Detachment faults and pluton emplacement; Elba Island (Tyrrhenian Sea)

1995 ◽  
Vol 166 (4) ◽  
pp. 341-354 ◽  
Author(s):  
Jean-Marc Daniel ◽  
Laurent Jolivet
Keyword(s):  
Tyrrhenian Sea ◽  
Pluton Emplacement ◽  
Detachment Faults ◽  
Elba Island

The cooling, deformation and exhumation history of the late Miocene syn-tectonic Porto Azzurro pluton in a regional transfer zone (Elba Island, Italy)

2020 ◽  
Author(s):  
Andrea Brogi ◽  
Richard Spiess ◽  
Alfredo Caggianelli ◽  
Antonio Langone ◽  
Fin Stuart ◽  
...  
Keyword(s):  
Tectonic Setting ◽  
Northern Apennines ◽  
Contact Metamorphism ◽  
Pluton Emplacement ◽  
Vertical Permeability ◽  
Extensional Tectonic ◽  
History Of ◽  
Elba Island ◽  
Exhumation History ◽  
Transfer Zone

<p>In extensional tectonic settings, stretched terrains are often associated to lithosphere partial melting and widespread magmatism with plutons emplaced in the thinned crust. Emplacement of felsic magmas, at upper crustal levels, represents the final stage of the magma transfer from profound to shallow depth. In this framework, a mostly vertical permeability controls the magma uprising migration, as induced by dominant transcurrent crustal structures. Nevertheless, the interplay between extension and prolonged heat transfer favors uplift and progressive exhumation of the magmatic bodies, during their cooling.</p><p>In this presentation, we show an example of a felsic magmatic intrusion, the Porto Azzurro pluton (inner northern Apennines), emplaced in an extensional tectonic setting and mainly controlled by a regional transfer zone related to the opening of the Tyrrhenian Basin. This is exposed in the eastern Elba Island (Tuscan Archipelago). The hosting rocks of the Porto Azzurro pluton are mainly represented by micaschist, paragneiss and quartzite, affected by contact metamorphism and intense fluid circulation. We have analysed the structures that assisted the pluton emplacement and the ones that deformed the pluton itself during its cooling, from melt-present to brittle conditions, based on the integration among fieldwork, micro-structural, petrological and EBSD analyses. Furthermore, new U/Pb geochronological data on zircons and (U-Th)/He on apatite fission track refined the age of the pluton emplacement and its cooling, adding new data about the pluton history. Existing petrological analyses of the hosting rocks allowed us to better constrain the time-evolution of the thermal perturbation, permitting to frame the deformation and exhumation history of the Porto Azzurro monzogranite in the context of the Neogene extensional tectonics affecting the inner Northern Apennines.</p>

The structure and evolution of the Northern Tyrrhenian Sea

1996 ◽  
Vol 133 (1) ◽  
pp. 1-16 ◽  
Author(s):  
J. V. A. Keller ◽  
M. P. Coward
Keyword(s):  
Field Studies ◽  
Geometrical Model ◽  
Northern Apennines ◽  
Tyrrhenian Sea ◽  
Tectonic Model ◽  
Detachment Faults ◽  
Fold And Thrust Belt ◽  
Internal Zone ◽  
Extensional Faulting ◽  
Seismic Lines

AbstractField studies on the island of Elba and seismic lines from the Northern Tyrrhenian Sea, Italy, indicate that major extensional displacements were accommodated along east-dipping low-angle detachment faults. The rifting and subsidence in the Northern Tyrrhenian Sea basin have followed convergence and collision of the Corso-Sardinian block and the Apulian microplate. This collisional episode produced the Northern Apennines fold-and-thrust belt. Major extensional faults cut down-section through the stratigraphy and pre-existing west-dipping thrust faults. West-dipping thrusts can also be reactivated and form antithetic faults to the east-dipping detachments. Brittle deformation conditions predominated during the extensional phase. The geometry, internal structure and the fabrics (brittle and penetrative) associated with a well-exposed low-angle extensional detachment in Elba are presented in this paper. A geometrical model for the brittle extensional faulting is presented in which regional extension was accommodated on a system consisting of two sets of simultaneously active antithetic faults. The east-dipping detachment faults appear to have started at steeper angles, based on field and seismic observations, and rotated counter-clockwise to lower dips. Due to this rotation, and for space accommodation, antithetic west-dipping faults formed and rotated clockwise. A tectonic model is proposed whereby slowing of the convergence between Apulia and Corsica, as well as Tethys oceanic crust and Apulian crust subduction, led to the delamination of the Apulian litho-spheric mantle away from the crust. Accompanying asthenospheric upwelling and intrusion at the crust—mantle interface beneath the Tyrrhenian Sea caused late orogenic crustal stretching in the Northern Apennines internal zone.

The Elba Island: an intriguing geological puzzle in the Northern Tyrrhenian Sea

2013 ◽  
Vol 5 (2.1) ◽  
pp. 1-114 ◽  
Author(s):  
Enrico Pandeli ◽  
Gianfranco Principi ◽  
Valerio Bortolotti ◽  
Marco Benvenuti ◽  
Milvio Fazzuoli ◽  
...  
Keyword(s):  
Tyrrhenian Sea ◽  
Elba Island

A new sponge species of the genus Antho (Demospongiae, Microcionidae) from the Tyrrhenian deep Sea

Zootaxa ◽  
2019 ◽  
Vol 4674 (3) ◽  
pp. 397-400
Author(s):  
GABRIELE COSTA ◽  
MAURIZIO PANSINI ◽  
MARCO BERTOLINO
Keyword(s):  
Deep Sea ◽  
Sponge Species ◽  
Tyrrhenian Sea ◽  
Mediterranean Species ◽  
Additional Material ◽  
Océanographic Survey ◽  
Elba Island

The use of ROVs has greatly enhanced the possibility of obtaining information on living deep sponge communities (Bertolino et al. 2015). The aim of this work is to describe a new Mediterranean species, Antho (Plocamia) sarasiri sp. nov. (Microcionidae Carter, 1875), characterized by dumbbell spicules making up the framework of the choanosomal skeleton (Van Soest et al. 2013). Samples were collected by ROV during an oceanographic survey in September 2012 on board of the R/V ‘Astrea’ (ISPRA) in “Secca P.ta Fetovaia” (42°43’29.54”N 10° 9’31.64”E) (Elba Island, Tyrrhenian Sea) at 70 m depth. We compared our sample with additional material collected by Sarà & Siribelli (1960, 1962). 

Adephagan water beetles of Elba Island (Tuscany) (Coleoptera Haliplidae, Dytiscidae, Noteridae, Gyrinidae)

2006 ◽  
Vol 85 (1) ◽  
pp. 85 ◽  
Author(s):  
Konrad Dettner
Keyword(s):  
Tyrrhenian Sea ◽  
Water Beetles ◽  
Number Of Species ◽  
Elba Island ◽  
First Time ◽  
Personal Research

The author provides a survey of the Hydradephaga (51 species) of Elba Island (Tyrrhenian sea, Tuscany, Italy) based on literature and on personal research. The total number of species collected by the author during 1998-2006 is 39 (1,468 specimens: 1,272/196 adults/larvae). Fifteen species are new for the island: <em>Haliplus guttatus</em> (Haliplidae), <em>Liopterus haemorrhoidalis</em>, <em>Hygrotus impressopunctatus</em>, <em>Hydroporus jonicus jonicus</em>, <em>H. memnonius, H. discretus</em>, <em>Graptodytes bilineatus, G. granularis, Agabus guttatus guttatus, Ilybius pederzanii, Melanodytes pustulatus, Rhantus suturalis, Hydaticus leander, H. seminiger</em> and <em>Stictotarsus procerus</em> (Dytiscidae). This last species is also new for Tuscany. <em>Agabus</em> (“<em>Metronectes</em>”) <em>aubei</em>, a Tyrrhenian (Corsica and Elba) species, is recorded for the first time since 1963. For each species faunistic and zoogeographic data are provided and possible conservation aspects are discussed

scholarly journals Permeability and hydraulic conductivity of faulted micaschist in the eastern Elba Island exhumed geothermal system (Tyrrhenian sea, Italy): insights from Cala Stagnone

Geothermics ◽  
2017 ◽  
Vol 70 ◽  
pp. 125-145 ◽  
Author(s):  
Martina Zucchi ◽  
Andrea Brogi ◽  
Domenico Liotta ◽  
Valentina Rimondi ◽  
Giovanni Ruggieri ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Geothermal System ◽  
Tyrrhenian Sea ◽  
Elba Island

scholarly journals First record of Acanthurus chirurgus (Perciformes: Acanthuridae) in the Mediterranean Sea, with some distributional notes on Mediterranean Acanthuridae

2015 ◽  
Vol 16 (2) ◽  
pp. 427 ◽  
Author(s):  
J. LANGENECK ◽  
M. BOYER ◽  
P. G. De CECCO ◽  
C. LUCIANI ◽  
M. MARCELLI ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
First Record ◽  
Tyrrhenian Sea ◽  
Elba Island ◽  
The Mediterranean ◽  
First Time

The occurrence of the doctorfish Acanthurus chirurgus is reported for the first time in the Mediterranean Sea, off Elba Island, Tyrrhenian Sea (42.726667° N, 10.434444° E). This record is tentatively related to aquarium release. The occurrence of Acanthuridae in the Mediterranean Sea is briefly reviewed, and some distributional notes on Acanthurus coeruleus and Acanthurus monroviae in the Mediterranean are provided.

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