Record Details

Distribution of phosphorus and organic carbon in the nearshore sediments of Goa

NOPR - NISCAIR Online Periodicals Repository

View Archive Info
 
 
Field Value
 
Title Distribution of phosphorus and organic carbon in the nearshore sediments of Goa
 
Creator Rajamanickam, G. Victor
Setty, M. G. Anantha Padmanabha
 
Description 84-89
Samples collected from sediment water interface from the inner shelf region of Goa coast are examined for their phosphorus and organic carbon, which indicate the geochemical environment under which the present day deposits are laid down. As the colour, texture and lithology of the sediment varies considerably from north to south, so also the degree of concentration of organic carbon and phosphorus varies suggesting that they are in direct relationship with each other. Organic carbon is low (0.85%) at 5-10 m depth, but it is over 5% at 10-20 m depth with a few patchy areas of high and low values beyond and up to 50 m depth. Similarly, phosphorus is low (0-0.1%) at 0-10 m depth, but it is high (0.4-0.98%) at the mouths of the rivers. Both organic carbon and phosphorus are delineated into 2 zones (of high and low concentrations) along Marmugao Head (up to Tiracol river transect). Though organic carbon and phosphorus are related with each other, their variability fluctuates in terms of pre and postmonsoon periods in the region. The organic carbon has a proportional relationship with the clay fraction of the sediment. Higher concentration of phosphorus noticed in postmonsoon periods is considered to be due to a large supply of the terrigenous apatite brought in by the rivers; this is, in addition to contributing factors like organic productivity, upwelling and pollutants in the region. Since the sediment in the region falls within the zone of 0.5-5.0% P2O5, it can be considered to be 'phosphate bearing'.
 
Date 2017-01-04T06:17:51Z
2017-01-04T06:17:51Z
1973-12
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/39641
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.02(2) [December 1973]