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dc.contributor.authorNair, R.R.
dc.date.accessioned1995-05-20T10:01:09Z
dc.date.accessioned2017-09-29T13:48:25Z
dc.date.available1995-05-20T10:01:09Z
dc.date.available2017-09-29T13:48:25Z
dc.date.issued1985
dc.identifier.citationMahasagar, vol.18; 1985; 273-279
dc.identifier.issn0542-0938
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/6329
dc.description.abstractSeventeen samples collected during different cruises of RV Gaveshani, were analysed by X-Ray diffractometer for apatite. These samples consists of algal and oolitic limestones and were recovered from depths ranging from 70 to 150 m on the western continental shelf from Saurashtra to Kerala. Prominent apatite peak was present only in the algal limestones off Goa. These occur as nodules and are similar in appearence to rhodoliths. Minerals present, in order of abundance, are high-magnesium calcite, francolite (carbonate flourapatite), quartz, feldspar and aragonite. P2 O5 concentration varies between 0.8% and 10.8% indicating a wide variation in chemical composition with the area. Age determined by the radiocarbon method is 11,040 years. It appears that these phosphorites were formed by diagenesis and the enrichment of phosphate in these limestones might be related to the physico-chemical activity of microorganism that built the algal mat
dc.languageen
dc.publisherIndian Association for Limnology and Oceanography
dc.relation.ispartofMahasagar
dc.relation.isreferencedbyNON-SCI
dc.subjectAquatic Non-Resources
dc.subject.otherradiocarbon dating
dc.subject.otherminerals
dc.subject.othercontinental shelves
dc.subject.othercontinental margins
dc.subject.otherphosphorite
dc.subject.otherholocene
dc.subject.otherISW, India
dc.titleHolocene phosphorites of the western continental margin of India
dc.typeJournal Article


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