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Rao, M. N.
- Current Status of Palaeoseismology in India - An Overview
Abstract Views :188 |
PDF Views:2
Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad-500 007, IN
1 National Geophysical Research Institute, Hyderabad-500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 55, No 5 (2000), Pagination: 465-480Abstract
Paleoseismic investigations so far carried out in India are spread over two tectonically distinct areas, viz., the interplate seismic zone of Himalaya and the intraplate Stable Continental Region (SCR). Most of the reported paleoseismicity studies provided geological evidences like soft sediment deformation, paleoliquefaction features (like sand dykes, sand blows etc), small scale folding, faulting with disptacement of beds etc. Though the evaluation of recurrellce period of destructive seismic events is a pre-requisite for paleoseismology, no paleoseismic study in India so far has provided information on the recurrence period, except for the detailed study in the Shillong plateau, which suggested recurrence period of 400-600 yrs for major earthquakes.Keywords
Paleoseismology, Earthquake Hazard, Recurrence Period, Himalaya, Stable Continental Region.- Planetary Atmospheres
Abstract Views :158 |
PDF Views:2
Authors
Affiliations
1 Physical Research Laboratory, Navrangpura, Ahmedabad, IN
1 Physical Research Laboratory, Navrangpura, Ahmedabad, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 27, No 1 (1986), Pagination: 21-29Abstract
No Abstract.- The Jabalpur Earthquake of May 22, 1997
Abstract Views :209 |
PDF Views:2
Authors
H. K. Gupta
1,
R. K. Chadha
1,
M. N. Rao
1,
B. L. Narayana
1,
P. Mandal
1,
M. Ravi Kumar
1,
N. Kumar
1
Affiliations
1 National Geophysical Research Institute, Hyderabad - 560 007, IN
1 National Geophysical Research Institute, Hyderabad - 560 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 50, No 1 (1997), Pagination: 85-91Abstract
The Jabalpur earthquake of magnitude 5.8 occurred on May 22, 1997 along seismically active Narmada-Son Lineament (NSL) in central India, with its epicenter about 30 km southeast of Jabalpur. A maximum intensity Io = VIII on MM scale was observed in Jabalpur and surrounding region. The isoseismal map prepared for this earthquake shows NE-SW trend which in general agrees with the focal mechanism solution indicating thrust faulting along a ENE-WSW fault with minor strike-slip component. Several ground cracks mapped in meizoseismal area show a dominant N75° E trend. The damage pattern of the constructions clearly shows a strong correlation with lithology, structures and soil cover of the area. There are no foreshocks reported for this earthquake and only a few aftershocks are recorded. which warrant a close monitoring of this region.Keywords
Earthquake, Seismology, Jabalpur.- Potasium-Argon Ages and Geochemical Characters of some Basic Igneous Rocks of Cuddapah Basin
Abstract Views :175 |
PDF Views:2
Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
2 Department of Geology, Brooklyn College, City University of New York, Brooklyn, New York 11210, US
3 Department of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, US
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
2 Department of Geology, Brooklyn College, City University of New York, Brooklyn, New York 11210, US
3 Department of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, US
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 69, No 1 (2007), Pagination: 161-170Abstract
The Proterozoic intracratonic Cuddapah Basin contains different phases of igneous intrusives associated with sediments and lava flows from Vempalle Formation and basaltic and dolerite sills from Tadpatri Formation which occur in an arcuate fashion parallel to the basin margin. K-Ar ages suggest that the igneous activity commenced at about 1840 Ma after the initial sedimentation in the basin. Some dolerite sills show ages of about 1000 Ma may represent reequilibrated ages and an interesting younger age of 177±7 Ma is obtained for a norite dyke emplaced in the Cumbum shales of Pullampet Formation in Nallamalai Group of sediments. Basaltic lava flows contain plagioclase (39-48% )and clinopyroxene (18-40%) and opaques (1.5-4%), orthopyroxene (1-2%) and olivine (1.5-4%) are the common accessory phases. A few picrite samples occur at the base of sills in the Tadpatri Formation of Chitravati Group showing cumulus textures and contain olivine, orthopyroxene, clinopyroxene and small amounts of plagioclase. The lava flows and the sills exhibit continental tholeiitic nature and range from basalt to basaltic andesite in composition. They are olivine or quartz normative in character with strong magmatic differentiation trend of iron enrichment during their crystalization. The rocks are enriched in light rare earth elements and exhibit positive Eu anomaly (Eu/Eu*=1.34-2.33). Plagioclase, clinopyroxene ± olivine phenocryst mineralogy, distinctive negative Sr anomaly suggest a relatively low-pressure fractionation during their evolution.Keywords
Basic Volcanics, K-Ar Ages, Geochemistry, Cuddapah Basin, Andhra Pradesh.- Groundwater Targeting in a Shaley Limestone Terrain: an Integrated Approach
Abstract Views :182 |
PDF Views:121
Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
1 National Geophysical Research Institute, Hyderabad - 500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 62, No 6 (2003), Pagination: 769-772Abstract
Shales/limestone, which are devoid of primary porosity, often act as the potential aquifers when they are fractured and/or weathered. An integrated approach employing photogeologicil, hydrogeological and geophysical investigations has now been attempted to delineate groundwater potential zones in such shaley limestone terrain at the southern part of Chandrapur District of Maharashtra. This cost-effective approach, which was focussed at sites delineated from aerial photo interpretation has helped in drilling of good yielding wells in an otherwise unpromising shaley limestone terrain.- "Approaches to Employment Problems in Rural Areas of India"
Abstract Views :154 |
PDF Views:0
Development of bio-gas plants, domestic water treatment techniques, low-cost housing, rural electrification, etc. would not only improve the living standards of the rural people, but would generate employment potential as well.
The best approach to employment problems in rural areas of India, however, seems to lie in educating and training the villagers for self-employment.
Authors
Affiliations
1 Regional Engineering College, Durgapur-713209, IN
1 Regional Engineering College, Durgapur-713209, IN
Source
Journal of the Association of Engineers, India, Vol 53, No 2 (1978), Pagination: 208-213Abstract
India lives in villages and its prosperity will largely depend on the development of rural economy. This paper emphasises the need for the development of rural industries, particularly agro, forest and marine-based industries, by providing employment to a sizeable number of people living in the rural and backward areas. The idea of self employment should be given wide publicity. The need for promoting local enterpreneurship, which is an important element in the development of small-scale industries is stressed. An attempt is made in this paper to advocate the establishment of Rural Institutes.Development of bio-gas plants, domestic water treatment techniques, low-cost housing, rural electrification, etc. would not only improve the living standards of the rural people, but would generate employment potential as well.
The best approach to employment problems in rural areas of India, however, seems to lie in educating and training the villagers for self-employment.
- "Approaches to Employment Problems in Rural Areas of India"
Abstract Views :164 |
PDF Views:0
Authors
Affiliations
1 Regional Engineering College, Durgapur-713209, IN
1 Regional Engineering College, Durgapur-713209, IN
Source
Journal of the Association of Engineers, India, Vol 53, No 4-1 (1978), Pagination: S12-S12Abstract
India lives in villages and its prosperity will largely depend on the development of rural economy. This paper emphasises the need for the development of rural industries, particularly agro, forest and marine-based industries, by providing employment to a sizeable number of people living in the rural and backward areas. The idea of self employment should be given wide publicity. The need for promoting local entrepreneurship, which is an important element in the development of small-scale industries is stressed.- Studies on Nirmali Seed Extract as Coagulant Aid
Abstract Views :166 |
PDF Views:0
Authors
Source
Journal of the Association of Engineers, India, Vol 49, No 4 (1974), Pagination: 101-101Abstract
The extract of an indigenous natural source of polyelectrolyte, nirmali seed, was found to be effective in small doses as an aid in the coagulation of turbid waters by metal coagulants. The extract was found to (1) improve floc size and clarification, (2) reduce considerably the dose of metal coagulant required, (3) remove efficiently the colour bodies from water, (4) overcome the interference of phosphate on coagulation of water by alum and (5) broaden the pH range of coagulation by alum, thereby increasing the flexibility of pH control.- Recent Trends in Sampling and Assessment of Stack Effluents
Abstract Views :137 |
PDF Views:0
The present state of knowledge in this vital field of sampling and analysis of stack effluents along with some critical comments forms the basis of this paper. This field is particularly challenging to the manufacture of equipment for sampling and assessing pollutants.
Authors
N. Kurmaiah
1,
M. N. Rao
1
Affiliations
1 Regional Engineering College, Durgapur, IN
1 Regional Engineering College, Durgapur, IN
Source
Journal of the Association of Engineers, India, Vol 47, No 4 (1972), Pagination: 225-229Abstract
An important problem associated with air pollution control is to obtain a representative sample and to analyse it properly. The sampling techniques of stack effluents (gases as well as particulates) are still unexplored fully. A continuous analysis of the stack effluents is desirable in order to control pollution of the air effectively and efficiently.The present state of knowledge in this vital field of sampling and analysis of stack effluents along with some critical comments forms the basis of this paper. This field is particularly challenging to the manufacture of equipment for sampling and assessing pollutants.