- B. P. Radhakrishna
- V. S. Hegde
- S. M. Naqvi
- D. Srinivasa Sarma
- R. H. Sawkar
- M. Ram Mohan
- J. G. Rana Prathap
- P. Jagadeesan
- K. S. Mishra
- P. V. Ramesh Babu
- Tapan Pal
- Sambhunath Ghosh
- Fareeduddin
- Kamal Kant Sharma
- B. N. Singh
- K. S. Misra
- O. P. Somani
- Chanchal Sarbajna
- R. P. Sinha
- R. Dhana Raju
- E. V. S. S. K. Babu
- D. Bhattacharya
- H. V. Ram Babu
- Prasanti Lakshmi
- V. Jayanthi
- Anjan Chaki
- Yamuna Singh
- T. N. Singh
- P. Mohan Babu
- K. R. P. Rao
- A. Vasanthi
- K. Mallick
- Gauri Dole
- Ninad Bondre
- Raymond A. Duraiswami
- Vivek S. Kale
- B. Mahabaleswar
- M. Ramakrishnan
- K. Surya Prakash Rao
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Viswanathan, S.
- A System of Classification and Nomenclature of Granitic Rocks
Authors
1 Atomic Minerals Division, Department of Atomic Energy, New Delhi, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 14, No 3 (1973), Pagination: 243-248Abstract
The paper proposes a system of classification and comprehensive kinematic-descriptive-genetic nomenclature of granitic rocks based on results of detailed petrographic studies of samples from the southern margin of the Canadian shield. Unlike the schemes currently in use that emphasise only the relative proportions of quartz, potassium-feldspar and plagioclase, the proposed classification recognizes the significance of several additional parameters: (a) biotite/amphibole ratios, (b) non-opaque calcic trace mineral contents (e.g., sphene, apatite, epidote), and (c) plagioclase compositions. Using these parameters, a new modal Quartz-Alkali feldspar-Plagioclase ternary diagram is presented. An example of a comprehensive kinematic-descriptive-genetic nomenclature of granitic rocks, derived from the proposed system is: 'late-kinematic, pink, slightly porphyritic, weakly foliated, medium- to coarse-grained, chloritized, muscovite-biotite-albite (An6)-microcline leucogranitic anatexite', The proposed system should prove useful in mineral exploration programmes aimed at locating rare-mineralic granitic bodies, and in inter-continental petrographic comparisons.
- Group Discussion on Geochemistry of the Precambrian Rocks of India
Authors
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 15, No 2 (1974), Pagination: 219-221Abstract
No Abstract.Full Text
- Contemporary Trends in Geochemical Studies of Early Precambrian Greenstone-Granite Complexes
Authors
1 Atomic Minerals Division, Hyderabad, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 15, No 4 (1974), Pagination: 347-379Abstract
Modern geochemical studies of > 2600 m.y. old greenstone-granite complexes involving isotopic dating, isotope tracer studies, and major- and trace-element investigations have clarified several enigmatic aspects of the earth's early evolution, and of Precambrian petrogenesis and metallogenesis. Results show that:
The ancient greenstone belts (age, 2700-3400 m.y.) are relatively younger than the ancient granulite belts (age, 2900-3800 m.y.), The greenstone belts developed dichronously, those in southern Africa forming before the ones in Canada, India, and Australia. Sedimentary rocks as old as 3375 m.y. and 3760 m.y. occur in South Africa and Greenland, respectively.
The protocrust was possibly composed of 'komatiite' (a rock type more primitive than oceanic tholeiite), and an ultramafic variant of it ('peridotitic komatiite ') could fairly represent the composition of the protomantIe. A major differentiation episode within the earth's upper mantle generated a distinctive tonalitic magma as a complementary response to the immediately preceding vast outpouring of the large pristine komatiites. The protocore was much less developed than at present.
Ancient volcanic rocks evolved in an environment dominated by multiple thin oceanic plates with arc-trench boundaries, and shallow subduction zones. Problems of Early Precambrian greenstone belts may be solved if the first sialic crust comprised small masses concentrated by plate tectonic processes similar to those still operating.
Early Precambrian basalts are products of magma derivation from very shallow depths (less than 50 km) by high degrees (more than 30%) of partial melting. Some of the associated granitic rocks originated from mantle depths by partial melting of eclogite. Early Precambrian greenstone-granite complexes may be deformed terrestrial equivalents of lunar maria. The occurrence in charnockitic terrains of southern India of rocks of komatiitic chemistry suggests that these terrains evolved from Barberton type Early Precambrian greenstone belts that were subjected to granulite-facies metamorphism.
The principal metals of ancient ores were derived from sources in the mantle, and their accumulation as ore deposits is related to the two dominant processes of the restless and mobile Early Precambrian crust, namely, mafic magmatism, and granite formation. As far back as 3000 m.y. ago, however, there was no secular trend of relative enrichment in the light rare-earth elements (La-Sm) relative to the heavy REE (Gd-Lu) in sedimentary rocks.
- Geochemical Studies of the Precambrian of India: Suggestions for Future Research Work
Authors
1 Atomic Minerals Division, Hyderabad, IN
2 Geological Society of India, Bangalore, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 15, No 4 (1974), Pagination: 469-473Abstract
A critical evaluation of the scope, nature, and results of the geochemical researches so far conducted on the Precambrian of India, when viewed against the background of contemporary global trends, reveals that India lags very much behind countries like Canada, the U.S.A., South Africa, and Australia in this important discipline. To remedy, and even reverse this rather unfortunate situation, the paper proposes some major research projects aimed at elucidating (I) the geochronological evolution of the Indian Precambrian; (2) geochemical affinities and evolution of Early Precambrian volcanic-plutonic complexes; (3) nature of the Indian protocrust; (4) evolution of Iron formations and related chemical sedimentary rocks; (5) bio-geochemistry of the Indian Precambrian; (6) geochemical facies of granitic complexes; (7) Precambrian ore genesis and metallogeny in India; (8) evolution of Precambrian carbonatite complexes; (9) episodes of Precambrian volcanism and plutonism; (10) nature of 'cratonization' in Peninsular India; (11) core-mantle-crust differentiation in the Indian sub-continent; and (12) plate-tectonic regimes in the Precambrian of India, and related metallogenic provinces.
As fundamental geochemical researches on the Indian Precambrian are extremely relevant to India's planning for socio-economic uplift, because the results can be applied to projects aimed at locating new ore deposits, the paper emphasises that unless the Government of India sets up expeditiously a National Institute of Precambrian Geochemistry, it would be impossible for India to plan meaningful mineral exploration programmes in the future, and to catch up with the tremendous advances made in the western world. The structure of such an institute is outlined in Table I of the paper.
- Geochemistry and Petrogenesis of Basic Dykes of Agali Area, Palghat District, Kerala
Authors
1 I.I.T., Bombay, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 25, No 7 (1984), Pagination: 471-471Abstract
No Abstract.Full Text
- Petrogenetic Significance of Zn Distribution, and of Zn/Fe, Zn/Pb Ratios in Granitic Biotites
Authors
1 Atomic Minerals Division, Department of Atomic Energy, New Delhi, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 14, No 1 (1973), Pagination: 23-30Abstract
The zinc content of biotite is a potentially useful petrogenetic tracer to determine if a granitic pluton formed by magmatism (crystallization-differentiation), metasomatism, or anatexis. This conclusion stems from a geochemical study of Zn distribution, and of Zn/Fe, Zn/Pb ratios in granitic biotites from the 2.7 billion year old Giants Range batholith of northeastern Minnesota, U.S.A. Results show that the zinc contents of biotites from metasomatic granitoids (477 ppm), anatectic tonalites (498 ppm) and their parent metasedimentary rocks (498 ppm) are significantly lower than those characterizing magmatic granites (754 ppm) and magmatic leucogranites (943 ppm). Also, in a magmatically fractionated series of granit c rocks, the Zn contents and Zn/Fe ratios of biotires increase progressively in the sequence tonalite-granodiorite-adamellite-graniteleucogranite, whereas the Zn/Pb ratios decrease.- The Talented Naidu Brothers: Jagapathi Naidu and Seethapathi Naidu
Authors
1 Flat B-203, Block-B, United Avenue Apartments, South End, 7-1-29, Ameerpet, Hyderabad – 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 72, No 6 (2008), Pagination: 824-825Abstract
No abstract.Full Text
- Geochemistry of Dykes around Arabail, Western Dharwar Craton and Petrogenetic Inferences
Authors
1 B-160, Ananta, IIT Campus, Powai, Mumbai - 400 076, IN
2 SDMCET, Dharwad - 580 002, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 72, No 2 (2008), Pagination: 281-281Abstract
No Abstract.Full Text
- Role of Adakitic Magmatism and Subduction in Gold Endowment of Dharwar NEO-Archaean Greenstone Belts
Authors
1 Flat B-203, Block-B, United Avenue Apts, South End, 7 1-29, Ameerpet, Hyderabad-500016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 72, No 4 (2008), Pagination: 576-577Abstract
No Abstract.Full Text
- New Occurrence of Mangano-Columbite from Late Proterozoic Pegmatites of Bhurpidungri, Jharsuguda District, Orissa
Authors
1 Hyderabad - 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 71, No 4 (2008), Pagination: 591-593Abstract
No Abstract.Full Text
- The 2005 Eruption of Barren Volcano: An Explosive Inner Arc Volcanism in Andaman Sea
Authors
1 IIT - Campus, Powai, Mumbai, IN
2 Geological Survey of India, Kolkata, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 71, No 4 (2008), Pagination: 599-599Abstract
No Abstract.Full Text
- Chondritic Features in a Diamondiferous Rock, Ma Jhgawan, Central India: Implications for Diamond Genesis
Authors
1 Director, Geological Survey of India, Petrology Division, Eastern Regions, DK-6, Sector II, Salt Lake City, Kolkata - 700 091, IN
2 Geological Survey of India, PPOD Division, AMSE Wing, Bangalore - 560 078, IN
3 503/23-C MHADA Complex, Hiranandani, Powai, Mumbai - 400 076
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 69, No 4 (2007), Pagination: 863-864Abstract
No Abstract.Full Text
- Petrology and Geochemistry of the Mount ABU Granites, Southwestern Rajasthan
Authors
1 Government Postgraduate College, Sirohi - 307 001, IN
2 Department of Civil Engineering, Banaras Hindu University, Varanasi - 221 005, IN
3 Flat B-203, Block-B, United Avenue Apts., South End, 7-1-29, Ameerpet, Hyderabad - 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 69, No 6 (2007), Pagination: 1372-1375Abstract
No Abstract.Full Text
- New Occurrence of Manganocolumbite from Late Proterozoic Pegmatites of Bhurpidungri, Jharsuguda District, Orissa
Authors
1 Flat B-203, Block-B, United Avenue Apartments, South End, 7- 1-29, Ameerpet, Hyderabad- 500 016, IN
2 Atomic Minerals Directorate for Exploration and Research, Civil Lines, Nagpur -440 001, IN
3 Atomic Minerals Directorate for Exploration and Research, Begumpet, Hyderabad - 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 67, No 4 (2006), Pagination: 547-549Abstract
No Abstract.Full Text
- Tantalum in Tin Slag-A Report from Bastar Pegmatite Belt
Authors
1 Flat B-203, Block-B, United Ave Apts,South End, 7-1-29, Ameerpet, Hyderabad - 500 016, IN
2 Department of Atomic Energy, Atomic Minerals Directorate for Exploration and Research, West Block-7, R K Puram, New Delhi - 110 066, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 66, No 3 (2005), Pagination: 372-372Abstract
No Abstract.Full Text
- Prof. B. Bhaskara Rao (1937-2005)
Authors
1 10 Bapuji Apartments Dombivli (East), Mumbai - 421 201, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 66, No 2 (2005), Pagination: 258-258Abstract
No Abstract.Full Text
- Ree Geochemistry of the Uranium Phases in S YN-Magmatic and Hydrothermal-Type U-Mineralisation: Two Case Histories from India
Authors
1 Flat B-203, Block-B, United Avenue Apts., South End, 7-1-29, Ameerpet, Hyderabad - 500 016, IN
2 3-27, Kavalipuram, (via) Velpur-Tanuku - 534 222, West Godavari District, Andhra Pradesh, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 62, No 4 (2003), Pagination: 516-516Abstract
No Abstract.Full Text
- Three-Phased Temporal Evolution of the Jhirgadandi Granite Complex, Sonbhadra District, Uttar Pradesh
Authors
1 Flat B-203, Block-B, Unite Avenue Apts, South End, 7-1-29, Ameerpet, Hyderabad - 500 016, IN
2 AMD/DAE, NR West Block-7, R K Puram, New Delhi - 66, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 71, No 3 (2008), Pagination: 437-438Abstract
No Abstract.Full Text
- A Note on Geological Mapping of the Granulite Terranes Surrounding the Godavari Basin
Authors
1 10, Bapuji Apartments, Dombivili (East), Mumbai - 421 201, IN
2 National Geophysical Research Institute, Hyderabad, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 68, No 6 (2006), Pagination: 1115-1115Abstract
No Abstract.Full Text
- Resources of Uranium and Heavy Minerals in India
Authors
1 Hyderabad, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 74, No 4 (2009), Pagination: 539-539Abstract
No Abstract.Full Text
- International Journal of Earth Science and Engineering
Authors
1 IIT Campus, Powai, Mumbai - 400 076, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 74, No 1 (2009), Pagination: 146-146Abstract
No Abstract.Full Text
- Correspondence: "Heavenly Bounty" - Some Thoughts on Impact Metallogeny
Authors
1 IIT Bombay, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 73, No 2 (2009), Pagination: 294-294Abstract
No Abstract.Full Text
- The 'Average' Barium Contents of High Calcium and Low Calcium Granitic Rocks
Authors
1 Hyderabad, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 75, No 2 (2010), Pagination: 457-457Abstract
No Abstract.Full Text
- Magmatism, Tectonism and Mineralization
Authors
1 B-160, Ananta, IIT-B Campus, Powai, Mumbai - 400 076, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 75, No 3 (2010), Pagination: 563-565Abstract
No Abstract.Full Text
- A New Book on Komatiites
Authors
1 AMD, DAE, Hyderabad - 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 75, No 4 (2010), Pagination: 662-662Abstract
No Abstract.Full Text
- India-Born Nobel Laureates
Authors
1 Flat B-203, Block-B United Ave., Apts., IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 75, No 4 (2010), Pagination: 663-663Abstract
No Abstract.Full Text
- Wavelength-Dispersive X-Ray Fluorescence Spectrometric Determination of Tantalum in Columbite-Tantalite Using Takα and an Lif 420 Analysing Crystal
Authors
1 Atomic Minerals Directorate for Exploration and Research, Begumpet, Hyderabad - 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 76, No 2 (2010), Pagination: 171-174Abstract
The paper proposes a simple, accurate, precise, and rapid method for determining the high atomic number (Z) major-element, tantalum (Z = 73), in the rare mineral, columbite [(Fe,Mn) (Nb,Ta)2O6] - tantalite [(Fe,Mn) (Ta,Nb)2O6], by wavelength-dispersive x-ray fluorescence spectrometry (WDXRFS). The other major-element in columbite-tantalite is the lower atomic number niobium (Z = 41). The method uses the characteristic radiation, TaKα, and an LiF 420 analysing crystal, to overcome the problems associated with the serious x-ray spectral-line interference of the secondorder NbKα and NbKβ with the first-order TaLα1 and TaLβ1 respectively.
Samples of columbite-tantalite ground to minus 300 mesh are blended with cellulose in the proportion of 1:1, and pressed powder-pellets are made from 1-g aliquots, with boric acid as a backing. The analytical standards consist of chemically analysed columbite-tantalite containing 5 to 80% by weight of Ta2O5. The instrumental parameters include a rhodium x-ray tube (operating voltage = 100 kV; current = 10 mA), air path, fine collimator (150 μm), and scintillation counter. The counting involves fixed time with three readings of 20s each on the peak and three readings of 20s each on one background.
The accuracy achieved is excellent (within 1.6 to 2.2%), as is the precision (within 0.4 to 2.4%). The time taken for determining Ta2O5 in a batch of twentyfour samples of columbite-tantalite, for a replication of four analyses per sample, by one operator using a manual WDXRF spectrometer, is only five hours.
Keywords
X-Ray Spectrometry, WDXRFS, Columbite-Tantalite, TaKα Radiation, LiF 420 Analysing Crystal.- Engineering Geology
Authors
1 Department of Earth Sciences, IIT Bombay, Mumbai – 400 076, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 76, No 2 (2010), Pagination: 189-189Abstract
No Abstract.Full Text
- G.R. Narayan Das (1926-2010)
Authors
1 AMD, DAE, Hyderabad, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 76, No 3 (2010), Pagination: 295-295Abstract
No Abstract.Full Text
- Pattern of Occurrence of Kimberlite Pipes Based on Gravity and Magnetic Anomalies in Wa Jrakarur-Lattavaram Region, Andhra Pradesh
Authors
1 Geological Survey of India Training Institute, Hyderabad - 500 068, IN
2 10, Bapuji Apts., Rajendra Prasad Road, Dombivli (East) Mumbai - 421 201, IN
3 NGRI, Hyderabad - 500 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 60, No 3 (2002), Pagination: 350-352Abstract
No Abstract.Full Text
- Arterial System of Lava Tubes and Channels within Deccan Volcanics of Western India
Authors
1 10, Bapuji Apts., Rajendra Prasad Raod, Dombivli (East) - 421 201, IN
2 Geological Survey of India, Alandi Road, Phule Nagar, Pune - 411 006, IN
3 238, Narayan Felli, Pune, 411 030, IN
4 114 Shideler Hall, Department of Geology, Miami University, Oxford, Ohio 45056, US
5 A16 Gurudut Housing Society, Srinagar, Kalewadi Phatta, Rahatani, Pune - 411 017, IN
6 Kalyani Net Ventures Ltd., Pune, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 60, No 5 (2002), Pagination: 595-600Abstract
No Abstract.Full Text
- Paul K. Sims (1918-2011)
Authors
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 79, No 1 (2012), Pagination: 96-97Abstract
No Abstract.Full Text
- Geochemical Behaviour of Vanadium, Chromium, Cobalt, Nickel, and Copper during Progressive Chloritization of Biotites in Granites
Authors
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Government of India, 1-10-153-156, Begumpet, Hyderabad – 500 016, IN
2 Department of Geology, Bangalore University, Bangalore, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 80, No 3 (2012), Pagination: 301-303Abstract
Evaluation of the vanadium, chromium, cobalt, nickel, and copper contents of five biotites, chloritized to varying degrees, from a magmatic granitic series of the 2700-million-year-old Giants Range Batholith of Northeastern Minnesota, USA, on the southern margin of the Canadian Shield, determined by wavelength-dispersive x-ray fluorescence spectrometry, shows that, during progressive chloritization of biotites in granites, the content of vanadium decreases and the contents of chromium, cobalt, nickel, and copper increase. The results emphasise the need for great caution when interpreting whole-rock trace-element data in petrological research.Keywords
Granitic Biotites, Chloritization, Vanadium, Chromium, Cobalt, Nickel, Copper, Geochemical Behaviour, Giants Range Batholith, Minnesota, USA.References
- CHAYES, F. (1955) Potash feldspar as a by-product of the biotite-chlorite transformation. Jour. Geol., v. 63, pp. 75-82.
- FLANAGAN, F.J. (1969) U.S. Geological Survey Standards-II. First compilation of data for the new U.S.G.S. rocks. Geochim. Cosmochim. Acta, v. 33, pp. 81-120.
- FLANAGAN, F.J. (1973) 1972 values for International geochemical reference sample. Geochim. Cosmochim. Acta, v. 37, pp. 1189-1200.
- PHINNEY, W.C. (1963) Phase equilibria in the metamorphic rocks of St. Paul Island and Cape North, Nova Scotia. Jour. Petrol., v. 4, pp. 90-130.
- SCHWARTZ, G.M. (1958) Alteration of biotite under mesothermal conditions. Econ. Geol., v. 53, pp. 164-177.
- SIMS, P.K. and VISWANATHAN, S. (1972) Giants Range Batholith. In: P.K. Sims and G.B. Morey (Eds.) Geology of Minnesota: A Centennial Volume, Minnesota Geological Survey, St. Paul, Minnesota, USA, pp. 120-139.
- TUREKIAN, K.K. and PHINNEY, W.C. (1962) The distribution of Ni, Co, Cr, Cu, Ba and Sr between biotite-garnet pairs in a metamorphic sequence. Amer. Min., v. 47, pp. 1434-1441.
- VISWANATHAN, S. (1972) Geochemical behaviour of Rb, Ba, Pb, Ti, Mn, and Zn during progressive chloritization of granitic biotites. Curr. Sci., v. 41, pp. 655-658.
- The Abundances of Some Trace-Elements in the First-Ever Reported Sample of Spinifex-Textured Komatiite from Ghatti Hosahalli, Karnataka
Authors
1 "Manipallavam", 29, Balakrishna Road, Valmiki Nagar, Thiruvanmiyur, Chennai - 600 041, IN
2 Department of Geology, Bangalore University, Bangalore - 560 056, IN
3 Flat B-203, Block-B, United Avenue Apartments, South End, 7-1-29, Ameerpet, Hyderabad - 500 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 79, No 4 (2012), Pagination: 361-366Abstract
The paper reports wavelength-dispersive x-ray fluorescence spectrometric data on the abundances of Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Ba, Pb, and Th in the first-ever reported sample of spinifex-textured komatiite from India at Ghatti Hosahalli in Karnataka. With some exceptions, these abundances are similar to those reported for the spinifex-textured komatiite from the Barberton greenstone belt in South Africa. The values for some alteration-resistant element ratios - Ti/Zr, Ti/Y, Ti/Sc, Ti/V, Zr/Y, Zr/Sc, Sc/Y, V/Zr, and V/Sc - for chondrite and for spinifex-textured komatiites from Ghatti Hosahalli (India), Barberton (South Africa), Munro (Canada), and Yilgarn (Australia) reveal that, except for the Ti/Zr ratio for the Ghatti Hosahalli komatiite, the other ratios from the four terrains define a unique trend that is almost superimposed on the trend defined by these ratios for chondrite. This suggests that the processes of formation of komatiitic lavas from the four far-separated terrains were similar, and that, the source regions from which these lavas formed had a chondritic composition.Keywords
Komatiite, Trace-Elements, Ghatti Hosahalli, Karnataka, India, Barberton, Munro, Yilgarn.References
- AHRENS, L.H. (1965) Distribution of the Elements in our Planet. McGraw-Hill Book Company, New York, 110p.
- ARNDT, N.T. and NESBITT, R.W. (1982) Geochemistry of Munro Township basalts. In: N.T. Arndt and E.G. Nisbet (Eds.), Komatiites. Allen Unwin, London, pp.309-329.
- CHADWICK, B., RAMAKRISHNAN, M. and VISWANATHA, M.N. (1981) Structural and metamorphic relations between Sargur and Dharwar supracrustal rocks and Peninsular Gneiss in Central Karnataka. Jour. Geol. Soc. India, v.22, pp.557-569.
- DEVARAJU, T.C., RAITH, M.M. and SPIERING, B. (1999) Mineralogy of the Archaean barite deposit of Ghatti Hosahalli, Karnataka, India. Canadian Mineralogist, v.37, pp.603-617.
- JAYANANDA, M., KANO, T., PEUCAT, J.-J. and CHANNABASAPPA, S. (2008) 3.35 Ga komatiite volcanism in the western Dharwar craton, southern India: constraints from Nd isotopes and whole-rock geochemistry. Precambrian Res., v.162, pp.160-179.
- LUDDEN, J.N. and GELINAS, L. (1982) Trace element characteristics of komatiites and komatiitic basalts from the Abitibi metavolcanic belt of Quebec. In: N.T. Arndt and E.G. Nisbet (Eds.), Komatiites. Allen Unwin, London, pp.331-346.
- NARAYANA, B.L. and NAQVI, S.M. (1980) Geochemistry of spinifextextured peridotitic komatiites from Ghatti Hosahalli, Karnataka, India. Jour. Geol. Soc. India, v.21, pp.194-198.
- NESBITT, R.W. and SUN, S.-S. (1976) Geochemistry of Archaean spinifex textured peridotites and magnesian low-magnesian tholeiites. Earth Planet. Sci. Lett., v.31, pp.433-453.
- NESBITT, R.W. and SUN, S.-S. (1980) Geochemical features of some Archaean and Post-Archaean high-magnesian-low-alkali liquids. Phil. Trans. Roy. Soc., A, pp.229-242.
- PARANTHAMAN, S. (2005) Geology and geochemistry of Archaean Ghatti Hosahalli mafic-ultramafic complex, Chitradurga, Karnataka, Jour. Geol. Soc. India, v.66, pp.653-657.
- RADHAKRISHNA, B.P. and SREENIVASAIAH, C. (1974) Bedded barites from the Precambrian of Karnataka. Jour. Geol. Soc. India, v.15, pp.314-315.
- SMITH, H.S. and ERLANK, A.J. (1982) Geochemistry and petrogenesis of komatiites from the Barberton greenstone belt, South Africa. In: N.T. Arndt and E.G. Nisbet (Eds.), Komatiites. Allen Unwin, London, pp.347-397.
- VISWANATHA, M.N. (1977) Spinifex texture in serpentinite from Karnataka. Jour. Geol. Soc. India, v.18, p.623.
- VISWANATHA, M.N. and RAMAKRISHNAN, M. (1976) The pre-Dharwar supracrustal rocks of Sargur schist complex and their tectonicmetamorphic significance. Indian Mineralogist, v.16, pp.48-65.
- VISWANATHA, M.N., RAMAKRISHNAN, M. and NARAYANAN KUTTY, T.R. (1977) Possible spinifex texture in a serpentinite from Karnataka. Jour. Geol. Soc. India, v.18, pp.194-197.
- WANKE, H.H., BADDENHANSEN, H., PALME, H. and SPETTEL, B. (1974) On the chemistry of the Allende inclusions and thier origin as high temperature condensates. Earth Planet. Sci. Lett., v.23, pp. 1-14.
- Making the Journal of the Geological Society of India more Useful and Interesting
Authors
1 Hyderabad, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 80, No 2 (2012), Pagination: 290-290Abstract
No Abstract.Full Text