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Native aluminium (spherules and particles) in the central Indian Basin sediments: Implications on the occurrence of hydrothermal events

DRS at CSIR-National Institute of Oceanography

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Title Native aluminium (spherules and particles) in the central Indian Basin sediments: Implications on the occurrence of hydrothermal events
 
Creator Iyer, S.D.
Mascarenhas-Pereira, M.B.L.
Nath, B.N.
 
Subject Native Aluminium
Central Indian Basin
Hydrothermal
 
Description We have sampled particles of native aluminium (Alº) in two sediment cores from the Central Indian Basin (CIB). The cores are geographically separated but are located at the base of two seamounts. The native Alº particles occurring as grains and spherules, have an average Al content of ~95% and are associated with volcanogenic-hydrothermal material. Morphologically and compositionally, the specimens are similar to those reported from the East Pacific Rise. After ruling out several processes for the presence of the native Alº, we hypothesize that during progressive melting of magma, a basaltic magma is produced which has high contents of reductants such as methane and hydrogen, and a low oxygen fugacity. During the upward migration of such magma, reduction to metallic aluminium and the formation of native Alº particles takes place.
 
Date 2007-06-22T18:32:41Z
2007-06-22T18:32:41Z
2007
 
Type Journal Article
 
Identifier Marine Geology, vol. 240(1-4), 177-184pp.
http://drs.nio.org/drs/handle/2264/621
 
Language en
 
Rights An edited version of this paper is published by Elsevier. Copyright Elsever [2007]
 
Format 561675 bytes
application/pdf
 
Publisher Elsevier