How to differentiate between mud and salt diapir using seismic data?
Look at the base of the mobile unit, salts are underlain by a negative polarity reflector, whilst mud has lower velocity than underlying material and is bounded at its base by a possitive polarity reflector.
On this topic, you can inspect any of our papers on shale diapirs; e.g.,
) Proposal for a mechanical model of mobile shales | Scientific Reports (nature.com) - 2021
) Shale transformations and physical properties—Implications for seismic expression of mobile shales | Earth-Science Reviews - 2021
) Piercement mechanisms for mobile shales | Basin Research - 2021
) Extensional deformation of a shale‐dominated delta: Tarakan Basin, offshore Indonesia | Basin Research - 2023
) Mud volcanoes guided by thrusting in compressional settings | Geology - 2023
You could send me the section line and I could provide my interpretation. Maroua El Fessi .
One of the best ways I identify them is, velocity pull-ups? Yes=salt, No=mud. Top of diapir structure? Low-impedance=mud, high-amplitude=salt. Conical shape? Yes=mud, No=salt. Be aware, there are always exceptions and not always the case.
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