NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.34 [2005] >
IJMS Vol.34(3) [September 2005] >


Title: Interpretation of gravity data over the 85 ºE ridge and Afanasy Nikitin
Authors: Bansal, A.R.
Dimri, V.P.
Keywords: Gravity data
85 ºE Ridge
Afanasy Nikitin Seamount
Spectral method
Crustal thickness
Issue Date: Sep-2005
Publisher: CSIR
Abstract: The 85 ºE ridge is an enigmatic buried aseismic ridge having the peculiar negative gravity anomaly in the north and positive anomaly in the south. Different theories are proposed for the negative anomaly over the 85 ºE ridge. High-resolution two-dimensional satellite gravity data over 85 ºE ridge is interpreted using the spectral analysis method covering the area from 5ºS to 18 ºN. The area consists of the Afanasy Nikitin seamount, partially buried hills and the 85 ºE ridge. Twelve overlapping blocks of 3º3º are selected to calculate the depth of anomalous sources. The two layers of anomalous sources are observed for all blocks. The different depth values of causative sources are found for different portion of the 85 ºE ridge. The deeper depth values for each block are representing the crustal thickness. The maximum thickness of 25.6 km was found for block 10 covering the area between latitude 12 ºN to 15 ºN. The average crustal thickness decreases from north to south along 85º E ridge. The reason of negative free air gravity anomaly below the 85 ºE may be due to the depression in the Moho.
Page(s): 279-284
ISSN: 0379-5136
Source: IJMS Vol.34(3) [September 2005]

Files in This Item:

File Description SizeFormat
IJMS 34(3) 279-284.pdf688.17 kBAdobe PDFView/Open
 Current Page Visits: 486 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 637962 since 06-Feb-2009  Last updated on 15-Dec-2014Webmaster: nopr@niscair.res.in