Publication Date:
2020-05-28
Description:
The Campi Flegrei caldera is a restless, nested structure resulting from two major collapses related to the Campanian
Ignimbrite 37,000 years BP. and the Neapolitan Yellow Tuff 12,000 years BP. eruptions, respectively. Detailed
stratigraphical, structural, volcanological and 14C AMS. geochronological studies, devoted to the reconstruction of the
volcanic and deformational history of the Campi Flegrei caldera in the past 12,000 years have been carried out. The results
of these studies show that in this time span, intense both volcanic and volcano-tectonic activity was confined inside the
Neapolitan Yellow Tuff caldera. Volcanism was concentrated in epochs of intense activity, alternating to periods of
quiescence. The I epoch lasted from 12,000 to 9500 years BP giving rise to 34 explosive eruptions, each every 70 years on
average. During the II epoch, dated between 8600 and 8200 years BP, six explosive eruptions took place at an average
interval of 65 years. The III epoch lasted from 4800 to 3800 years BP and produced 16 explosive and four effusive eruptions
which followed each other at mean intervals of 50 years. Eruption vents of the I epoch were located mostly along the
marginal faults of the Neapolitan Yellow Tuff caldera, while those of the II epoch aligned on the northeastern sector of this
margin. During the III epoch volcanism was confined in the northeastern sector of the Neapolitan Yellow Tuff caldera floor.
The caldera floor is disjointed in blocks with variable vertical movements by fault and fracture systems mainly trending
NE–SW and NW–SE. The still active resurgence of the caldera floor began soon after its collapse. Onset of both II and III
epoch of activity coincides with increase in resurgence rate of La Starza marine terrace, the most uplifted part of the
resurgent block.
Description:
Published
Description:
221-246
Description:
1V. Storia e struttura dei sistemi vulcanici
Description:
JCR Journal
Description:
restricted
Keywords:
Campi Flegrei caldera
;
volcanism;
;
deformation
;
chronostratigraphy
;
04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
