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Aswathanarayana, U.
- Radioactivity of some Rock Types of Andhra State, India
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Authors
Affiliations
1 Department of Geology, Andhra University, Waltair, IN
1 Department of Geology, Andhra University, Waltair, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 2, No 0 (1961), Pagination: 11-22Abstract
Beta-activity has been determined for 37 rocks (12 gneisses, 7 granites, 7 charnockites. 5 calc-granulites and 6 schists) drawn from various parts of Andhra Pradesh. For 15 samples selected from the above groups, alpha-activity was also determined, for effecting a comparative study of the two sets of measurements. The present work confirms the results of previous studies which showed that the beta-activity of a rock is conditioned by the following mutually-related factors: chemical composition (Fe2O3: FeO ratio, silica, potash, alumina, and calcium oxide concentrations), mineralogical composition (quartz, feldspar and heavy mineral contents), and petrogenetic history. The discrepancies in the equivalent uranium content of rocks as deduced from their beta- and alpha-activities, are traced to the variations in the concentration of beta-emitting K40 and U : Th ratios.- 31st International Geological Congress, Rio De Janeiro, Brazil, August 6-17,2000
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Authors
Affiliations
1 C.P 1947, Maputo, Mozambique, ZA
1 C.P 1947, Maputo, Mozambique, ZA
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 56, No 4 (2000), Pagination: 459-460Abstract
No Abstract.- Petrological Studies in Parts of the Closepet Granite Pluton, Mysore State
Abstract Views :212 |
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Authors
Affiliations
1 National Geophysical Research Institute, Hyderabad, IN
2 Centre of Advanced Study in Geology, UniversIty of Saugar, Sagar (M.P.), IN
1 National Geophysical Research Institute, Hyderabad, IN
2 Centre of Advanced Study in Geology, UniversIty of Saugar, Sagar (M.P.), IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 13, No 1 (1972), Pagination: 1-12Abstract
With the object of investigating the mode of origin of the Closepet granite, Mysore state, India, integrated geological, geochemical and geophysical studies have been made of the northern part of the pluton as also the adjacent Chitaldurg and Hosdurga granites and Penmsular gneiss. The Joints (post-emplacement'l) in the Closepet granite and the ratios of mineral pairs indicate that (i) the grey and the pink varieties of the Closepet granite and the Chitaldurg granite are comparable to many respects and might have had a common mode of origin, (ii) the Hosdurga granite is distinguishable from the above granites in having a lower amount of quartz and K-feldspar and higher amounts of plagioclase and mafics and (iii) the Peninsular gneiss markedly differs from the Closepet and Chitaidurg granites, and departs from them in the same direction as the Hosdurga granite but in a more accentuated way. A two-stage model for the origin of the Closepet granite is supported by the following petrological evidence presence of two generations of quartz, unzoned anhedral plagioclase, replacement of plagioclase by microcline and the presence of perthite and myrmekite along With K-feldspar and quartz. The Closepet granite was apparently formed by palingenesis (starting from the Peninsular gneiss) and metasomatism involving enrichment in Si, K and Na, among other elements.- Ore Elements in the Metavolcanics of Ingaldhal Karnataka State, India, as Possible Guides in Ore Search
Abstract Views :238 |
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Authors
Affiliations
1 Hindustan Zinc Limited, Zawar Mines P.O., Udaipur Dist., Rajasthan, IN
2 Centre of Advanced Study in Geology, University of Saugar, Sagar, M.P., IN
1 Hindustan Zinc Limited, Zawar Mines P.O., Udaipur Dist., Rajasthan, IN
2 Centre of Advanced Study in Geology, University of Saugar, Sagar, M.P., IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 18, No 2 (1977), Pagination: 72-77Abstract
Sixteen samples of metavolcanics of Ingaldhal have been analysed for sulphur and for Cu, Co, Ni and Zn (in the hydrogen peroxide-ascorbic acid leach solution). There is no visible mineralisation where the S content in the metavolcanics is below 200 ppm. A sulphur content of more than 500 ppm and/or a copper content of more than 200 ppm in the hydrogen peroxide-ascorbic acid leach, may be indicative of economically important copper mineralisation in the Ingaldhal-type metavolcanics. Mineralised metavolcanics are apparently characterised by higher Cu/Ni (> 90)& Cu/Co (> 60) ratios and lower Co/S(< 0.03) & Ni/S (<0.02) ratios than barren metavolcanics.
- In Memory of Clair C. Patterson (1922-1995)
Abstract Views :185 |
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Authors
Affiliations
1 Adviser on Environment & Technology C.P. 1947, Maputo, MZ
1 Adviser on Environment & Technology C.P. 1947, Maputo, MZ
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 48, No 5 (1996), Pagination: 591-592Abstract
No Abstract.- Arsenic in Groundwater, West Bengal
Abstract Views :210 |
PDF Views:129
Authors
Affiliations
1 Maputo, Mozambique, ZA
1 Maputo, Mozambique, ZA
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 49, No 3 (1997), Pagination: 341-345Abstract
No Abstract.- A Paradigm for Geoscience Instruction in the Developing Countries in the Twenty-First Century
Abstract Views :196 |
PDF Views:140
Authors
Affiliations
1 Maputo, Mozambique, ZA
1 Maputo, Mozambique, ZA
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 49, No 4 (1997), Pagination: 454-458Abstract
No Abstract.- The Nuclear Renaissance: A Geoscience Perspective
Abstract Views :175 |
PDF Views:125
Authors
Affiliations
1 Mahadevan International Centre for Water Resources Management, Hyderabad-500082, IN
1 Mahadevan International Centre for Water Resources Management, Hyderabad-500082, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 71, No 2 (2008), Pagination: 295-298Abstract
No Abstract.- 3-D Visualisation of Geological Processes
Abstract Views :223 |
PDF Views:136
Authors
Affiliations
1 R-16, Shanti Shikara Apts. Somajiguda, Hyderabad - 500 082, IN
1 R-16, Shanti Shikara Apts. Somajiguda, Hyderabad - 500 082, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 66, No 2 (2005), Pagination: 247-247Abstract
No Abstract.- Roundtable discussion on Natural Resources Management, Geoscience Instruction and Jobs
Abstract Views :189 |
PDF Views:132
Authors
Affiliations
1 B-16, Shanti Sikhara Apts. Somajiguda Hyderabad -500 082, IN
1 B-16, Shanti Sikhara Apts. Somajiguda Hyderabad -500 082, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 63, No 2 (2004), Pagination: 228-230Abstract
No Abstract.- Bhuskara Rao Adusumilli ( 1928-2003)
Abstract Views :170 |
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Authors
Affiliations
1 Hyderabad, IN
1 Hyderabad, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 63, No 5 (2004), Pagination: 576-576Abstract
No Abstract.- Technological Inputs for the Development of the Gold Industry in India
Abstract Views :193 |
PDF Views:150
Authors
Affiliations
1 B-16, Shanti Sikhara Apts, Somajiguda, Hyderabad - 500 082, IN
1 B-16, Shanti Sikhara Apts, Somajiguda, Hyderabad - 500 082, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 61, No 2 (2003), Pagination: 226-229Abstract
This note seeks to develop a plan of action for the gold industry in India, on the basis of the identification of the lithological environments where gold can be expected to occur, in situ analysis of gold at ppm levels, and using "portable" plants for the extraction of gold at concentration levels of 1-3 g/t , employing the carbon-in-pulp/carbon-in-leach technologies.- An Action Plan to Make Geoscience Education in India Employment-Oriented and Relevant
Abstract Views :171 |
PDF Views:131
Authors
Affiliations
1 Mahadevan International Centre for Water Resources Management, Hyderabad, IN
1 Mahadevan International Centre for Water Resources Management, Hyderabad, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 62, No 4 (2003), Pagination: 503-506Abstract
No Abstract.- Mahadevan Birth Centenary Celebrations: May 4-10,2001
Abstract Views :182 |
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