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Paropkari, A. L.
- Electron Microscopic Studies of Clay Minerals from Three Bauxite Profiles
Abstract Views :169 |
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Authors
Affiliations
1 Geology Section, Indian Institute of Technology, Bombay 400076, IN
2 National Institute of Oceanography, Goa, IN
1 Geology Section, Indian Institute of Technology, Bombay 400076, IN
2 National Institute of Oceanography, Goa, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 21, No 5 (1980), Pagination: 252-254Abstract
Laboratory studies of three bauxitic profiles from Maharashtra and Tamil Nadu suggest that plagioclase feldspar alters to gibbsite via halloysite and not from kaolinite. The alteration characteristics of feldspars and the morphological aspects of clays leading to the genesis of bauxites were studied under electron microscope.- Distribution of Phosphate in Sediments of Gulf of Kutch
Abstract Views :184 |
PDF Views:129
Authors
Affiliations
1 National Institute of Oceanography, Dona Paula 403004, Goa, IN
1 National Institute of Oceanography, Dona Paula 403004, Goa, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 22, No 5 (1981), Pagination: 243-246Abstract
Total phosphate in the sediments ranges from 0.15 to 0.29% in the bulk samples and from 0.09 to 0.23% in the acid soluble fractions of the samples. There was no appreciable variation in the phosphate within the Gulf and no significant relation was observed between phosphate content and texture of the sediments. Invariably higher concentrations of phosphate were associated with the acid soluble fractions as compared to the acid insoluble fractions. The contributions made by the acid insoluble fractions to the phosphate concentration in the bulk samples was probably through the detrital minerals with which it might be associated, while the contributions made by the acid soluble fraction was probably in the form of adsorbed phosphate than in association with the carbonate phase.- Distribution of Phosphorus and Phosphatisation along the Western Continental Margin of India
Abstract Views :160 |
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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.- A Note on Geochemistry of Surface Sediments from Krishna-Godavari Basin, East Coast of India
Abstract Views :173 |
PDF Views:2
Authors
J. N. Pattan
1,
G. Pratibhan
2,
C. Prakesh Babu
2,
N. H. Khadge
1,
A. L. Paropkari
2,
V. N. Kodagali
1
Affiliations
1 National Institute of Oceanography, Dona Paula-403004, Goa, IN
2 National Institute of Oceanography, Dona Paula -403004, Goa, IN
1 National Institute of Oceanography, Dona Paula-403004, Goa, IN
2 National Institute of Oceanography, Dona Paula -403004, Goa, IN