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dc.contributor.authorMascarenhas, A.
dc.date.accessioned2009-05-06T10:47:03Z
dc.date.available2009-05-06T10:47:03Z
dc.date.issued1993
dc.identifier.citationJournal of the Geological Society of India, Vol.42(4); 392-404p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/2844
dc.description.abstractThis article presents granulometric data of pelites (less than 40 microns) of mixed composition from a volcano-sedimentary environment. The sedigraph serves as an useful tool in the analyses of silt-clay fraction of marine sediments. A cumulative curve from 40 to 1 micron can be obtained in 20 minutes. Pelites analysed show wide variations in grain size characteristics with the median value oscillating between 22 and 3 microns. In general, two fine grain size facies, each showing significant variations, are deciphered. Parabolic facies represent coarse silts whereas logarithmic facies comprise medium to fine silts. The type of grain size curves largely depends on the abundance of carbonate and pyroclastic mineral content of individual pelites. As compared to total pelites, their decalcified fractions sometimes show a significant shift of the grain median towards finer sizes. The intricacies of grain size studies of pelites of mixed composition are described in this paper
dc.language.isoen
dc.publisherGeological Society of India
dc.rightsCopyright [1993]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subjectsediments
dc.subjectgranulometry
dc.subjectgrain size
dc.subjectsedimentary environments
dc.titleGranulometric analyses of pelites using a sedigraph: Examples from a Volcano-sedimentary environment
dc.typeJournal Article


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