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Authors
Affiliations
1 Center for Geoscience and Engineering, Anna University, Chennai - 600 025, IN
2 Department of Earth Sciences, University of Windsor, Windsor, Ontario, CA
3 Regional Geology Laboratory, Oil and Natural Gas Corporation Ltd , Chennai - 600 034, IN
4 Forward basin, ONGC, Tnpura Project, Badarghat Complex, Agarthala - 799 014, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 63, No 1 (2004), Pagination: 51-60
Abstract
Twenty-four Pleistocene-Holocene deepwater benthic foramimferal species were identified based upon taxonomic criteria from a 26 m core sample collected during Academik Aleksandr Sidorenko cruise. The quantitative data of benthic foraminifera) taxa is treated statistically using multi vanate (both factor and cluster) techniques to understand the relationship between species assemblages and environmental parameters. The temporal distribution of samples in cluster II closely coincides with the distribution of higher loading values of factor 1 Similar associations were identified for cluster III with factor 2 and cluster IV with factor 3. However the faunal relative abundances along with %. Total Organic Content (TOC) values broadly divides the core into two environmentally significant zones viz, Zone 1 (between 1322 6m and 1321 6 m) which is characterised by high abundance of Cassiduhna cannata followed by Pullenia bulloides and Hoeglundina elegans having positive relationship with low TOC values ranging from 0 12 to 1 14 and Zone 2 (between 1321 6m and 1320 1 m), which is characterised by high percentages of TOC values ranging from 1 32 to 2 52, whereas Buhmina aculeata shows maximum abundance followed by Bohvina robusta, Cibiadoides kullenbergi and Osangulana culter, suggesting that these species prefer high nutrient environment.
Keywords
Benthic Foraminifera, Pleistocene, Holocene, Tuticonn, Bay of Bengal.
