Contribution des Méthodes de Prospections Géothermique et Géophysiques à l’Etude des Champs Géothérmiques de Toscane — Italie

Mouton, Jordane

doi:10.1007/bf02596715

Cited by 14 publications

(3 citation statements)

References 2 publications

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“…This magmatic body, inferred by geophysical data, is a partially crystallised granitoid emplaced at about 6-7 km below sea-level (Batini et al 1986;Gianelli et al 1988;Marinelli et al 1993;Acocella 2000). A well-defined negative Bouguer anomaly (Mouton 1969;Gianelli et al 1988;Orlando et al 1994) (Fig. 21) supporting the occurrence of this magmatic body can be explained by the injection of subcrustal mafic magmas into the granitic intrusion (Van Bergen and Barton 1984;Van Bergen 1985).…”

Section: Extensional Features and Geothermal Resourcesmentioning

confidence: 89%

“…This intrusive body has been estimated to be characterised by a diameter of 25-30 and 45-50 km (Batini et al 1986;Gianelli et al 1988;Marinelli et al 1983;Acocella 2000). The pluton produces a well-defined gravity anomaly centred on the Monte Amiata volcano (Mouton 1969;Puxeddu 1984;Gianelli et al 1988;Orlando et al 1994).…”

Section: Tectonic and Stratigraphic Settingmentioning

confidence: 98%

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The structure of the Monte Amiata volcano-geothermal area (Northern Apennines, Italy): Neogene-Quaternary compression versus extension

Brogi

2007

Int J Earth Sci (Geol Rundsch)

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Section: Extensional Features and Geothermal Resourcesmentioning

confidence: 89%

Section: Tectonic and Stratigraphic Settingmentioning

confidence: 98%

The structure of the Monte Amiata volcano-geothermal area (Northern Apennines, Italy): Neogene-Quaternary compression versus extension

Brogi

2007

Int J Earth Sci (Geol Rundsch)

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“…During Pliocene-Pleistocene, the Monte Amiata area underwent to surface uplift (PASQUARÈ et alii, 1983;DALLMEYER & LIOTTA, 1998), that accounts for heat flow perturbation, reasonably induced by the emplacement of the Amiata magmatic body at mid-crustal level (about 6-7 km; BATINI et alii, 1986;GIANELLI et alii, 1988;MARINELLI et alii, 1993), presently determining a well-defined gravity anomaly (MOUTON, 1969;PUXEDDU, 1984;GIANELLI et alii, 1988;ORLANDO et alii, 1994).…”

Section: Geological Outlinementioning

confidence: 99%

The Tuscan Nappe structures in the Monte Amiata geothermal area (central Italy): a review

Brogi¹,

Capezzuoli²,

Liotta³

et al. 2015

IJG

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The present knowledge on the structures affecting the Tuscan Nappe in the Monte Amiata area is here presented, highlighting that the tectonic evolution of the area is incorporated in the inner Northern Apennines framework. In fact, field and subsurface data indicate that the Tuscan Nappe is internally characterized by tectonic doublings, occurred during the collisional stage. Subsequently, as well as in the whole southern Tuscany, Miocene extension determined the lateral segmentation of the Tuscan Nappe; in the Mt. Amiata area, it resulted in three isolated geological bodies, partly cropping out. During Pliocene, the Tuscan Nappe was cross-cut by normal to oblique faults which contributed to channel the hydrothermal fluids that gave rise to the Pleistocene Hg-Sb ore deposits and Present geothermal resources. As it regards the deformation ages, since the late Oligocene-Aquitanian Macigno Fm is involved in the thrusts, the internal stacking of the Tuscan Nappe is related to the post-Aquitanian and pre-Langhian time period, on the basis of the Langhian sediments deposited in an extensional setting and presently recognised underneath the sediments of the nearby Pliocene Radicofani extensional Basin. It is therefore concluded that the switch from compression to extension occurred in a time span encompassed between early Burdigalian and early Langhian.A. BROGI ET ALII Fig. 1 -(A) Tectono-stratigraphic columns illustrating the main features of the paleogeographic domains of inner Northern Apeninnes. The Ligurian units consist of remnants of Jurassic oceanic crust, its Jurassic-Cretaceous mainly clayey cover. The Sub-Ligurian unit is made up of Cretaceous-Oligocene turbidites, believed to belong to a transitional crust paleogeographic domain. These units were thrust eastward over the Tuscan Nappe and the Metamorphic Tuscan units derived from the Internal and External Tuscan Domains, respectively, during late Oligocene-early Miocene time-period. The Tuscan Nappe is made up of rocks ranging from late Triassic evaporite to a Jurassic carbonate platform, Cretaceous-Oligocene pelagic sediments and late Oligocene-early Miocene turbidite. The greenschist metamorphic rocks from the External Tuscan Domain include late Triassic Jurassic metacarbonate, Cretaceous-Oligocene calcschists and Oligocene-early Miocene metasandstone. The crystalline basement of inner and outer Tuscan Domains is characterized by middle-late Triassic rocks, mainly represented by quartzite (Verrucano Group, Auct.) and Paleozoic phyllite; (B) Evolutionary tectonic sketch model of inner Northern Apennines, illustrating the coexistence between extension and magmatism, during thinning of the lithosphere (after CARMIGNANI et alii, 1994, modified).

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Ore-Controlling Factors in the Hg-Sb Province of Southern Tuscany, Italy

Klemm¹,

Neumann²

1984

Syngenesis and Epigenesis in the Formation of Mineral Deposits

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Contribution des Méthodes de Prospections Géothermique et Géophysiques à l’Etude des Champs Géothérmiques de Toscane — Italie

Cited by 14 publications

References 2 publications

The structure of the Monte Amiata volcano-geothermal area (Northern Apennines, Italy): Neogene-Quaternary compression versus extension

The structure of the Monte Amiata volcano-geothermal area (Northern Apennines, Italy): Neogene-Quaternary compression versus extension

The Tuscan Nappe structures in the Monte Amiata geothermal area (central Italy): a review

Ore-Controlling Factors in the Hg-Sb Province of Southern Tuscany, Italy

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