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Mapping structural features in the Aravalli-Delhi Fold Belt, NW India using integration of remote sensing (ASTER, Landsat, ALOS PALSAR) and gravity data.

Satyakumar AV, Gaur S, Ashok J.

ADVANCES IN SPACE RESEARCH

https://doi.org/10.1016/j.asr.2026.05.065 

An integrated analysis of the Aravalli-Delhi Fold Belt using ASTER, Landsat, ALOS PALSAR, and gravity data delineates principal NE-SW tectonic trends alongside minor E-W and N-S structural features that closely correlate with known base metal mineralization zones. Optical and SAR data reveal a dominant NE-SW structural fabric, with L-band ALOS PALSAR backscatter images highlighting tectonic lineaments and deep seated discontinuities not always visible in standard optical or DEM datasets. Gravity gradient analysis, regional-residual anomalies, and derivative mapping correlate well. Extracted lineaments show strong spatial overlap with regional alteration and base metal mineralization zones, proving that fluid migration and ore localization are structurally controlled.

Fig: Integration of faults, lineaments, shear zones, and surface expressions, along with mineralogical zones of the study region from remote sensing and gravity data.

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