Publikationsdatum:
2017-04-04
Beschreibung:
While the upper structure of the Southern Apennines is known, lack of control on the deep structure allows competing thin-skin and tick-skin models of the orogen. In thin-skin models the detachment decouples a stack of rootless nappes from the basement. In the tick-skin models, besement is involved in the most recent phase of thrusting. To examine crustal structure, we use teleseismic data from the CAT/SCAN array in southern Italy. We use receiver functions (RF) processed into a Common Conversion Point (CCP) stack to generate images of the crust. Interpretation and correlation to geological structure is done using inversions of individual station RFs. We focus on a shallow discontinuity where P-to-S conversions occur. In the foreland, it corresponds to velocity jumps between carbonate and clastic strata with basement. A similar interpretation for the Apennines provides the most parsimonious explanation and supports a tick-skin interpretation. In a thick-skin reconstruction, the amount of shortening is much smaller than for a thin-skin model. This implies considerably less Plio-Pleistocene shortening across the Apennines and suggests an E-SE motion of the Calabrian Arc subparallel to the southern Apennines rather than a radial expansion of the Arc.
Beschreibung:
In press
Beschreibung:
3.3. Geodinamica e struttura dell'interno della Terra
Beschreibung:
JCR Journal
Beschreibung:
open
Schlagwort(e):
receiver functions
;
Apennines
;
thrust tectonics
;
structural geology
;
01. Atmosphere::01.03. Magnetosphere::01.03.04. Structure and dynamics
Repository-Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Materialart:
manuscript
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