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Geomorphological and petrological observations along a segment of slow-spreading Carlsberg Ridge

DRS at CSIR-National Institute of Oceanography

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Title Geomorphological and petrological observations along a segment of slow-spreading Carlsberg Ridge
 
Creator Mudholkar, A.V.
Kodagali, V.N.
KameshRaju, K.A.
Valsangkar, A.B.
Ranade, G.
Ambre, N.V.
 
Subject Carlsberg Ridge
Indian plate
 
Description A 120-km-long section of the Carlsberg Ridge has been mapped with multi-beam bathymetry system (MBS). High-resolution bathymetric contour map generated with the MBS data shows well-defined axial valley bordered by steep valley walls and the presence of a ridge axial discontinuity in the southeast end of the survey area. This discontinuity represents the propagating ridge head present along the ridge axis and is being reported for the first time along an active ridge segment of the Carlsberg Ridge. The pseudo-side scan image reveals a well-sedimented axial valley. It is for the first time that various upper mantle (serpentinites and peridotites) and lower crustal rocks (gabbros) have been recovered from this part of the Carlsberg Ridge apart from the ridge basalts. The basaltic rocks are mostly fresh; however a few types of basalt exhibit alteration. Serpentinites and peridotites are almost totally altered and exhibit the stress they have undergone during and after the emplacement.
 
Date 2006-08-28T09:16:11Z
2006-08-28T09:16:11Z
2002
 
Type Journal Article
 
Identifier Current Science, vol.82(8), 982-989p.
http://drs.nio.org/drs/handle/2264/283
 
Language en
 
Format 545792 bytes
application/pdf
 
Publisher Indian Academy of Sciences