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IJMS Vol.34(3) [September 2005] >


Title: Pteropod preservation profiles in seabed sediments off Middle Andaman Island in Andaman Sea
Authors: Bhattacharjee, D.
Keywords: Andaman Sea
Aragonite compensation depth
Dissolution indices
Pteropod preservation profile
Preservation index
Issue Date: Sep-2005
Publisher: CSIR
Abstract: Quantitative studies of the major microfauna from 19 gravity cores and 8 grab samples and semi-quantitative studies of 47 surficial sediments, collected between 191m and 2334 m water depths off Middle Andaman Island and around Barren Island shows a characteristic relation of the microfauna with the physiographic domains in the Andaman basin. Craggy domain of volcanic arc zone in Andaman Sea reveals a variation of pteropod preservation profile (PPP) in the seabed sediments. The PPP bears a direct relationship with the nature of sediment, quantity of pyroclastic materials and physiographic configuration of the region. The degree of preservation of the dissolution prone pteropods and its numerical abundance at various water depths in 27 surficial sediments are utilized to examine the PPP in the area. These parameter can be applied to examine and compare different pteropod preservation domains in other parts of Andaman Sea for oceanographic inferences.
Page(s): 259-266
ISSN: 0379-5136
Source: IJMS Vol.34(3) [September 2005]

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