Thermal signature of the lithosphere below sedimentary basins in extensional, compressive and transform settings

MAGDALENA SCHECK-WENDEROTH; BOTT, JUDITH; CACACE, MAURO; ANIKIEV, DENIS; MARÍA LAURA GÓMEZ DACAL; CAMERON SPOONER; ERSHAD GHOLAMREZAIE

Congreso; EGU General Assembly; 2020

T he configuration of the lithosphere below sedimentary basins varies in response to the basinformingmechanism, the lifetime of the causative stress fields and the lithological heterogeneityinherited from pre-basin tectonic events. Accordingly, the deep thermal configuration is a functionof the tectonic setting, the time since the thermal disturbance occurred and the internal heatsources within the lithosphere. We compare deep thermal configurations in different settingsbased on data-constrained 3D lithosphere-scale thermal models that consider both geological andgeophysical observations and physical processes of heat transfer. The results presented comefrom a varied range of tectonic settings including: (1) the extensional settings of the Upper RhineGraben and the East African Rift System, where we show that rifts can be hot for different reasons;(2) the North and South Atlantic passive margins, demonstrating that magma-rich passive marginscan be comparatively hot or cold depending on the thermo-tectonic age; (3) the Alps, where wefind that foreland basins are influenced by the conductive properties and heat-producing units ofthe adjacent orogen; and (4)the Sea of Marmara, along the westernmost sector of the NorthAnatolian Fault Zone, that suggest strike-slip basins may be thermally segmented.