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Lal, Nand

Tectonic Uplift of the Nellore Mica Belt, India, as Revealed by Fission Track Dating Technique

Late Cenozoic - Quaternary Thermo-Tectonic History of Wigher Himalayan Crystalline (HHC) in Kishtwar- Padar-Zanskar region, NW Himalaya: Evidence from Fission Track Ages

Abstract Views :233 | PDF Views:6

Authors

Ashok Kumar ¹, Nand Lal ², A. K. Jain ³, R. B. Sorkhabi ⁴

Affiliations
1 Department of Physics, Kurushetra University, Kurukshetra - 132 119, IN
2 Department of Geophysics, Kurukshetrauniversity, Kurukshetra - 132 119, IN
3 Department of Earth Sciences, University of Roorkee, Roorkee - 247 667, IN
4 Department of Geology, ArizonaState University, Tempe, Arizona 85287-1404, US

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 45, No 4 (1995), Pagination: 375-391

Abstract

Fission Track (m) ages of apatite and zircon from the Higher Himalayan Crystalline (HHC), SE - Jammu and Kashmiralong Chenab-Suru-Dodarivers and their tributaries provide constraints on the cooling (<250°C) and exhumation history of these rocks. FT ages of apatite/zircon versus the topographic elevations of the host samples from different traverses provide linear relationships, indicating differential and secular nature of exhumation in the Himalaya. The HHC belt is exhumedat a rate of about 0.27 mm/a during Middle to Late Miocene. However, regional exhumation rate near the base along the Main Central Thrust and in central parts of the HHC from FT apatite ages is faster upto 0.35 mm/a since Late Miocene. Exhumation has considerably slowed down to 0.11 mm/a along its northern boundary and 0.02 mm/a along the Zanskar Shear Zone. No apparent faster exhurnationis discernible either along thee MCT or the Zanskar ShearZone (ZSZ). On the other hand, three large fold structures namely the Suru Dome, the Chisoti Dome and the Kishtwaranti formal window have indicated very young and fast exhumation of 0.33 mm/a, 1.1 mm/a and 3.6 mm/a respectively during the last 1 to 5 Ma.

Keywords

Fission Track Ages, Geochronology, Crystallines, NW Himalaya.

Full Text

Geology, Structural and Exhumation History of the Higher Himalayan Crystallines in Kumaon Himalaya, India

Abstract Views :163 | PDF Views:0

Authors

R. C. Patel ¹, Vikas Adlakha ¹, Paramjeet Singh ¹, Yogesh Kumar ², Nand Lal ¹

Affiliations
1 Department of Geophysics, Kurukshetra University, Kurukshetra - 136 119, IN
2 RITES, New Delhi, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 77, No 1 (2011), Pagination: 47-72

Abstract

The crystallines in the Kumaon Himalaya, India are studied along Goriganga, Darma and Kaliganga valleys and found to be composed of two high-grade metamorphic gneiss sheets i.e. the Higher Himalayan Crystalline (HHC) and Lesser Himalayan Crystalline (LHC) zones. These were tectonically extruded as a consequence of the southward directed propagation of crustal deformation in the Indian plate margin. The HHC and its cover rocks i.e. the Tethyan Sedimentary Zone (TSZ) are exposed through tectonic zones within the hinterland of Kumaon Himalaya. The HHC records history of at least one episode of pre-Himalayan deformation (D₁), three episodes of Himalayan deformation (D₂, D₃, D₄). The rocks of the HHC in Kumaon Himalaya are thoroughly transposed by D₂ deformation into NW-SE trending S_m (S₁+S₂). The extent of transposition and a well-developed NE-plunging L₂ lineation indicate intense strain during D₂ throughout the studied portion of the HHC. Ductile flow continued, resulting in rotation of F₁ and F₂ folds due NE-direction and NW-SE plunging F₃ folds within the HHC. The over thickened crystalline was finally, superimposed by late-to-post collisional brittle-ductile deformation (D₄) and exposed the rocks to rapid erosion.

Apatite Fission Track (AFT) and Zircon Fission Track (ZFT) studies from the Kumaon Himalaya suggest reactivation of the Main Central/Munsiari Thrust (MCT/MT) and Vaikrita Thrust (VT), rapid exhumation and a system that has been in topographic and exhumation steady-state since at least ₄ Ma.

Keywords

Higher Himalayan Crystallines, Deformation, Exhumation, Kumaon Himalaya.

Full Text

Lecture on 'Global Warming - Most Challenging Issue of Today's World'

In Silico Drug Designing for Jaundice

Abstract Views :144 | PDF Views:2

Authors

Varsha Rani ¹, Nand Lal ²

Affiliations
1 Department of Biotechnology, College of Horticulture and Forestry Neri, Hamirpur, Himachal Pradesh, IN
2 Department of Chemistry, Govt Degree College, Hamirpur, Himachal Pradesh, IN

Source

Research Journal of Science and Technology, Vol 9, No 1 (2017), Pagination: 155-159

Abstract

Jaundice is a yellowing tinge to the skin, sclerae of eyes and body fluids. Jaundice is caused by increased level of bilirubin in the blood, a yellowish pigment, produced from the breakdown of heme, mostly from hemoglobin and red blood cells (RBCs). Protein responsible for causing jaundice is MRP2 (multiple resistance protein2). MRP2 is responsible for increasing the amount of bilirubin in blood. MRP2 amino acid sequence was retrieved from NCBI and 3D structure was modelled using Modeller software. 3D structure of MRP2 was further validated by Ramachandran plot. A drug named, 8-amido-dodec-4-ene was designed by in silico approach for Jaundice. MRP2 protein binds with drug 8-amido-dodec-4-ene effectively showing, Gibbs Binding Energy of -9.59KJ/mol. 8-amido-dodec-4-ene drug showed 0.09 drug likeness score and was found to be nonmutagenic, nonirritant, nontumerogenic and nonreproductive which means that this lead (8-amido-dodec-4-ene) molecule can be a better drug for jaundice after clinical trials. In silico studies are based upon the online tools and softwares which are designed by using different numerical and computational algorithms using Mathematics, so Mathematics plays a very important role in software development.

Full Text

Early–Middle Eocene Exhumation of the Trans-Himalayan Ladakh Batholith, and the India–Asia Convergence

Abstract Views :241 | PDF Views:72

Authors

Rajeev Kumar ¹, A. K. Jain ², Nand Lal ³, Sandeep Singh ¹

Affiliations
1 Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247 667, IN
2 CSIR-Central Building Research Institute, Roorkee 247 667, IN
3 Sri Sri University, Cuttack 754 006, IN

Source

Current Science, Vol 113, No 06 (2017), Pagination: 1090-1098

Abstract

Very fast Early–Middle Eocene exhumation of theTrans-Himalayan Ladakh Batholith (LB) is revealedby new Rb–Sr biotite and zircon fission-track agesalong with the already published ages on these minerals.Exhumation peaked at 3.5 ± 0.9 mm/a between50–45 Ma (⁴⁰Ar/³⁹Ar hornblende ages) and 48–45 Ma(Rb–Sr biotite ages) as a consequence of the India–Asia convergence. It was followed by deceleration at arate of 1.2 ± 0.2 mm/a until 43–42 Ma (zircon FT ages),like the Deosai batholith in the west. Exhumationrates finally decreased during Oligocene to a minimumof ~0.1 mm/a before a mild late Miocene–Holocene acceleration. Lower-Middle Eocene exhumationof the LB was tectonically controlled by slabbreak-off of the Neo-Tethys oceanic lithosphere and underthrusting of the Himalayan Metamorphic Belt.

Keywords

Early–Middle Eocene Exhumation, Fission Track, Ladakh Batholith, Tectonics.

Full Text

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Lal, Nand

Tectonic Uplift of the Nellore Mica Belt, India, as Revealed by Fission Track Dating Technique

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Abstract

Full Text

Late Cenozoic - Quaternary Thermo-Tectonic History of Wigher Himalayan Crystalline (HHC) in Kishtwar- Padar-Zanskar region, NW Himalaya: Evidence from Fission Track Ages

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Geology, Structural and Exhumation History of the Higher Himalayan Crystallines in Kumaon Himalaya, India

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Lecture on 'Global Warming - Most Challenging Issue of Today's World'

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In Silico Drug Designing for Jaundice

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Early–Middle Eocene Exhumation of the Trans-Himalayan Ladakh Batholith, and the India–Asia Convergence

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References

Polynomial Compactness of Derivations

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Composition Operators on l2 of The form “Normal Plus Compact"

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Composition Operators on l² of The form “Normal Plus Compact"