A5038716976- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- earthquake and tectonic studies
- Geological Studies and Exploration
- Geochemistry and Geologic Mapping
- Paleontology and Stratigraphy of Fossils
- Astro and Planetary Science
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Elemental Analysis
- Structural Health Monitoring Techniques
- Vibration and Dynamic Analysis
- Fluid Dynamics Simulations and Interactions
- Geomagnetism and Paleomagnetism Studies
- Marine and environmental studies
- Metal Extraction and Bioleaching
- Matrix Theory and Algorithms
- Geology and Paleoclimatology Research
- Electromagnetic Scattering and Analysis
- Geological formations and processes
- Ship Hydrodynamics and Maneuverability
- Seismic Waves and Analysis
- Minerals Flotation and Separation Techniques
- Recycling and Waste Management Techniques
- Acoustic Wave Phenomena Research
- Dynamics and Control of Mechanical Systems
National Institute of Science Education and Research
2022-2025
Homi Bhabha National Institute
2024-2025
Monash University
2019-2022
Australian Regenerative Medicine Institute
2021
Ruhr University Bochum
2017-2019
Jadavpur University
2013-2015
Newcastle University
1972-1976
Abstract Understanding of secular evolution the Earth system is based largely on rock and mineral archive preserved in continental lithosphere. Based frequency range accessible data this record, we divide into seven phases: (a) “ Proto‐Earth ” (ca. 4.57–4.45 Ga); (b) Primordial 4.45–3.80 (c) Primitive 3.8–3.2 (d) “Juvenile 3.2–2.5 (e) Youthful 2.5–1.8 (f) Middle 1.8–0.8 (g) Contemporary (since ca. 0.8 Ga). Integrating record with knowledge cooling mantle lithospheric rheology constrains...
Abstract Thermomechanical models of mantle convection and melting in an inferred hotter Archean Earth show the emergence pressure-temperature (P-T) regimes that resemble present-day plate tectonic environments yet developed within a non–plate tectonics regime. The models’ P-T gradients are compatible with those from evolving tonalite-trondhjemite-granodiorite series rocks paired metamorphic belt record, supporting feasibility divergent convergent mobilized, laterally continuous, lithospheric...
When and how Earth's earliest continents-the cratons-first emerged above the oceans (i.e., emersion) remain uncertain. Here, we analyze a craton-wide record of Paleo-to-Mesoarchean granitoid magmatism terrestrial to shallow-marine sedimentation preserved in Singhbhum Craton (India) combine results with isostatic modeling examine timing mechanism one episodes large-scale continental emersion on Earth. Detrital zircon U-Pb(-Hf) data constrain Craton, which resolves emersion. Time-integrated...
Abstract The dominant tectonic mode operating on early Earth (before ca. 2.5 Ga) remains elusive, with an increasing body of evidence suggesting that non-plate modes were likely more prevalent at time. Thus, how plate tectonics evolved after contentious. We performed two-dimensional numerical modeling mantle convection temperatures appropriate for the Hadean–Archean eons and show subduction rift systems may have spontaneously emerged from earlier drip-and-rift–dominated in response to...
The emergence of continental crust above sea level influences Earth's surface environments and climate patterns, it creates diverse habitats that promote biodiversity. Earth exhibits bimodal hypsometry with elevated continents a submerged seafloor. However, remains elusive when how this unique feature was first established. geological record suggests the presence subaerial landmasses between ca. 3.8 2.4 billion years ago (Ga), but their spatial extent longevity remain unclear. Further,...
High-pressure metamorphism at relatively low to moderate temperature is considered reflect the presence of plate margin processes. However, evidence such scarce in preserved archive Archean–early Proterozoic rock record. Extant geochronological studies show that parts Southern Granulite Terrain (SGT) India experienced regional from ∼2·49 2·44 Ga and thus provide an excellent natural laboratory study geodynamics was prevalent within first ∼50 Myr Archean–Proterozoic boundary. Here, we have...
Abstract The Southern Granulite Terrane of India exposes remnants an interbanded sequence orthoquartzite–metapelite–calcareous rocks across the enigmatic Palghat–Cauvery Shear Zone (PCSZ), which has been interpreted as a Pan-African terrane boundary representing eastward extension Betsimisaraka Suture Madagascar. Zircon U–Pb geochronology metasedimentary from both sides PCSZ shows that precursor sediments these were sourced Dharwar Craton and adjoining parts Indian shield. similarity...
The Archaean Sittampundi Layered Magmatic Complex (SLC) of south India is interpreted as a part the oceanic crust that formed in suprasubduction zone setting. assemblage corundum + anorthite amphibole (magnesiohornblende to tschermakite pargasite) clinozoisite (C1PACz) developed highly calcic anorthosite SLC at culmination ca. 2.46 Ga tectonothermal event. Changing physicochemical conditions during this early Paleoproterozoic (Siderian) event produced spinel second generation through...
The equations for the free undamped vibration of a structure in an ideal incompressible fluid medium and their finite element formulation are briefly reviewed. relevant matrices (stiffness loading) two prismatic elements given e
Lithospheric yield stress is a key parameter in controlling tectonic processes. Using high resolution, 2D numerical modelling, we calculate the for range of conditions appropriate to early-to-mid Archean Earth, including hotter mantle potential temperatures and Moho temperatures. We then evaluate its effect on generating tonalite-trondhjemite-granodiorite (TTG) crust benchmark results against preserved igneous rock record. Our indicate that lithospheric values lower than present-day (i.e. ≤...
<p>Modeling details, including the initial model setup and additional figures. </p>
<p>Modeling details, including the initial model setup and additional figures. </p>
<p>Modeling details, including the initial model setup and additional figures. </p>
Tectonic mode manifests how a planet&#8217;s interior is cooling, and it encompasses all the geological activities (e.g., magmatism, deformation, metamorphism, sedimentation) that characterize planetary body. processes exert first-order control on factors key to habitability Southam et al., 2015). For example, tectonic controls long-term prevalence of surface oceans, sustenance physicochemical conditions temperature) favourable for metabolic activity, fluxing elements in out thereby,...