 | | Journal (article/letter/editorial) | | 1–26 Mesoproterozoic granulites of the Shillong–Meghalaya Plateau: Evidence of westward continuation of...Prydz Bay Pan-African suture into Northeastern India Nilanjan Chatterjee a,∗ , A.C. Mazumdar b , A. Bhattacharya...Sciences, Guwahati University, Guwahati 781014, Assam, India Department of Geology and Geophysics, Indian Institute...Institute of Technology, Kharagpur 721302, West Bengal, India Received 27 October 2005; received in revised...continues westward into India. However, the location of the suture within Eastern India has so far been uncertain |  | | Journal (article/letter/editorial) | | Netherlands 175 Sillimanite-Corundum Deposits of Sonapahar, Meghalaya, India: a Metamorphosed Precambrian...GOLANI* Geological Survey of India, Assam-Meghalaya Circle, ShiUong - 793 003 (India) (Received November 4,...1989. Sillimanite-corundumdeposits of Sonapahar, Meghalaya, India: a metamorphosed Precambrian paleosol... 43: 175-189. The Precambrian terrain of the Meghalaya Plateau is characterised by the presence of a...the massive sillimanite-corundumdeposits in the Sonapahar area. The quartz-sillimanite schist forms a distinct |  | | Journal (article/letter/editorial) | | Complex (CGGC) and the Gneissic Complex of Northeast India represent the wider southern belt. The Mahakoshal...the high-grade supracrustals from the Sonapahar area in NE India, all indicate very high P-T conditions...enclaves within the ca. 550 Ma granite plutons from NE India, represent back arc-like setting during 1.6-1.5...belt, and migmatites in the Gneissic Complex in NE India. K e y words: Central Indian Tectonic Zone, continental...al., 1988), the Precambrian rocks of Northeast India and the Eastern Ghats are juxtaposed against the |  | Lal, R. K., Ackermand, D., Seifert, F., Haldar, S. K. (1978) Chemographic relationships in sapphirine-bearing rocks from Sonapahar, Assam, India. Contributions to Mineralogy and Petrology, 67 (2) 169-187 doi:10.1007/bf01046574 | Journal (article/letter/editorial) | | Relationships in Sapphirine-Bearing Rocks From Sonapahar, Assam, India R.K. Lal *, D. Ackermand, F. Seifert, and...with cordierite, gedrite, chondrodite, spinel, corundum and phlogopite in various parageneses, occur in...transition facies. Brucite coexists with spinel and corundum and its unusual stability in this environment...Varanasi-221005, India ** Geologist, Mineral Exploration Corporation, 8/5 Alipur Park Road, Calcutta-27, India or...consisted of the assemblage cordierite-spinel-corundum which then reacted to form sapphirine. This reaction |  | | Journal (article/letter/editorial) | | Aravalli-Delhi orogenic belt, northwestern India M. Deb (Delhi, India), R.I. Thorpe (Ottawa, Ont., Canada)............... Sillimantite-corundum deposits of Sonapahar, Meghalaya, India: a metamorphosed Precambrian...Precambrian paleosol P.R. Golani (Shillong, India) ............................................................craton, South India R. Srinivasan, S.M. Naqvi, B. Uday Raj, D.V. Subba Rao (Hyderabad, India) M. Shukla...Shukla, V.K. Yadav and B.S. Venkatachala (Lucknow, India) ................................................ |  | | Journal (article/letter/editorial) | | products of Proterozoic rhyolitic metavolcanic rocks at West Bergslagen, Sweden (Baker and de Groot, 1983) and...Garpenberg sulphide deposit, Sweden (Vivallo, 1985 ). At West Bergslagen, seawater-rock interaction in discordant...behaviour (enrichment at Garpenberg, depletion at West Bergslagen) and relatively constant Si, Ti, A1and...although the lattermost are strongly depleted at West Bergslagen. During hydrothermal alteration of acid...(hematite+hydrated Al-oxides) to emery (magnetite+corundum) has been demonstrated in the field (Onay, 1949; |  | | Book | | I h INDIA-THE J;AND AND PEOP.LE i1i I I t I 1 ,MINERALS MRS4 MEHER D. N'° WADIA I I I E.dlted...Minerals ot India N /VJ 'j .. ;i • ~lrlt IA Hv.J&ll l~t.W OE.LUI '- - MINERALS OF INDIA and trainin...Organisation, Ministry of Education, Government of India, Calcutta. Dr. George K uriyan, Ph.D. (London),...Dr. H. Santapau, . Director, Botanical Survey of India, Calcutta. Dr. M. S. Randhawa, D.Sc., GEOLOGY Dr...Geology & Geological Ad':'iser to the Govt. of India, New Delhi. Dr. M. S. Krishnan, l'vf.A., Ph.D. (London) |  | | Report (volume) | | amphiboles, phlogopitic biotite, zincian spinel, corundum, plagioclase (calcic andesine to labradorite)...three localities approximately 4 km (kilometers) west of San Isabel in the southern Wet Mountains, Custer...lesser amounts at the unnamed prospect 150 m (meters) west-northwest of the Amethyst prospect and at the upper...portal of the adit, from sparse outcrops to the west and east, and from abundant float that is distributed...distributed along the gentle hillside for about 100 m west and about 50 m east of the dump. Because the general |  | | Journal (article/letter/editorial) | | Canada. Lithos, 26: 317-332. Spinel-sapphirine-corundum-rutileparageneses in metapelitic xenoliths from... In this paper, we describe sapphirine-spinel-corundum-rutile-bearing pelitic xenoliths in a lamprophyre...material ); no contacts with matrix quartz were seen. Corundum forms acicular, idiomorphic crystals up to 0.5...BucherNurminen, 1984); and (7) the Tamil Nadu area, India (Grew, 1982; Mohan, 1985). Endmember mineral compositions...1980); (2) Eastern Ghats, India (Lal et al., 1987); (3) the Sonapahar area, India (Lal et al., 1978); (4) |  | | Journal (article/letter/editorial) | | amphibolite facies in the East to granulite facies in the West. The increase of the metamorphic grade is indicated...cordierite-hercynite pairs from Rogaland, Nain Complex, Sonapahar and Amiata Complex (See text). All data of hercynite...circles:Nain Complex, Labrador; crosses : Sonapahar, India; solid squares: Rogaland, SW Norway (Henry...contains the assemblages garnet-cordierite-spinel, corundum-cordierite-spinel or cordierite-spinel. The metamorphic...the high-grade metamorphic terrain near Sonapahar, Assam, India. They suggest that chemical equilibrium |  | | Journal (article/letter/editorial) | | Namlekonda (Karimnagar), Andhra Pradesh, Southern India a D. Prakash & I. N. Sharma a a Banaras Hindu...Namlekonda (Karimnagar), Andhra Pradesh, Southern India, International Geology Review, 50:11, 1008-1021...Namlekonda (Karimnagar), Andhra Pradesh, Southern India D. PRAKASH1 AND I. N. SHARMA Department of Geology...Geology, Banaras Hindu University, Varanasi–221 005, India Downloaded by [Florida International University]...–spinel–cordierite–orthopyroxene –corundum–potash feldspar; (ii) corundum– chlorite–spinel–magnetite ± biotite–cordierite; |  | | Journal (article/letter/editorial) | | monophase sapphirine corona occur around spinel–corundum aggregates in monomineralic cordierite layers...assemblages for the discontinuous reactions spinel ? corundum ? cordierite ? sapphirine and sapphirine ? cordierite...Indian Institute of Technology, Kharagpur 721 302, India e-mail: abbhat55@yahoo.com Keywords Reaction texture...facies metapelites from the Eastern Ghats Belt of India were examined (Fig. 1). In one sample, sapphirine...sapphirine occurs as mono-phase corona around corundum–spinel aggregates in contact with polygonized cordierite |  | | Journal (article/letter/editorial) | | Banaras Hindu University, Varanasi, 221005, UP, India *Corresponding author, e-mail: das_kaushik@vsnl...taken from granulite samples from Eastern Ghats, India and sillimanite seeds were taken from high-grade...& Kurz, 1994) where sapphirine with coexisting corundum in highly oxidized metapelites has been reported...assemblage from two major regional granulite belts in India, namely, the Eastern Ghats belt and the Southern...Southern Granulite belt. (a) Eastern Ghats, India: Peak metamorphic temperatures have been estimated for some |  | | Journal (article/letter/editorial) | | metamorphosed to equally distinctive rocks rich in corundum and andalusite. The degree to which alteration...immediately west of a bridge over the Elands G.J. RETALLACK AND D.H. KRINSLEY River, 2.7 km west of the...stratigraphically equivalent Ongeluk Volcanics in the Griqualand West Basin have been dated by the Pb/Pb method as 2238_+90...geosol above the Ongeluk Basalt of the Griqualand West Basin (Wiggering and Beukes, 1990; Holland and Beukes...sedimentary of the Transvaal Iv::::1 and Grlqualand West rocks Supergroups " ~ eplcratonic sedimentary rocks |  | | Journal (article/letter/editorial) | | spinel-orthopyroxenite from southern Karnataka, India C. R. L. FRIEND Department of Geology, Oxford Polytechnic...Mysore, Manasagangotri, Mysore 570006, Karnataka, India Abstract Within amphibolite facies Peninsular gneisses...per-aluminous sapphirine, FMASH, spinel-orthopyroxenite, India, Sargur supracrustal rocks. Introduction THE widespread...different origins and ages in the southern part of India has been known for * Present address: Department...of Bangalore, Jnana Bharathi, Bangalore 560056, India. Mineralogical Magazine, June 1993, Vol. 57, pp |  | | Journal (article/letter/editorial) | | eastern India P.C. Bandopadhyay a , P.G. Eriksson b,∗ , R.J. Roberts b a b Geological Survey of India, Bhu-Bijnan...Bhavan, DK-6, Sector-II, Salt Lake, Kolkata 700091, India Department of Geology, University of Pretoria, Pretoria...Pyrophyllite Granite saprolith Basalt Geochemistry India a b s t r a c t We report on an inferred Paleoproterozoic...Singhbhum-Orissa craton near Keonjhargarh, Orissa, eastern India, which preserves vertic (Vertisol-like) features...Ga inferred paleosol from Keonjhargarh, eastern India, which apparently developed on Archean granite but |  | | Journal (article/letter/editorial) | | schistosity and high-temperature minerals such as corundum and sillimanite. More troublesome in the interpretation...et aI1960), and on the Indo-Gangetic Plains of India and Pakistan organic carbon is up to 2.68% (Murthy...hematite as the Pakistani paleosols are known in India, but they are mainly found on very old land surfaces...Indo-Gangetic alluvium of northern Pakistan and India (Sehgal & Stoops 1972, Courty & Federoff 1985, Courty...thickness decrease from north to south and east to west from sections where both tops and bottoms of overlying |  | OSANAI, Y., HAMAMOTO, T., MAISHIMA, O., KAGAMI, H. (1998) Sapphirine‐bearing granulites and related high‐temperature metamorphic rocks from the Higo metamorphic terrane, west‐central Kyushu, Japan. Journal of Metamorphic Geology, 16 (1) 53-66 doi:10.1111/j.1525-1314.1998.00064.x | Journal (article/letter/editorial) | | metamorphic rocks from the Higo metamorphic terrane, west-central Kyushu, Japan Y . O S A N A I 1 (e m a il...Japan A B S TR A C T The Higo metamorphic unit in west-central Kyushu island, southwest Japan is an imbricated...sapphirine– corundum–spinel–cordierite (2) corundum–spinel–cordierite (3) garnet–corundum–spinel–cordierite...ierite (4) garnet–spinel–gedrite–corundum, and (5) orthopyroxene–spinel–gedrite. These metamorphic rocks...intrusive rocks, characteristically containing corundum, spinel and other Al-rich ferromagnesian silicates |  | | Journal (article/letter/editorial) | | Sequential reaction textures in Archaean garnet-corundum-sapphirine granulites from the Central Zone of...(57% pyrope; Mg/(Mg + Fe) = 62) + sapphirine + corundum + gedrite+phlogopite+rutile. Late-M1 boron-free...kornerupine grew at the expense of garnet and corundum, and coexisted with garnet, sapphirine and gedrite...reactions in the FMASH multisystem sapphirine-garnet-corundum-spinelcordierite-gedrite-kornerupine, the facies-sequence...constant T assuming constant u(H,O). Exhumation of M1 corundum inclusions during A42 breakdown of kornerupine |  | | Journal (article/letter/editorial) | | orthopyroxene, spinel, anorthite, andesine, sapphirine and corundum. Textural relationships suggest that sapphirine...kyanite --* sapphirine + corundum, and probably also by a reaction between corundum, spinel and orthopyroxene... Introduction During field work in the Roan district in the westernmost part of Vestranden (Fig. 1)...comparatively rare assemblages with sapphirine+corundum were discovered in metabasites. This mineral-pair...Region (Griffin and Mork 1981). The Roan coastal district is a part of the Vestranden gneiss area which |  | | Book | | Crustal Evolution and Metallogeny in India Sanjib Chandra Sarkar Anupendu Gupta CAMBRID GE UNIVERSIT...Press 4381/4, Ansari Road, Daryaganj, Delhi 110002, India Published in the United States of America by Cambridge...University Press. First published 2012 Printed in India at ……….. A catalogue record for this publication...Sanjib Chandra. Crustal evolution and metallogeny in India / Sanjib Chandra Sarkar, Anupendu Gupta. p. cm....(hardback) 1. Mineralogy--India. 2. Metallogeny--India. 3. Geology--India. I. Gupta, Anupendu, 1942- |  | | Report (issue) | | .� ISSN 0254 - 0436 GEOLOGICAL SURVEY OF INDIA ' Special Publication No. 55\ \ . . . Natio...INDIA ��tSI SlCf)I�11 f1(9QI. 55 Special Publication...S . Krishnan Birth Centenary held at Calcutta, India on 1-2 November, 1998 *-1 VOLUME-l tqffif fHCfiI�...PUBLISHED BY ORDER OF THE GOVERNMENT OF INDIA .2000 (Q INDIA, GEOLOG ICAL SURVEY (2000) Editorial...as the Director of the Geologi' cal Survey of India i,,! 1954 succeeding Dr. WD. l%st (1945-51) (the |  | | Journal (article/letter/editorial) | | with cordierite, phlogopite, spinel, sillimanite, corundum, orthopyroxene, and gedrite in granulite facies...structures and intergrowths involving spinel, corundum, and sillimanite, pseudomorphing an earlier generation...effects of a later amphibolite fades imprint along the west coast have been stripped off. Cover rocks (Nama...sequence of paragneisses occurring in roughly east-west trending belts, set among voluminous granitic gneisses...varieties are unevenly clouded with opaque material. Corundum is conspicuous in K-feldspar- or phlogopite-rich |  | | Journal (article/letter/editorial) | | garnet + spine1 (alkremite), corundum + garnet (corganite) and corundum + garnet + spine1 (corgaspinite)...modal amounts of corundum. MAZZONE and HAGGERTY (1989) coined the terms corganite (corundum + garnet) and...and corgaspinite (corundum + garnet + spinel) for these assemblages which, although chemically similar...modal corundum or may consist of a spinel-absent bimineralic assemblage of garnet and corundum (corganite)...surface by the presence of light to dark blue corundum grains and the absence of spinel. The corgaspinites |  | | Journal (article/letter/editorial) | | calcite; cd, cordierite; cpx, clinopyroxene; crn, corundum; g, garnet; ilm, ilmenite; ksp, K-feldspar; mp...granulites . . . . . . . . . . . . . . 2.3.3. Corundum + quartz . . . . . . . . . . . . 2.3.4. Calc-silicates...Vietnam Eastern Ghats Province, India Palghat Cauvery Tectonic Zone, India Southern Granulite terrain (including...(including Madurai Block), India Kerala Khondalite Belt, India Highland Complex, Sri Lanka Warumpi Province...Namaqualand, South Africa Epupa Complex, Namibia Labwor Hills, Uganda In Ouzzal, Hoggar, Algeria 42 Semail Ophiolite |
|
