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n-Alkanes in surficial sediments of Visakhapatnam harbour, east coast of India

DRS at CSIR-National Institute of Oceanography

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Title n-Alkanes in surficial sediments of Visakhapatnam harbour, east coast of India
 
Creator Punyu, V.R.
Harji, R.R.
Bhosle, N.B.
Sawant, S.S.
Venkat, K.
 
Subject pelagic sediments
organic carbon
lipids
saturated hydrocarbons
 
Description Surface sediments collected from 19 stations along Visakhapatnam harbour were analysed for organic carbon (OC), delta sup(13)C sub(oc), total lipids (TL), total hydrocarbon (THC), n-alkane concentration and composition. OC, delta sup(13)C sub(oc), TL and THC ranged from 0.6 percent to 7.6 percent, -29.3 to -23.8 ppt, 300 to 14,948 mu g g sup(-1) dw, and 0.2 to 2,277 mu g g sup(-1) dw, respectively. Predominance of even carbon numbers n-alkanes C12–C21 with carbon preference index (CPI) of less than 1 suggests major microbial influence. Fair abundance of odd carbon number n-alkanes in the range of C sub(15)–C sub(22) and C sub(23)–C sub(33) indicates some input from phytoplankton and terrestrial sources, respectively. Petrogenic input was evident from the presence of hopanes and steranes. The data suggest that organic matter (OM) sources varied spatially and were mostly derived from mixed source.
 
Date 2013-04-25T12:09:58Z
2013-04-25T12:09:58Z
2013
 
Type Journal Article
 
Identifier Journal of Earth System Science, vol.122(2); 2013; 467-477
http://drs.nio.org/drs/handle/2264/4292
 
Language en
 
Rights © Indian Academy of Sciences. 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.
 
Publisher Indian Academy of Sciences