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Differential dissolution of biogenic carbonates: Implications of secretion at higher pH

DRS at CSIR-National Institute of Oceanography

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Field Value
 
Title Differential dissolution of biogenic carbonates: Implications of secretion at higher pH
 
Creator Saraswat, R.
 
Subject Globigerinoides ruber
foraminifera
Indian Ocean
breakage
 
Description A selective preferential dissolution of a few initial chambers of several specimens of calcareous planktic foraminifera Globigerinoides rubber has been noted in the surface sediments collected from the eastern Arabian Sea and northern Bay of Bengal. Based on a recent finding stating the capability of foraminifera to modulate the vacuolar seawater pH for easy secretion of calcite, it is postulated that these initial two-three chambers were formed at relatively higher pH conditions, inside the cyst during asexual reproduction. The secretion of chambers at relatively higher pH results in increased incorporation of magnesium into the calcareous test. This increased Mg carbonate probably renders the initial chambers more prone to dissolution. The findings have an implication for the application of G. ruber for paleoclimatic/paleoceanographic studies
 
Date 2011-03-07T05:49:11Z
2011-03-07T05:49:11Z
2010
 
Type Journal Article
 
Identifier Journal of the Palaeontological Society of India, vol.55(2); 2010; 65-68
http://drs.nio.org/drs/handle/2264/3794
 
Language en
 
Rights Copyright [2010]. 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 The Palaeontological Society of India