The seismic characterization of the stepped Triassic Paleokarst topography from Loppa High to Hoop Basin, Norwegian Barents Sea
Data-integrative 3D lithospheric-scale models can provide a comprehensive and more realistic view of Earth’s complexity. Such models have the potential to answer not only tectonic-related questions, but also to set a solid basis for the study of geohazard-related applications. In this talk, I will showcase a workflow in which available geophysical data has been integrated into a geologically-consistent 3Dlithospheric model of the Caribbean region, as well as the tectonic implications once contrasted against observed gravity (vertical gravity gradients and free-air anomalies). For example, we unveiled for the first time high-density bodies in the upper mantle, interpreted as the fossil conduits of the plume which formed the CaribbeanLarge Igneous Plateau ~90 Ma.
This gravity-constrained 3D structural and density model is then used to compute a 3D steady-state thermal model, after defining lithology-constrained thermal parameters to each lithospheric layer. The thermal model together with observed seismicity allows us to explore the spatial variation of the crustal seismogenic thickness and the potential temperatures at which earthquakes likely nucleate in the study area. Lastly, I will present how the pressure and temperature distribution within the marine sediments are being used to explore the potential stability zones for marine hydrates in the Caribbean, considering the latest IPCC global warming scenarios.
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