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Karmakar, Subrata
- Structural Architecture of the Vindhyan Strata in Son Valley: Implications for Basin Tectonics
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Authors
Affiliations
1 Department of Geology, J.K. College, Purulia, West Bengal, IN
1 Department of Geology, J.K. College, Purulia, West Bengal, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 51, No 3 (1998), Pagination: 377-382Abstract
Detailed field studies on the regional structure of the Vindhyan strata in Son valley reveal that the Vindhyan strata define a broad syncline with a gently plunging (westerly), mildly curved fold axis (average trend ENE-WSW) and a southerly inclined axial plane. The southern limb of the broad syncline shows several smaller folds which are conspicuously absent in the gently dipping, homoclinal, northern limb. The mesoscopic folds also conform to the regional structural pattern. Progressive deformation of horizontal strata under asymmetric compression associated with a vertical shear displacement has been simulated with the help of a computer software. The computer-generated structural pattern is remarkably similar to the pattern revealed from field studies indicating that the structural pattern of the Vindhyan strata is the consequence of asymmetric compression with the northerly directed force far exceeding the magnitude of the southerly directed force.
Absence of any northerly directed compressional movement in the Indian peninsula in post-Vindhyan period suggests that the deformation of the Vindhyan had been syn-Vindhyan, perhaps associated with the Satpura orogeny. This leads to the deduction that the origin and evolution of the Vindhyan basin was related to flexural subsidence associated with repeated thrust loading in the south.
Keywords
Structural Geology, Basin Tectonics, Son Valley, Vindhyan Basin, Central India.
- Dolomitic carbonatite from the Chotanagpur Granite Gneiss Complex:A New DARC (Deformed Alkaline Rocks and Carbonatite) in the Precambrian shield of India
Abstract Views :278 |
PDF Views:79
Authors
Satabdi Das
1,
Nandini Dasgupta
1,
Sanjoy Sanyal
1,
Shyamal Sengupta
1,
Subrata Karmakar
1,
Pulak Sengupta
1
Affiliations
1 Department of Geological Sciences, Jadavpur University, Kolkata-700 032, IN
1 Department of Geological Sciences, Jadavpur University, Kolkata-700 032, IN
Source
Current Science, Vol 113, No 06 (2017), Pagination: 1038-1040Abstract
The Chotanagpur Granite Gneiss Complex (CGGC) of the East Indian Shield records a protracted geological history ranging from Palaeo- to Meso- to Neoproterozoic time. It is commonly believed that the whole of the CGGC behaved as a unified crustal block at least from 1600 Ma (ref. 3). The E-W to ENE-WSW trending North Purulia Shear Zone (NPSZ) dissects and geographically divides the CGGC into the northern and southern blocks.Full Text
References
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- Evaluation of Partial Discharge Aged Transformer Oil using Optical Spectroscopy Techniques
Abstract Views :217 |
PDF Views:1
Authors
Affiliations
1 Department of Electrical Engineering, National Institute of Technology, Rourkela – 769008, IN
1 Department of Electrical Engineering, National Institute of Technology, Rourkela – 769008, IN
Source
Power Research, Vol 15, No 2 (2019), Pagination: 130-135Abstract
In recent times, optical spectroscopy techniques are being widely accepted for chemical analysis of transformer oil. These techniques gained popularity because of the advantages like they are quite simple to perform, give results very quickly, outcome is reliable, and they are economical. Unlike traditional methods, these can also be carried out online with cost effective equipments. In this work, breakdown voltage test is done and then, UV-Visible (UV-Vis) spectroscopy and Fourier Transform Infrared (FTIR) spectroscopy techniques have been used to investigate the condition of the transformer oil. To replicate the actual aging of oil in field, partial discharge (PD) in the laboratory environment has aged oil samples. Test results obtained from UV-Vis spectroscopy gives the qualitative analysis of transformer oil and FTIR spectroscopy evaluates the functional group present in it. The analysis is done precisely by relating the optical spectra obtained by spectroscopy techniques with the duration of aging. The results obtained justify that the optical spectroscopy techniques used, can accurately analyze the condition of aged transformer oil.Keywords
Fourier Transform Infrared, Partial Discharge, Spectroscopy, Ultraviolet Visible Spectroscopy, Transformer Oil.References
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- Kalathiripi H, Karmakar S. Fault analysis of oil-filled power transformers using spectroscopy techniques. 9th IEEE International Conference on Dielectric Liquids (ICDL), Manchester, United Kingdom; 2017 Jun. https://doi.org/10.1109/ICDL.2017.8124633
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