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The occurrence of phosphorites on the Calicut mount, off Kerala, Lakshadweep Sea, India
NOPR - NISCAIR Online Periodicals Repository
View Archive Info| Field | Value | |
| Title |
The occurrence of phosphorites on the Calicut mount, off Kerala, Lakshadweep Sea, India
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| Creator |
Gopakumar, B
Kumar, A Anil Sardar, S K |
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| Subject |
Authigenic precipitation
Calicut mount Carbonate fluorapatite Phosphorite |
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| Description |
566-573
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. |
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| Date |
2021-08-24T06:17:38Z
2021-08-24T06:17:38Z 2021-07 |
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| Type |
Article
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| Identifier |
2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscair.res.in/handle/123456789/57949 |
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| Language |
en
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| Publisher |
NIScPR-CSIR, India
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| Source |
IJMS Vol.50(07) [July 2021]
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