A5063511168- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- High-pressure geophysics and materials
- Seismic Waves and Analysis
- Heavy metals in environment
- Geology and Paleoclimatology Research
- Geological formations and processes
- Seismic Imaging and Inversion Techniques
- Groundwater and Isotope Geochemistry
- Geochemistry and Elemental Analysis
- Landslides and related hazards
- Seismic Performance and Analysis
- Seismology and Earthquake Studies
- Geological Studies and Exploration
- Water Quality and Pollution Assessment
- Structural Health Monitoring Techniques
- Heavy Metal Exposure and Toxicity
- Earthquake Detection and Analysis
- Arsenic contamination and mitigation
- Clay minerals and soil interactions
- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Botany and Geology in Latin America and Caribbean
- Rock Mechanics and Modeling
Indian Institute of Technology Roorkee
2015-2025
Visvesvaraya National Institute of Technology
2024
Thapar Institute of Engineering & Technology
2022
Indian Institute of Science Education and Research Kolkata
2022
National Taiwan University
2015
Indian Institute of Technology Indore
2007
The University of Western Australia
2002
Kurukshetra University
2001
Saint Louis University
1980-1983
University of Ottawa
1971-1972
Research Article| March 01, 2009 Detrital-zircon fission-track ages from the Lower Cenozoic sediments, NW Himalayan foreland basin: Clues for exhumation and denudation of Himalaya during India-Asia collision A.K. Jain; Jain † 1Department Earth Sciences, Indian Institute Technology Roorkee, Roorkee 247 667, India †E-mail: himalfes@iitr.ernet.in Search other works by this author on: GSW Google Scholar Nand Lal; Lal 2Department Geophysics, Kurukshetra University, 136 119, B. Sulemani; Sulemani...
ABSTRACT The development of LA‐ICPMS and LA‐MC‐ICPMS resulted in analytical methods for zircon geochronology using a 20‐ to 60‐μm laser spot size. A high amount complexly zoned zircons promotes the requirement U–Pb dating at smaller sizes. When size reduces, downhole fractionation (DHF) increases, increasing DHF discrepancy between grains primary reference standard resulting inaccurate results. With MC‐ICPMS's sensitivity multi‐collector capabilities, this work attempts accurately determine...
The Higher Himalayan Crystallines (HHC), in western Garhwal, Uttarakhand are located a regional-scale intracontinental ductile shear zone (15–20 km wide) bounded by the Main Central Thrust at base, and South Tibetan Detachment System top. migmatite centre has highest grade of metamorphism NW Himalayas show evidence flowage. Zircons extracted from samples metasediment, migmatite, biotite granite situ partial melt (tourmaline-bearing leucogranite) along Bhagirathi Valley, preserve U–Pb...
Abstract Large-scale nappes of the deformed Higher Himalayan Crystallines (HHC) were thrust southward over Lesser Proterozoic foreland during Late Cenozoic. Critical evaluation shear fabrics, reveals that HHC underwent an earlier phase ductile shearing with top-to-southwest overthrust-type sense movement. On which was superposed layer-parallel NE-trending extension. As a consequence, Zanskar Shear Zone (ZSZ) along northern boundary is re-interpreted as complex zone initial thrusting followed...
Ultrahigh-pressure (UHP) rocks in the northwest Himalaya are some of youngest on earth, and allow testing critical questions UHP metamorphism exhumation India-Asia collision. The Tso Morari Complex (TMC) is a subduction-zone complex eastern Ladakh western Himalaya, south Indus-Yarlung suture zone. U-Pb SHRIMP dating zircon shows TMC has Proterozoic protolith, preserves Pan-African magmatic history, continuous metamorphic growth during Early to Middle Eocene, hence constraining timing...
Abstract The basal parts of the Higher Himalayan Crystallines (HHC), Lesser sedimentary sequences and mylonite zone at base Main Central Thrust (MCT) within NW Himalaya clearly demonstrate anorogenic magmatic signatures around 1860 Ma, as indicated by SHRIMP U–Pb zircon ages from Bandal granitoids, Kulu–Bajura Wangtu granitoids along Sutlej Valley, Himachal Pradesh. Some crystals contain older cores mostly extending back to 2600 Ma. We report for first time a 3000 Ma old core which indicates...
Migmatites and partial melts are exposed in both the lower upper package of Higher Himalayan Crystallines (HHC) thrust sheet within Sikkim Himalayas. Zircon monazite quartz oxygen isotopic ratios from Yumthang Valley, North Sikkim, Rathong Chuu, West have been used to identify their sources equilibrium conditions. Monazites show homogeneous growth, whereas zircons growth rings. U-Th-Pb data on only indicate latest metamorphic event. However, rim between 36 24 Ma over detrital core with...
Available ages from Himalayan domain indicate thatHimalaya has experienced different episodes of magmatism starting Paleoproterozoic, Neoproterozoic, Cambro-Ordovician, Permian through Cenozoic.The Indian and Eurasian Plates together document the Cretaceous Cenozoic events after collision.The identified age peaks can be correlated with amalgamation breakup supercontinent cycles Columbia/Nuna (Paleoproterozoic), Rodinia (Neoproterozoic), Gondwanian (Cambro-Ordovician), Pangaea (Permian)...
U-Pb SHRIMP and LA-MC-ICP-MS zircon dates from Dalhousie Dhauladhar granite yield weighted mean ages of 900 to 700 Ma for magmatic cores. The rim has an age 460 age, representing the time reworking early Neoproterozoic bodies during Cambro-Ordovician time. plutons are composed granite, monzogranite, granodioritic having a peraluminous character with pronounced Eu anomaly. Higher Rb content Rb/Sr ratio along REE enrichment in show that body is more evolved than granite. New data areas suggest...