Geophysical Investigation of Lithosphere Structure Beneath Sri Lanka Using Surface and Internal Load Variations

H. M.I. Prasanna; Wu Chen; D. Gómez‐Ortiz

doi:10.1007/s00024-013-0767-6

Geophysical Investigation of Lithosphere Structure Beneath Sri Lanka Using Surface and Internal Load Variations

H. M.I. Prasanna, Wu Chen, D. Gómez‐Ortiz

Research output: Journal article publication › Journal article › Academic research › peer-review

1 Citation (Scopus)

Abstract

This paper describes a method for interpreting the lateral changes in the geological structure of the lithosphere by iteratively calculating the spatial variation of a bottom-to-top loading ratio. We use Forsyth’s coherence method, based on multi-taper spectral analysis on overlapping window areas. We discuss the geological findings and their comparison with existing geological interpretations for the Sri Lankan region. The low thickness of the elastic plate in the Sri Lankan region suggests a high geothermal gradient. The lithospheric geological structure beneath the Sri Lankan region is consistent with the main crustal units of Sri Lanka, which belong to different ancient plates. Together with interpretations based on metamorphic rock units, our findings support the existence of thrust contact in the central highlands of Sri Lanka.

Original language	English
Pages (from-to)	1951-1962
Number of pages	12
Journal	Pure and Applied Geophysics
Volume	171
Issue number	8
DOIs	https://doi.org/10.1007/s00024-013-0767-6
Publication status	Published - 1 Jan 2014

Keywords

Crustal structure
Earth structure
Gravity anomalies
Gravity inversion
Moho discontinuity

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology

More information

10.1007/s00024-013-0767-6

Cite this

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title = "Geophysical Investigation of Lithosphere Structure Beneath Sri Lanka Using Surface and Internal Load Variations",

abstract = "This paper describes a method for interpreting the lateral changes in the geological structure of the lithosphere by iteratively calculating the spatial variation of a bottom-to-top loading ratio. We use Forsyth{\textquoteright}s coherence method, based on multi-taper spectral analysis on overlapping window areas. We discuss the geological findings and their comparison with existing geological interpretations for the Sri Lankan region. The low thickness of the elastic plate in the Sri Lankan region suggests a high geothermal gradient. The lithospheric geological structure beneath the Sri Lankan region is consistent with the main crustal units of Sri Lanka, which belong to different ancient plates. Together with interpretations based on metamorphic rock units, our findings support the existence of thrust contact in the central highlands of Sri Lanka.",

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AB - This paper describes a method for interpreting the lateral changes in the geological structure of the lithosphere by iteratively calculating the spatial variation of a bottom-to-top loading ratio. We use Forsyth’s coherence method, based on multi-taper spectral analysis on overlapping window areas. We discuss the geological findings and their comparison with existing geological interpretations for the Sri Lankan region. The low thickness of the elastic plate in the Sri Lankan region suggests a high geothermal gradient. The lithospheric geological structure beneath the Sri Lankan region is consistent with the main crustal units of Sri Lanka, which belong to different ancient plates. Together with interpretations based on metamorphic rock units, our findings support the existence of thrust contact in the central highlands of Sri Lanka.

KW - Crustal structure

KW - Earth structure

KW - Gravity anomalies

KW - Gravity inversion

KW - Moho discontinuity

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DO - 10.1007/s00024-013-0767-6

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JO - Pure and Applied Geophysics

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Geophysical Investigation of Lithosphere Structure Beneath Sri Lanka Using Surface and Internal Load Variations

Abstract

Keywords

ASJC Scopus subject areas

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