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Murugan, C.
- Phyllanthus rangachariarii - A New Species of Euphorbiaceae from Agasthiyamalai, India
Abstract Views :152 |
PDF Views:107
Authors
Affiliations
1 Botanical Survey of India, Southern Regional Circle, Coimbatore 641 003, Tamil Nadu, IN
1 Botanical Survey of India, Southern Regional Circle, Coimbatore 641 003, Tamil Nadu, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 50, No 1-4 (2008), Pagination: 201-203Abstract
No Abstract.- Mastixia euonymoides Prain (Cornaceae): An Addition to the Flora of Tamil Nadu
Abstract Views :140 |
PDF Views:89
Authors
C. Murugan
1,
J. V. Sudhakar
1
Affiliations
1 Botanical Survey of India, Southern Regional Centre, Coimbatore 641 003, IN
1 Botanical Survey of India, Southern Regional Centre, Coimbatore 641 003, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 50, No 1-4 (2008), Pagination: 204-204Abstract
No Abstract.- The Application of Hydrogeochemical Method in Uranium Exploration - A Case Study from Barabazar-Manbazar Area, Purulia District, West Bengal
Abstract Views :192 |
PDF Views:2
Authors
A. K. Dwivedi
1,
Joydip Sen
1,
C. Murugan
1,
G. Bairwa
1,
A. K. Bhatt
1,
P. V. Ramesh Babu
1,
S. A. Pandit
2
Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Jamshedpur-831002, IN
2 Atomic Minerals Directorate for Exploration and Research, Hyderabad-500016, IN
1 Atomic Minerals Directorate for Exploration and Research, Jamshedpur-831002, IN
2 Atomic Minerals Directorate for Exploration and Research, Hyderabad-500016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 72, No 4 (2008), Pagination: 561-570Abstract
Hydrogeochemical exploration were earned out over an area of 700 sq km in Barabazar-Manbazar area of Purulia district, West Bengal, in order to identify target areas for the uranium mineralization. Water samples were collected from 504 borewells in the Singhbhum Group meta-Sediments and Chhotanagpur Granite Gneissic Complex (CGGC) including South Purulia Shear Zone (SPSZ). For individual Iithological domains, univariate and multivariate statistical techniques were applied to the analytical data on 10 variables, i.e. U, Na+, K+ , Mg+2, Ca+2, SO4-2, HCO3, Cl-, conductivity and pH. Five hydro uranium anomalous zones withm CGGC were delineated at Raghunathpur, Tentla, Chepua-Dighi, Ban and Jitujon areas. However, distinct pattern of high uranium values along with uranium/Conductivity are observed only in Raghunathpur-Tentla and Chepua-Dighi areas in the proximal tectonized zones of SPSZ. Based on the distinctive hydrogeochemical attributes, and favourable geology and structure, the areas in the vicinity of Raghunathpur-Tentla and Chepua-Dighi in the northern proximal contact of SPSZ, are designated as potential target areas for detailed geological and geophysical exploration.Keywords
Hydrogeochemistry, Uranium, SPSZ, CGGC, Singhbhum Group, Purulia, West Bengal.- Geochemistry and Geochronology of A-Type Barabazar Granite: Implications on the Geodynamics of South Purulia Shear Zone, Singhbhum Craton, Eastern India
Abstract Views :206 |
PDF Views:0
Authors
A. K. Dwivedi
1,
U. K. Pandey
1,
C. Murugan
1,
A. K. Bhatt
2,
P. V. Ramesh Babu
1,
Mallikarjun Joshi
3
Affiliations
1 Atomic Minerals Directorate for Exploration and Research (AMD), Hyderabad - 500629, IN
2 Atomic Minerals Directorate for Exploration and Research (AMD), Jamshedpur - 831 002, IN
3 Banaras Hindu University, Varanasi - 221005, IN
1 Atomic Minerals Directorate for Exploration and Research (AMD), Hyderabad - 500629, IN
2 Atomic Minerals Directorate for Exploration and Research (AMD), Jamshedpur - 831 002, IN
3 Banaras Hindu University, Varanasi - 221005, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 77, No 6 (2011), Pagination: 527-538Abstract
The Barabazar granite, exposed at the northern margin of Singhbhum craton, Eastern India, occurs along the South Purulia Shear Zone (SPSZ) and is emplaced into the Palaeoproterozoic metapelites and felsic volcanics of Singhbhum Group. Geochemical, petrographical and geochronological studies on the Barabazar granite addressed in the work have wide implications on understanding the geodynamics of SPSZ during Palaeoproterozoic to Mesoproterozoic. Geochemically, Barabazar granite displays limited range of major oxides, alkali enrichment and highly fractionated features (SiO2 > 75%; Eu/Eu* = 0.16-0.33; enrichment of K, Rb, Th, U and Nb; depletion of Ba, Sr, P and Ti). It is predominantly peraluminous (molar Al2O3/CaO+Na2O+K2O (A/CNK) = 1.14-144) and contains abundant alkali feldspar, perthite, and minor plagioclase, biotite and accessory minerals. Geochemical and petrological data indicates that it is A-type granite, which formed in 'Within plate granite' tectonic set up. The Barabazar granite was emplaced at ca. 1771 Ma (Pb-Pb) in rift related environs and evolved by partial melting of stabilized lower/middle crust (initial 87Sr/86Sr = 0.7302 ± 0.0066 and μ1 = 8.5 ± 0.5). Subsequently, the shear zone (SPSZ) developed during the closure of the riftogenic basin and was reactivated during the Grenvillian orogeny (Ca. 900-1300 Ma), resulting in rehomogenisation of the strontium isotopes and thereby yielding younger whole-rock Rb-Sr isotope age of c. 971 Ma for the Barabazar granite. Probably during this tectonic event, the Singhbhum craton (Southern India Shield) would have finally juxtaposed with Northern Indian Shield along Central Indian Tectonic Zone (CITZ) during the global Grenvillian orogeny.Keywords
A-Type Barabazar Granite, Geochemistry, Geochronology, Grenvillian Orogeny, Singbhhum Craton, SPSZ, West Bengal.- Rediscovery and Lectotypification of Drypetes porteri (Putranjivaceae: Phyllanthoideae: Drypeteae), A Narrow Endemic and Endangered Species of the Western Ghats, India
Abstract Views :267 |
PDF Views:142
Authors
Affiliations
1 Botanical Survey of India, Southern Regional Centre, Lawley Road Post, TNAU Campus, Coimbatore – 641 003, Tamil Nadu, IN
1 Botanical Survey of India, Southern Regional Centre, Lawley Road Post, TNAU Campus, Coimbatore – 641 003, Tamil Nadu, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 60, No 1 (2018), Pagination: 10-12Abstract
Drypetes porteri (Gamble) Pax & K. Hoffm. is rediscovered after type collection (121 years) from type locality from Megamalai Wildlife Sanctuary, southern Western Ghats, Tamil Nadu, India. Lectotypification, brief description amended with fruit morphology and colour photographs are provided here for easy identification.Keywords
Drypetes, Endemic, Lectotype, Megamalai.References
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- CHAKRABARTY T, M. GANGOPADHYAY AND N.P. BALAKRISHNAN 1997. The genus Drypetes (Euphorbiaceae) in the Indian subcontinent. Journal of Economic and Taxonomic Botany 21 (2): 251–280.
- FORSTER P.I. 1997. A taxonomic revision of Drypetes Vahl. (Euphorbiaceae) in Australia Austrobaileya 4(4): 477−494.
- GAMBLE J.S. 1901. Hemicylea porteri, Euphorbiaceae, Tribe Phyllantheae. Hooker’s Icon. Pl. 28: t. 2701. 1901 GAMBLE J.S. 1925. Flora of the Presidency of Madras. Adlardand Sons, London, 2: 910.
- IUCN 2014. Standards and Petitions Subcommittee Guidelines for Using the IUCN Red List Categories and Criteria. Version 11. Prepared by the Standards and Petitions Subcommittee. www.iucnredlist.org/documents/RedListGuidelines.pdf (20-03-2018)
- KRISHNA G, K. KARTHIGEYAN, W. ARISDASON AND T. CHAKRABARTY 2017. A new species of Drypetes (Putranjivaceae/Euphorbiaceaes. S.l.) from West Bengal, India. Phytotaxa 319(3): 271–276. http://dx.doi.org/10.11646/phytotaxa.319.3
- LEVIN G.A. 2013. A synopsis of the New World species of Drypetes section Drypetes (Putranjivaceae) with asymmetrical fruits, including description of a new species. PhytotKeys 29: 75–87. https://doi.org/10.3897/ phytokeys.29.6004
- MATHEW S.P. AND T. CHAKRABARTY 1990. A new Drypetes Vahl (Euphorbiaceae) from South Andaman Island. Journal of Economic and Taxonomic Botany 14(3): 623–625.
- MCNEILL J, F.R. BARRIE, W.R. BUCK, V. DEMOULIN, W. GREUTER, D.L. HAWKSWORTH, P.S. HERENDEEN, S. KNAPP, K. MARHOLD, J. PRADO, W.F. PRUD’HOMME VAN REINE, G.F. SMITH, J.H. WIERSEMA AND N.J. TURLAND 2012. International Code of Nomenclature for algae, fungi, and plants. Melbourne Code. Adopted by the Eighteenth International Botanical Congress Melbourne, Australia, July 2011 [Regnum Vegetabile 154]. Gantner, Ruggell. 240.
- PAX F. AND K. HOFFMANN 1922. EuphorbiaceaePhyllanthoideae-Phyllantheae. In: Engler, A.G.H. & Prantl, (eds.), Das Pflanzenreich, IV, 147 XV (Heft 81). Wilhelm Engelmann, Berlin. 1–349
- VAHL M. 1807. Eclogaeamericanae, seu, scriptiones plantarum praesertim Americaemeridionalis, nondumcognitarum. Impensis Auctoris, Havniae. 49
- WEBSTER G.L. 1994. Synopsis of the genera and suprageneric taxa of Euphorbiaceae. Annals of the Missouri Botanical Garden. 81: 33–144.
- Spathoglottis affinis (Orchidaceae): A New Addition for The Flora of India
Abstract Views :259 |
PDF Views:110
Authors
Jeewan Singh Jalal
1,
Chaya Deori
2,
C. Murugan
1,
N. Odyuo
2,
B. S. Kholia
3,
David Lalsama Biate
2,
S. R. Talukdar
2,
Y. Mahesh
2
Affiliations
1 Botanical Survey of India, CGO Complex, 3rd MSO Building, Salt Lake City, Kolkata-700064, IN
2 Botanical Survey of India, Eastern Regional Centre, Lower New Colony, Laitumkhrah, Shillong-793003, IN
3 Botanical Survey of India, Northern Regional Centre, 192, Kaulagarh Road, Dehradun-248195, IN
1 Botanical Survey of India, CGO Complex, 3rd MSO Building, Salt Lake City, Kolkata-700064, IN
2 Botanical Survey of India, Eastern Regional Centre, Lower New Colony, Laitumkhrah, Shillong-793003, IN
3 Botanical Survey of India, Northern Regional Centre, 192, Kaulagarh Road, Dehradun-248195, IN