What question did this study set out to answer?

To develop and validate a two-dimensional laterally constrained inversion scheme with sharp boundaries for continuous resistivity data in quasi-layered sedimentary environments.

January 1, 2004Geophysics

Layered and laterally constrained 2D inversion of resistivity data

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To develop and validate a two-dimensional laterally constrained inversion scheme with sharp boundaries for continuous resistivity data in quasi-layered sedimentary environments.
Formulated a 2D inversion framework that solves all continuous resistivity soundings as a unified system, regularizing interface depths, layer thicknesses, and resistivities via lateral constraints.
Incorporated a priori geological data and full sensitivity analysis across the model profile, allowing constraints to propagate parameter information between neighboring measurement sites.
Evaluated the inversion algorithm using a synthetic quasi-layered benchmark model and field continuous vertical electrical sounding data collected over bedrock in Sweden.
Synthetic modeling confirmed that the 2D laterally constrained inversion resolved sharp layer boundaries, whereas traditional 2D smooth minimum-structure inversion produced diffuse transitions that obscured layer edges.
Field application in Sweden successfully mapped a till layer overlying the bedrock that was completely missed in the traditional minimum-structure inversion.
The laterally constrained scheme clearly resolved the depth to the bedrock surface across the majority of the survey profile, outperforming smooth inversion models.

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Implication

Methodological study reveals improved delineation of geological layer boundaries and bedrock depth using laterally constrained resistivity inversion, highlighting superior resolution over smooth...

Cite This Study

Auken et al. (2004) studied this question.

synapsesocial.com/papers/69dba3fd5b363cdf1c835b6b https://doi.org/10.1190/1.1759461

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Implication

Methodological study reveals improved delineation of geological layer boundaries and bedrock depth using laterally constrained resistivity inversion, highlighting superior resolution over smooth...

Layered and laterally constrained 2D inversion of resistivity data

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Implication

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Layered and laterally constrained 2D inversion of resistivity data

Key Points

Discussion

Implication

Cite This Study

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