%0 Journal Article %1 steckler_etal:2008 %A Steckler, Michael S. %A Agostinetti, Nicola P. %A Wilson, Charles K. %A Roselli, Pamela %A Seeber, Leonardo %A Amato, Alessandro %A Lerner-Lam, Arthur %D 2008 %J Geology %K geophysics seismology %N 2 %P 155--158 %R 10.1130/G24065A.1 %T Crustal structure in the Southern Apennines from teleseismic receiver functions %U http://dx.doi.org/10.1130/G24065A.1 %V 36 %X While the upper crustal structure of the Southern Apennines is known, lack of control on the deep structure allows competing thin-skinned and thick-skinned models of the orogen. In thin-skinned models, the detachment decouples a stack of rootless nappes from the basement. In thick-skinned models, basement is involved in the most recent phase of thrusting. To examine crustal structure, we use teleseismic data from the Calabria-Apennine-Tyrrhenian/Subduction-Accretion-Collision Network (CAT/SCAN) array in southern Italy. We use receiver functions (RF) processed into a common conversion point stack to generate images of the crust. Interpretation and correlation to geological structure are 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 thick-skinned interpretation. In a thick-skinned reconstruction, the amount of shortening is much smaller than for a thin-skinned model. This implies considerably less Pliocene-Pleistocene shortening across the Apennines and suggests an east-southeast motion of the Calabrian arc subparallel to the southern Apennines rather than a radial expansion of the arc.

@article{steckler_etal:2008, abstract = {While the upper crustal structure of the Southern Apennines is known, lack of control on the deep structure allows competing thin-skinned and thick-skinned models of the orogen. In thin-skinned models, the detachment decouples a stack of rootless nappes from the basement. In thick-skinned models, basement is involved in the most recent phase of thrusting. To examine crustal structure, we use teleseismic data from the Calabria-Apennine-Tyrrhenian/Subduction-Accretion-Collision Network (CAT/SCAN) array in southern Italy. We use receiver functions (RF) processed into a common conversion point stack to generate images of the crust. Interpretation and correlation to geological structure are 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 thick-skinned interpretation. In a thick-skinned reconstruction, the amount of shortening is much smaller than for a thin-skinned model. This implies considerably less Pliocene-Pleistocene shortening across the Apennines and suggests an east-southeast motion of the Calabrian arc subparallel to the southern Apennines rather than a radial expansion of the arc.}, added-at = {2012-09-01T13:08:21.000+0200}, author = {Steckler, Michael S. and Agostinetti, Nicola P. and Wilson, Charles K. and Roselli, Pamela and Seeber, Leonardo and Amato, Alessandro and Lerner-Lam, Arthur}, biburl = {https://www.bibsonomy.org/bibtex/243fb4926afe492d781c50645215d0ede/nilsma}, day = 1, doi = {10.1130/G24065A.1}, interhash = {1b73163e66d10b8b7e695b275257ddff}, intrahash = {43fb4926afe492d781c50645215d0ede}, journal = {Geology}, keywords = {geophysics seismology}, month = feb, number = 2, pages = {155--158}, timestamp = {2021-02-09T13:23:47.000+0100}, title = {Crustal structure in the Southern Apennines from teleseismic receiver functions}, url = {http://dx.doi.org/10.1130/G24065A.1}, volume = 36, year = 2008 }