A potential phosphorite deposit on the continental margin off Chennai

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dc.contributor.author Rao, V.P.
dc.contributor.author Rao, K.M.
dc.contributor.author Vora, K.H.
dc.contributor.author Almeida, F.
dc.contributor.author Subramaniam, M.M.
dc.contributor.author Souza, C.G.A.
dc.date.accessioned 2008-02-22T05:31:27Z
dc.date.available 2008-02-22T05:31:27Z
dc.date.issued 1998
dc.identifier.citation Current Science, Vol.74(7); 574-577p.
dc.identifier.uri http://drs.nio.org/drs/handle/2264/968
dc.description.abstract The geochemistry and mineralogy of the potential phospharite deposits recovered from the continental margin off Chennai, Tamil Nadu (India) and their comparison with other offshore phosphorites is given. The phosphorites recovered are classified into four types as (1) light brown friable phosphorites (2) grey dense phosphorites (3) phosphorite sands and (4) phosphatized algal nodules/limestones. Major element composition of phosphorites indicate that the P@d2@@ O@d5@@ content is highest (31%) in phophorite grains (phosphorite sands) followed by friable phosphorites (27%) and dense phosphorites (21%) and least in algal nodules (9%). Carbonate fluorapatite and calcite are the major minerals in friable phosphorites, dense phosphorites and phosphorite sands. Quartz, feldspar and high magnesium calcite are the accessory minerals. EDAX (energy dispersive x-ray analysis) carried out for 9 elements on JEOL 840 SEM/EDAX, reveal that measurable S contents (0.9%) occur in only algal nodules.
dc.language.iso en
dc.publisher Current Science Association
dc.rights Copyright [1998]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
dc.subject continental margin
dc.subject phosphorites
dc.subject algal nodules
dc.title A potential phosphorite deposit on the continental margin off Chennai
dc.type Journal Article

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