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Mascarenhas, A.
- Distribution of Phosphorus and Phosphatisation along the Western Continental Margin of India
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Authors
Affiliations
1 National Institute of Oceanography, Dona Paula, Goa 40300, IN
1 National Institute of Oceanography, Dona Paula, Goa 40300, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 30, No 5 (1987), Pagination: 423-438Abstract
Phosphate content in the bulk sediments range from 0.02 to 2.17% and on carbonate free basis it varies from 0.03 to 6.57%. The partition studies indicate that contribution from the acid resistant detrital minerals (HCl insolubles) is negligible. In the inner shelf, the phosphorus is mainly associated with iron (as ferric-phosphate?) and organic carbon. In the outer shelf/slope its association with carbonate suggests its authigenic/diagenetic origin. This is also supported by X-ray diffraction studies wherein the apatite peak is revealed in some samples. In general, sympathetic relationship of phosphorus with organic carbon in the study region indicates genetic relationship between these two elements, which is an important condition for phosphatogenesis. Further, these studies suggest that the outershelf/slope region between Bombay and Quilon is the promising area for detailed exploration for phosphorite deposits.- Changing Sedimentary Environments During Pleistocene-Holocene in a Core from the Eastern Continental Margin of India
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Authors
V. Purnachandra Rao
1,
Ch. M. Rao
1,
A. Mascarenhas
1,
K. Mohan Rao
2,
N. P. C. Reddy
2,
H. C. Das
3
Affiliations
1 National Institute of Oceanography, Dona Paula 403 004, Goa, IN
2 National Institute of Oceanography, Regional Centre, 52, Kirlampudi, Layout, Visakhapatnam 530 023, IN
3 Oil India Limited, Duliajan, Assam 786 602, IN
1 National Institute of Oceanography, Dona Paula 403 004, Goa, IN
2 National Institute of Oceanography, Regional Centre, 52, Kirlampudi, Layout, Visakhapatnam 530 023, IN
3 Oil India Limited, Duliajan, Assam 786 602, IN