Earth tectonics as seen by GOCE - Enhanced satellite gravity gradient imaging

Area of Science:

• Geophysics
• Earth Science
• Satellite Gravimetry

Background:

• Satellite gravity gradients offer novel insights into Earth's subsurface structure.
• Seismic imaging provides a conventional method for studying Earth's lithosphere.

Purpose of the Study:

• To compare and integrate satellite gravity gradient data with seismic imaging for a more comprehensive understanding of Earth's structure.
• To highlight the unique perspectives offered by gravity gradient curvature analysis, especially in regions with limited seismic data.

Main Methods:

• Derivation of curvature components from satellite gravity gradients, utilizing data from the GOCE mission.
• Generation of curvature images to visualize Earth's structure.
• Comparative analysis of satellite gravity gradient maps and seismic imaging data.

Main Results:

• Satellite gravity gradient curvature maps provide a distinct view of Earth's structure compared to seismic imaging.
• Tectonic domains with similar seismic characteristics show variations in gravity gradient maps, indicating differences in lithospheric composition.
• This technique effectively reveals lithospheric heterogeneity, particularly in cratonic regions and unexplored areas like Antarctica.

Conclusions:

• Combining seismology and satellite gravity gradient imaging significantly enhances the understanding of Earth's lithospheric structure.
• Satellite gravity gradient curvature analysis is a powerful tool for mapping subsurface heterogeneity, especially in data-scarce regions.
• The study demonstrates the utility of GOCE data in unveiling complex geological features, such as those found in the Antarctic continent.