ding, Junfeng Liu
Summary: This paper reviews the processes of partial melting of crustal rocks, both with and without fluid assistance, and summarizes the role of fluids and volatiles in the formation of granitic melts. It is found that water (H2O) plays a crucial role in lowering the solidus temperature of rocks and facilitating partial melting, affecting the melting reaction process and the composition of melt, and helping the formation of large-scale magma chambers. Volatiles and salts dissolved in crustal fluids can also lower the solidus temperature of rocks and affect the partitioning of trace elements, facilitating the formation of distinctive granitoids. In-depth studies on fluid-assisted partial melting of crustal rocks will contribute to a better understanding of the melting of the Earth's crust, and provide theoretical constraints on the genesis and mineralization of granitoids as well as the formation and evolution of the continental crust.
Article
Materials Science, Paper & Wood
M. Dauer, A. Wolfbauer, T. Seidlhofer, U. Hirn
Summary: The study presented a method to measure the shear modulus of pulp fibers using a custom-built instrument, deriving shear moduli for two types of industrial pulp fibers. The results showed differences in shear modulus and torsional rigidity between the thermomechanical pulp (TMP) and Kraft pulp fibers.
Article
Geosciences, Multidisciplinary
Nicholas J. R. Hunter, R. F. Weinberg, C. J. L. Wilson, V Luzin, S. Misra
JOURNAL OF STRUCTURAL GEOLOGY
(2019)
Article
Geosciences, Multidisciplinary
Kamal Nanda, T. K. Vaishakh, Arghya Das, Santanu Misra
JOURNAL OF STRUCTURAL GEOLOGY
(2020)
Article
Geochemistry & Geophysics
Giridas Maiti, Nibir Mandal, Santanu Misra
Article
Green & Sustainable Science & Technology
Manab Mukherjee, Santanu Misra, Elangovan Raja
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2020)
Article
Geosciences, Multidisciplinary
Saquib Abdullah, Santanu Misra, R. Sarvesha, Biswajit Ghosh
JOURNAL OF STRUCTURAL GEOLOGY
(2020)
Article
Energy & Fuels
Manab Mukherjee, Santanu Misra, Anshul Gupta
Summary: The study demonstrates the significant influence of temperature on the adsorption volume and rate of CO2, while the different depths of coal samples result in variations in adsorption characteristics. The experimental data obtained can help us better understand the adsorption and diffusion behavior of CO2 in coal.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Manab Mukherjee, Abinash Bal, Santanu Misra
Summary: This study evaluated the permeability and pore characteristics of coal samples from different mines in the Gondwana coalfield of India, showing that an increase in pore volume and interconnected porosity leads to a decrease in the Klinkenberg coefficient and an increase in intrinsic permeability. The results suggest that the evolution of gas permeability due to slippage effect is strongly influenced by the pore characteristics of the reservoir.
Editorial Material
Geology
Gultekin Topuz, Hossein Azizi, Jean-Pierre Burg
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
Dripta Dutta, Santanu Misra, David Mainprice
Summary: The experimental shearing of a quartz-muscovite aggregate produced various new minerals, with quartz grains becoming finer and muscovite largely consumed. As shear strain increased, the fractions of melt and crystals decreased and increased, respectively, with K-feldspar nucleating first followed by cordierite and mullite. The deformation of both initial and new minerals was dominated by melt-assisted grain boundary sliding, as evidenced by higher misorientations between adjacent grains of quartz, K-feldspar, and ilmenite.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Dripta Dutta, Santanu Misra, Shreya Karmakar
Summary: We studied the deformation of three samples of Banded Iron Formation (BIF) rocks from Southern Granulite Terrane (SGT) of India. The microstructures and textures of quartz, magnetite, and hematite were examined. It was found that the samples deformed to different intensities and temperatures, with dislocation creep as the dominant mechanism. Subgrain boundaries and twinning in magnetite indicated ductile deformation below 400 degrees C. Topotaxial replacement of magnetite by hematite was observed. Recovery processes were rapid in both magnetite and hematite grains. Post-replacement deformation did not affect the inherited hematite texture.
JOURNAL OF STRUCTURAL GEOLOGY
(2022)
Article
Geology
Ali Mohammadi, Jean-Pierre Burg, Jonas B. Ruh, Silvia Spezzaferri
Summary: The N-S trending Sistan Suture Zone in East Iran is formed by the collision of the Lut and Afghan continental blocks. The southern Sistan Basin contains Eocene deep-marine turbiditic sequences with carbonate olistoliths, debris-flow sheets, and calcareous turbidites. These carbonates are fragments of early to middle Eocene carbonate platforms that were redeposited in a deep-marine environment. The presence of volcanic debris in the limestone and surrounding turbidites suggests an active magmatic margin on the Afghan side, potentially triggered by the closure of the Sistan Basin and continental collisions in the late middle Eocene.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Amaneh Kaveh-Firouz, Jean-Pierre Burg, Negar Haghipour, Sanjay Kumar Mandal, Marcus Christl, Ali Mohammadi
Summary: The study focuses on the tectonic and climatic controls on landscape evolution in the NNW Iranian Plateau and west Alborz region. By analyzing erosion rates and topographic/climatic metrics, the researchers found that erosion rates were low in the Plateau and relatively high in the west Alborz, with sediment fluxes controlled by topographic parameters and surface uplift and active thrust-faulting in the respective regions. Climate had a secondary role in erosion rates. Exhumation rates were also calculated and showed an increase during the collision between Arabia and Eurasia. The study highlights the importance of understanding the interplay between tectonic and climatic factors in shaping landscapes.
Article
Geosciences, Multidisciplinary
Gaurav Kumar Mathur, Vikram Maji, Santanu Misra, Gaurav Tiwari
Summary: This study investigated the effects of displacement rates on the strength and mechanisms of fracturing in soft-porous rocks. Compressive experiments were conducted on synthetic samples with different joint configurations and displacement rates. The results showed that the material strength increased with increasing displacement rates for samples with limited persistent ratio, but declined for samples with higher persistent ratio. Tensile wing cracks dominated the fractures, but shearing mechanisms became more prominent at faster displacement rates and higher persistent ratio.
JOURNAL OF EARTH SYSTEM SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Beno J. Jacob, Santanu Misra, Venkitanarayanan Parameswaran, Nibir Mandal
JOURNAL OF STRUCTURAL GEOLOGY
(2020)
Article
Geochemistry & Geophysics
A. Mikolaichuk, Z. A. Kalmetyeva, J-P Burg, D. Fossati, D. Gordeev
GEODYNAMICS & TECTONOPHYSICS
(2020)