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The occurrence of phosphorites on the Calicut mount, off Kerala, Lakshadweep Sea, India<br />

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Title Statement The occurrence of phosphorites on the Calicut mount, off Kerala, Lakshadweep Sea, India<br />
 
Added Entry - Uncontrolled Name Gopakumar, B ; Marine and coastal survey division, GSI, Mangalore
Anil Kumar, A
Sardar, S K
 
Uncontrolled Index Term Authigenic precipitation, Calicut mount, Carbonate fluorapatite, Phosphorite
 
Summary, etc. A highly altered carbonate rock was recovered from the mount, off Calicut, Kerala. Bulk chemical analysis of the rock showed that it contains ~ 21 % P2O5. The rock consists of fine to coarse lithic and bio-clasts embedded in brown to the yellow coloured phosphatic matrix. Detailed SEM-EDS of the rock piece indicates micro-globular and nodular growth of phosphorite around calcite to form a core-rim structure, with P2O5 as high as 31.67 weight percentage. The X-ray elemental mapping carried out using EPMA indicates highest P2O5 (29.87 %) on the altered surfaces. Microstructural and geochemical analyses suggest authigenic/diagenetic precipitation of phosphorite on the carbonate rock.
 
Publication, Distribution, Etc. Indian Journal of Geo-Marine Sciences (IJMS)
2022-10-05 12:09:05
 
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http://op.niscair.res.in/index.php/IJMS/article/view/36310
 
Data Source Entry Indian Journal of Geo-Marine Sciences (IJMS); ##issue.vol## 50, ##issue.no## 07 (2021)
 
Language Note en