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Authors
Affiliations
1 National Institute of Oceanography, Dona-Paula, Goa - 403 004, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 47, No 3 (1996), Pagination: 339-354
Abstract
The percentage data of 47 radiolarian coarser taxonomic groups in the surface sediments from the central Indian Basin was subjected to cluster and factor analyses. The R-mode cluster analysis resulted in 3 dominant clusters which represent surface, subsurface and deep water dwelling radiolarian groups. The Q-mode factor analysis resulted into three dominant factors. The factor-1 is characterized by Pyloniids group dominating the southwestern part with higher salinity (>34.5/ppt), low sea surface temperature <27°C) and high potential primary productivity (>0.2 mgC/m3/h) during the southwest monsoon. The factor-2 is characterized by Spongodiscids group dominating the northeastern part with lower salinity <34.5/ppt). warmer SST (>28°C), and poor potential primary productivity <0.2 mgC/m3/h) during the southwest monsoon. The factor-3 is characterized by Euchitoniids group dominating a transitional area between the two factors.
Keywords
Micropaleontology, Radiolaria, Statistical Analyses, Physical Oceanography, Paleoclimate, Central Indian Basin.
