Open Access
Subscription Access
Crustal Depth Estimation Over the Indian Lithospheric Plate using Satellite Geoid and a Gravimetric–Isostatic Model
Moho depth or simply, Moho, in general, describes the boundary between the earth’s crust and the mantle and is a very important geophysical parameter. It is also related to the earth’s crustal thickness at any point. Geoid and gravity anomalies derived from satellite altimetry are gradually gaining importance in marine geo-scientific investigations. However, satellite gravity technique is not working over land/continent. So, we need to develop technique like the VMM model which is equally working over land. In addition of generating crustal thickness, it also saves energy to generate Bouguer anomaly over land and ocean.
Keywords
Crustal Depth, Geoid, Gravity Anomaly, Lithospheric Plate, Satellite Altimetry.
User
Font Size
Information
- Nerem, R. S., Jekeli, C., Koblinisky, J. and Beckley, B. D., A preliminary evaluation of ocean topography from the TOPEX/POSEIDON mission. J. Geophys. Res., 1994, 99, 24565– 24583.
- Sandwell, D. T. and Smith, S., Marine gravity anomaly from Geosat and ERS 1 satellite altimetry. J. Geophys. Res., 1997, 102(B5), 10039–10054.
- Majumdar, T. J., Mohanty, K. K., Mishra, D. C. and Arora, K., Gravity image generation over the Indian subcontinent using NGRI/EGM96 and ERS-1 altimeter data. Curr. Sci., 2001, 80(4), 542–554.
- Majumdar, T. J. and Bhattacharyya, R., An atlas of very high resolution satellite geoid/gravity over the Indian offshore. SAC Technical Note No. SAC/RESIPA/MWRG/ESHD/TR-21/2004, p. 48.
- Haxby, F., Karner, G. D., La Brecque, J. L. and Weissel, J. K., Digital images of combined oceanic and continental data sets and their use in tectonic studies. EOS Trans. Am. Geophys. Union, 1983, 64, 995–1004.
- Ram Babu, H. V., Gravity image of India. Curr. Sci., 1999, 76, 1533–1535.
- Eshagh, M., Bagherbandi, M. and Sjoberg, L. E., A combined global Moho model based on seismic and gravimetric data. Acta Geod. Geophys. Hung., 2011, 46(1), 25–38; doi:10.1556/ AGeod.46.2011.1.3.
- Lemoine, F. G., et al., The development of the joint NASA GSFC and the National Imagery and Mapping Agency (NIMA) Geopotential model EGM96. NASA/GSFC Publ. No. NASA/TP-1998206861, 1998.
- Mahadevan, T. M., Deep continental structure of India: a review. Mem. Geol. Soc. India, 1994, 28, 569.
- NGRI Map Series, Gravity Map Series of India (1:5 million). National Geophysical Research Institute, Hyderabad, 1978, 1st edn.
- Verma, R. K. and Subrahmanyam, C., Gravity anomalies and the Indian lithosphere: review and analysis of existing gravity data. Tectonophysics, 1984, 105(1–4), 141–161.
- Pal, S. K., Narayan, S., Majumdar, T. J. and Kumar, U., Structural mapping over the 85°E ridge and surroundings using EIGEN6C4 high-resolution global combined gravity field model: an integrated approach. Mar. Geophys. Res., 2016, doi:10.1007/s11001-0169274-3.
- Thybo, H. et al., Moho: 100 years after Andrija Mohorovičić. Tectonophysics, 2013, 609, 1–8.
- Mechie, J. et al., The distribution of Moho depths beneath the Arabian plate and margins. Tectonophysics, 2013, 609, 234–249.
- Bagherbandi, M., MohoIso: a MATLAB program to determine crustal thickness by an isostatic and a global gravitational model. Comput. Geosci., 2012, 44, 177–183.
- Heiskanen, W. A. and Moritz, H., Physical Geodesy, W H Freeman and Co, San Francisco, USA, 1967, p. 364.
- Sjoberg, L. E., Solving Vening Meinesz–Moritz inverse problem in isostasy. Geophys. J. Int., 2009, 179(3), 1527–1536; doi:10.1111/j.1365-246X.2009.04397.x.
- Pavlis, N. et al., An earth gravitational model to degree 2160: EGM08. Presented at the 2008 General Assembly of the European Geosciences Union, Vienna, Austria, 13–18 April 2008.
- Rao, G. C. et al., Lithosphere structure and upper mantle characteristics below the Bay of Bengal. Geophys. J. Int., 2016, 206, 675–695.
Abstract Views: 354
PDF Views: 159