210Pb, 230Th, and 10Be in Central Indian Basin seamount sediments: Signatures of degassing and hydrothermal alteration of recent origin
IR@NIO: CSIR-National Institute Of Oceanography, Goa
View Archive Info| Field | Value | |
| Creator |
Nath, B.N.
Borole, D.V. Aldahan, A. Patil, S.K. Mascarenhas-Pereira, M.B.L. Possnert, G. Ericsson, T. Ramaswamy, V. Gupta, S.M. |
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| Date |
2008-05-26T12:09:32Z
2008-05-26T12:09:32Z 2008 |
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| Identifier |
Geophysical Research Letters, vol.35; L0960, doi:10.1029/2008GL033849
http://drs.nio.org/drs/handle/2264/1085 |
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| Description |
Isotopic (sup(210)Pb, sup(238)U-sup(230)Th, sup(10)Be), major and trace elements, and micromorphological and microchemical data, were used to identify recent (approx. 100 yrs) hydrothermal alteration of a greater than 200 kyr sedimentary record from the flank of a seamount in the Central Indian Basin located at the edge of the 75 degrees 30 minutes E fracture zone. Alteration effects are also reflected in 1) the depleted sedimentary organic carbon, 2) dissolution features of radiolarian skeletons, 3) the presence of altered minerals such as smectite and zeolites, and 4) distinctly different magnetic properties in the altered sediments. A predominant influence of neutral chloride type hydrothermal fluids is interpreted. This is the first report of recently occurring sediment alteration by shallow circulating sub-surface fluids along the Indian Ocean intra-plate seamount environment.
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| Language |
en
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| Publisher |
American Geophysical Union
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| Rights |
Copyright AGU[2008]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice that the rights are violated then the item would be withdrawn.
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| Subject |
trace elements
Central Indian Basin sedimentary organic carbon radiolarian skeletons |
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| Title |
210Pb, 230Th, and 10Be in Central Indian Basin seamount sediments: Signatures of degassing and hydrothermal alteration of recent origin
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| Type |
Journal Article
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