The Tyrrhenian margin of Central Italy underwent extension during
Pliocene and Quaternary. Extension occurred mainly through NW-SE
normal faults, bordering a sequence of Plio-Quaternary basins. These
basins are offset by coeval NE-SW faults, which show strike-slip
and normal motions and have been interpreted as transfer faults.
Plio-Quaternary volcanic activity along the margin occurred along
a NW-SE belt, systematically in correspondence with NE-SW transverse
systems. The Campi Flegrei Volcanic District (CFVD), on the Southern
Tyrrhenian margin, consists of an active NE-SW volcanic ridge developed
along NE-SW fractures. We performed a structural field analysis with
analogue and mechanical models to investigate the role of transverse
structures upon volcanism at Campi Flegrei. Field analysis at Campi
Flegrei recognized NE-SW and, to a lesser extent, coeval NW-SE active
fractures. Analogue experiments have simulated the development of
transfer fault systems in brittle extensional domains. The experiments
show that subvertical transfer faults connect offset adjacent normal
faults dipping 60 deg. The mechanical model is based on the stress
equations in uniaxial lithostatic conditions and absence of regional
stresses. It shows how pre-existing subvertical fractures require
the smallest magmatic pressures to be penetrated. For a given magmatic
pressure, subvertical fractures might be penetrated more deeply,
tapping more easily primitive magmas. These results suggest that
the CFVD is located along a NE-SW transfer zone connecting NW-SE
regional normal faults. Volcanic activity along such NE-SW trend
would be induced by the subvertical dip of the transfer faults. The
subvertical dip of transfer faults also suggests an explanation for
the emission of the more primitive products along NE-SW systems at
Campi Flegrei. These considerations find a wider application on the
remaining volcanic districts of the margin, located in the same overall
structural setting.
%0 Journal Article
%1 acocella_etal:1999
%A Acocella, V.
%A Salvini, F.
%A Funiciello, R.
%A Faccenna, C.
%D 1999
%J Journal of Volcanology and Geothermal Research
%K
%N 2-4
%P 123--139
%R 10.1016/S0377-0273(99)00032-3
%T The role of transfer structures on volcanic activity at Campi Flegrei
(Southern Italy)
%U http://dx.doi.org/10.1016/S0377-0273(99)00032-3
%V 91
%X The Tyrrhenian margin of Central Italy underwent extension during
Pliocene and Quaternary. Extension occurred mainly through NW-SE
normal faults, bordering a sequence of Plio-Quaternary basins. These
basins are offset by coeval NE-SW faults, which show strike-slip
and normal motions and have been interpreted as transfer faults.
Plio-Quaternary volcanic activity along the margin occurred along
a NW-SE belt, systematically in correspondence with NE-SW transverse
systems. The Campi Flegrei Volcanic District (CFVD), on the Southern
Tyrrhenian margin, consists of an active NE-SW volcanic ridge developed
along NE-SW fractures. We performed a structural field analysis with
analogue and mechanical models to investigate the role of transverse
structures upon volcanism at Campi Flegrei. Field analysis at Campi
Flegrei recognized NE-SW and, to a lesser extent, coeval NW-SE active
fractures. Analogue experiments have simulated the development of
transfer fault systems in brittle extensional domains. The experiments
show that subvertical transfer faults connect offset adjacent normal
faults dipping 60 deg. The mechanical model is based on the stress
equations in uniaxial lithostatic conditions and absence of regional
stresses. It shows how pre-existing subvertical fractures require
the smallest magmatic pressures to be penetrated. For a given magmatic
pressure, subvertical fractures might be penetrated more deeply,
tapping more easily primitive magmas. These results suggest that
the CFVD is located along a NE-SW transfer zone connecting NW-SE
regional normal faults. Volcanic activity along such NE-SW trend
would be induced by the subvertical dip of the transfer faults. The
subvertical dip of transfer faults also suggests an explanation for
the emission of the more primitive products along NE-SW systems at
Campi Flegrei. These considerations find a wider application on the
remaining volcanic districts of the margin, located in the same overall
structural setting.
@article{acocella_etal:1999,
abstract = {The Tyrrhenian margin of Central Italy underwent extension during
Pliocene and Quaternary. Extension occurred mainly through NW-SE
normal faults, bordering a sequence of Plio-Quaternary basins. These
basins are offset by coeval NE-SW faults, which show strike-slip
and normal motions and have been interpreted as transfer faults.
Plio-Quaternary volcanic activity along the margin occurred along
a NW-SE belt, systematically in correspondence with NE-SW transverse
systems. The Campi Flegrei Volcanic District (CFVD), on the Southern
Tyrrhenian margin, consists of an active NE-SW volcanic ridge developed
along NE-SW fractures. We performed a structural field analysis with
analogue and mechanical models to investigate the role of transverse
structures upon volcanism at Campi Flegrei. Field analysis at Campi
Flegrei recognized NE-SW and, to a lesser extent, coeval NW-SE active
fractures. Analogue experiments have simulated the development of
transfer fault systems in brittle extensional domains. The experiments
show that subvertical transfer faults connect offset adjacent normal
faults dipping 60 deg. The mechanical model is based on the stress
equations in uniaxial lithostatic conditions and absence of regional
stresses. It shows how pre-existing subvertical fractures require
the smallest magmatic pressures to be penetrated. For a given magmatic
pressure, subvertical fractures might be penetrated more deeply,
tapping more easily primitive magmas. These results suggest that
the CFVD is located along a NE-SW transfer zone connecting NW-SE
regional normal faults. Volcanic activity along such NE-SW trend
would be induced by the subvertical dip of the transfer faults. The
subvertical dip of transfer faults also suggests an explanation for
the emission of the more primitive products along NE-SW systems at
Campi Flegrei. These considerations find a wider application on the
remaining volcanic districts of the margin, located in the same overall
structural setting.},
added-at = {2012-09-01T13:08:21.000+0200},
author = {Acocella, V. and Salvini, F. and Funiciello, R. and Faccenna, C.},
biburl = {https://www.bibsonomy.org/bibtex/2f9ab5d606e60f896014f59a103440816/nilsma},
doi = {10.1016/S0377-0273(99)00032-3},
interhash = {bbd06fe4afe9d2c412c9985bc9c22a37},
intrahash = {f9ab5d606e60f896014f59a103440816},
issn = {03770273},
journal = {Journal of Volcanology and Geothermal Research},
keywords = {},
month = aug,
number = {2-4},
pages = {123--139},
timestamp = {2021-02-09T13:27:55.000+0100},
title = {The role of transfer structures on volcanic activity at Campi Flegrei
(Southern Italy)},
url = {http://dx.doi.org/10.1016/S0377-0273(99)00032-3},
volume = 91,
year = 1999
}