A new report of serpentinites from Northern Central Indian Ridge (at 6 degrees S) - An implication for hydrothermal activity
IR@NIO: CSIR-National Institute Of Oceanography, Goa
View Archive Info| Field | Value | |
| Creator |
Ray, Dwijesh
Banerjee, R. Iyer, S.D. Mukhopadhyay, S. |
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| Date |
2009-01-28T05:12:11Z
2009-01-28T05:12:11Z 2008 |
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| Identifier |
Acta Geologica Sinica, vol. 82(6); 1213-1222
http://drs.nio.org/drs/handle/2264/2414 |
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| Description |
Abstract: Serpentinites from the inside corner high (6O38.5'SI 6S019.34'E) from the Northern Central Indian Ridge (NCIR) are comprised mainly of high Mg-rich lizardite and chrysotile pseudomorphs with varying morphologies. 'Meshrim', 'window', 'hourglass' and 'bastite' are the most common
textures displayed by both chrysotile and liuardite. Numerous chrysotile veins in association with cross cutting magnetite veins indicate an advanced stage of serpentinisation. The relatively high abundance of chrysotile and lizardite suggest their close association and formation at a temperature below 250°C.
Abundant 'mesh rim' and 'bastite' texture and variegated matrix reveal that the present serpentinites might have formed due to the interaction of harzburgite and seawater. Positive Eu anomaly (EuJEu* up
to +3.38), higher LaISm (up to 4.40) and NbLa (up to 6.34) ratios suggest substantial hydrothermal influence during the formation of the serpentinites.
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| Language |
en
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| Publisher |
Geological Society of China
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| Rights |
Copyright [2008]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
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| Subject |
serpentinite
sepentinisation hydrothermal alteration |
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| Title |
A new report of serpentinites from Northern Central Indian Ridge (at 6 degrees S) - An implication for hydrothermal activity
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| Type |
Journal Article
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