Equbamariam, Yemane Kelemework (2021) Thermal Modeling of Southern Italy with Heat flow, Gravity and Magnetic Constraints. [Tesi di dottorato]
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| Item Type: | Tesi di dottorato |
|---|---|
| Resource language: | English |
| Title: | Thermal Modeling of Southern Italy with Heat flow, Gravity and Magnetic Constraints |
| Creators: | Creators Email Equbamariam, Yemane Kelemework yemanekelemework.equbamariam@unina.it |
| Date: | 17 May 2021 |
| Institution: | Università degli Studi di Napoli Federico II |
| Department: | Scienze della Terra, dell'Ambiente e delle Risorse |
| Dottorato: | Scienze della Terra, dell'ambiente e delle risorse |
| Ciclo di dottorato: | 33 |
| Coordinatore del Corso di dottorato: | nome email Fedi, Maurizio fedi@unina.it |
| Tutor: | nome email Fedi, Maurizio UNSPECIFIED Nicola, Pajola UNSPECIFIED |
| Date: | 17 May 2021 |
| Keywords: | Potential fields, Spectral analysis, Curie isotherm, Crustal structure, Heat flow, Thermal modeling, Southern Italy |
| Settori scientifico-disciplinari del MIUR: | Area 04 - Scienze della terra > GEO/11 - Geofisica applicata |
| Date Deposited: | 23 May 2021 10:56 |
| Last Modified: | 07 Jun 2023 10:38 |
| URI: | http://www.fedoa.unina.it/id/eprint/13793 |
Collection description
The estimation of subsurface temperature distributions is an important parameter for geothermal exploration. The thermal structure can be approximated by assuming either the steady-state or transient state solution of the heat conduction equation. The solution requires boundary values to calculate the temperature distribution within the crust and the lithospheric mantle. Such calculations are constrained primarily by surface heat flow and/or temperature measurements and the associated distribution of thermal parameters (thermal conductivity and heat production) within the crust and the lithospheric mantle. Data on near-surface heat flow and temperature are based on measurements in boreholes. Although heat flow and temperature data are considered the most reliable for estimating temperature distributions, their limited depth and scarcity may not be enough in inferring deep thermal gradients. In this study, instead, the results of the Curie isotherm model estimated from magnetic data used as a constraint to map the subsurface temperature distributions. In particular, the temperature at the Curie depth points (580oC) and surface temperature were imposed as Dirichlet boundary conditions for the bottom and top of the model, whereas the sides of the model were marked by a zero-heat flux (Neumann) boundary condition. Other essential information comes from the crustal structure model (crystalline basement and Moho depth), surface heat flow, controlled-source seismic profiles, magnetotellurics, and measurements of crustal radiogenic heat production and thermal conductivity within the subsurface layers. The integrated modeling approach and interpretation of the thermal model and estimated Curie temperature isotherm model, together with gravity, heat flow, geological model, and well log data may allow identifying areas of higher temperature and heat flow, identify potential interest for geothermal exploration, locate aquifers, and outline a production field.
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