Datensatz

Zusammenfassung

Several heat-flow data from the seas of the Italian peninsula, originally scattered in several publications, are gathered in the Global Heat Flow Database (GHFD) Release 2023 (https://doi.org/10.5880/fidgeo.2021.014) and national files. Although data are accessible, it is intrinsically difficult to discern whether they are affected by deviations from purely conductive, steady-state heat transfer unless the original papers are carefully inspected. The superposition of different biases can contaminate the heat-flow values. Uncritically contouring can thus lead to misleading thermal patterns. Moreover, the uneven spatial distribution of heat-flow sites and the differences in measurement techniques may cause additional difficulties in the interpretations. Depending on the possible targets (e.g., calculation of crustal geotherms, modelling or characterisation of advective systems, evaluation of geothermal energy potential), ad hoc filtering should be applied to remove the different effects. Within the Global Heat Flow Data Assessment Project (2021-2025) framework, initiated by the International Heat Flow Commission (http://www.ihfc-iugg.org), we reviewed heat-flow data collected during several surveys since the 1960s. We checked the original publications to identify misplaced or forgotten data in the GHFD. The review was based on the newly adopted standard for reporting and storing heat-flow data. Data were critically reviewed, validated and corrected for terrain effects. New heat-flow data from deep wells were also inferred through a minimisation technique accounting for temperatures, radiogenic heat production and the thermal conductivity variation with depth. We obtained significant heat-flow estimates characterising the size and intensity of shallow and deep tectonic events that left a thermal signature in the seas surrounding the peninsula.