3D Geothermal Modelling of the Mount Amiata Hydrothermal System in Italy

In this paper we build a subsurface model that helps in visualizing and understanding the structural framework, geology and their interactions with the Mt. Amiata geothermal system. Modelling in 3D provides the possibility to interpolate the geometry of structures and is an effective way of understanding geological features. The 3D modelling approach appears to be crucial for further progress in the reconstruction of the assessment of the geothermal model of Mt. Amiata. Furthermore, this model is used as the basis of a 3D numerical thermo-fluid-dynamic model of the existing reservoir(s). The integration between borehole data and numerical modelling results allows reconstructing the temperature distribution in the subsoil of the Mt. Amiata area.

[1]  P. Squarci,et al.  Deep temperatures and surface heat flow distribution , 2001 .

[2]  D. Pinti,et al.  Hybrid character and pre-eruptive events of Mt Amiata volcano (Italy) inferred from geochronological, petro-geochemical and isotopic data , 2009 .

[3]  I. Dini,et al.  Geological model of a young volcano-plutonic system: The geothermal region of Monte Amiata (Tuscany, Italy) , 1988 .

[4]  L. Holden,et al.  Stochastic Structural Modeling , 2003 .

[5]  A. Brogi,et al.  The structure of the Monte Amiata volcano-geothermal area (Northern Apennines, Italy): Neogene-Quaternary compression versus extension , 2008 .

[6]  S. Vinciguerra,et al.  Laboratory measurements of the physical properties of Triassic Evaporites from Central Italy and correlation with geophysical data , 2010 .

[7]  A. Brogi,et al.  Neogene extension in the Northern Apennines (Italy): insights from the southern part of the Mt. Amiata geothermal area , 2006 .

[8]  L. Muffler,et al.  Methods for regional assessment of geothermal resources , 1977 .

[9]  A. Brogi,et al.  Crustal structures in the geothermal areas of southern Tuscany (Italy): Insights from the CROP 18 deep seismic reflection lines , 2005 .

[10]  K. Pruess,et al.  TOUGH2 User's Guide Version 2 , 1999 .

[11]  U. Tinivella,et al.  Geofluid evidence from analysis of deep crustal seismic data (Southern Tuscany, Italy) , 2005 .

[12]  A. Brogi.  Seismic reflection and borehole logs as tools for tectonic and stratigraphical investigations; new geological data for the Tuscan Nappe exposed in the northeastern Mt. Amiata area (Northern Apennines, Italy) , 2004 .

[13]  FaustoBatini,et al.  Geological features of Larderello－Travale and Mt.Amiata geothermal areas （southern Tuscany, Italy） , 2003 .

[14]  G. Bertini,et al.  The sub-Ligurian and Ligurian units of the Mt. Amiata geothermal region (south-eastern tuscany) : new stratigraphic and tectonic data and insights into their relationships with the Tuscan Nappe , 2005 .

[15]  G. Vai,et al.  Anatomy of an orogen : the Apennines and adjacent Mediterranean basins , 2001 .

[16]  A. Calamai.  Geology, geophysics, and hydrology of the Monte Amiata geothermal fields , 1970 .

[17]  E. Pandeli,et al.  Structural features of the metamorphic Paleozoic-Triassic sequences in deep geothermal drillings of the Monte Amiata area (SE Tuscany, Italy) , 1991 .

[18]  G. Ranalli,et al.  Correlation between seismic reflectivity and rheology in extended lithosphere: southern Tuscany, inner Northern Apennines, Italy , 1999 .

[19]  G. Ranalli,et al.  Structural features of southern Tuscany and geological interpretation of the CROP 18 seismic Reflection Survey (Italy) , 2005 .

[20]  G. Caumon,et al.  Surface-Based 3D Modeling of Geological Structures , 2009 .

[21]  A. Brogi,et al.  Sb–Hg ore deposit distribution controlled by brittle structures: The case of the Selvena mining district (Monte Amiata, Tuscany, Italy) , 2011 .

[22]  P. Marinelli.  Genèse des magmas du volcanisme plio-quaternaire des Apennins , 1967 .

[23]  A. Manzella,et al.  Crustal models of the geothermal areas of southern Tuscany (Italy) , 1997 .

[24]  Carlo Cardellini,et al.  Carbon dioxide degassing and thermal energy release in the Monte Amiata volcanic-geothermal area (Italy) , 2009 .

[25]  G. Ranalli,et al.  Geothermal and rheological regime in the Po plain sector of Adria (Northern Italy) , 2012 .

[26]  P. Romagnoli,et al.  A Review of the Mt. Amiata Geothermal System (Italy) , 2010 .

[27]  A. Sbrana,et al.  Metamorphic consequences of Neogene thermal anomaly in the northern Apennines (Radicondoli-Travale area, Larderello geothermal field – Italy) , 2000 .

[28]  Olivier Kaufmann,et al.  3D geological modelling from boreholes, cross-sections and geological maps, application over former natural gas storages in coal mines , 2008, Comput. Geosci..

[29]  PETTER MOSTAD,et al.  STOCHASTIC STRUCTURAL MODELLING , 2002 .

[30]  L. Civetta,et al.  Source contamination and mantle heterogeneity in the genesis of Italian potassic and ultrapotassic volcanic rocks: Sr–Nd–Pb isotope data from Roman Province and Southern Tuscany , 2002 .