HR: 12:05h
AN: OS51D-08    [PDF]
TI: Modeling the Stratigraphy and Tectonics Around the Gargano Peninsula on the Adriatic Coast of Italy
AU: * Steckler, M S
EM: steckler@ldeo.columbia.edu
AF: Lamont-Doherty Earth Observatory, 61 Route 9W, Palisades, NY 10964 United States
AU: Ridente, D
AF: Istituto di Geologia Marina - ISMAR (CNR), via Gobetti, 101, Bologna, 40128 Italy
AU: Trincardi, F
EM: fabio.trincardi@bo.ismar.cnr.it
AF: Istituto di Geologia Marina - ISMAR (CNR), via Gobetti, 101, Bologna, 40128 Italy
AB: The E-W trending Gargano Peninsula interrupts the Adriatic foreland of the Apennines. This uplifted block and additional faults and structural highs represent a tear structure that separates the Adriatic foredeep to the north from the Apulia foredeep to the south. In the region surrounding the Gargano Peninsula a succession of four depositional sequences mainly composed of regressive deposits have been mapped. The four stratigraphic packages and their associated prominent erosion surfaces correspond to the last four 100ky sea level cycles. The sediments that comprise these sequences have primarily been transported along the Adriatic margin from the Po and other Apennine Rivers by the strong the along-strike current system. The geometry of these four sequences exhibits significant changes in thickness and morphology along strike of the Adriatic margin due to the local tectonics. We have used Sequence4, an interactive stratigraphic modeling program to duplicate the changes in geometry of the deposits along a series of 2D sections. The code was modified to allow for out-of-plane sediment supply rather than just landward supply. The variation in the sequences was obtained by varying the tectonics uplift associated with the Gargano Peninsula structures and sediment supply due to the interaction of the sediments and the tectonics along the dispersal pathway. The results and their implications for the understanding both the local tectonics and sequence architecture will be presented.
DE: 3022 Marine sediments--processes and transport
DE: 4219 Continental shelf processes
DE: 8105 Continental margins and sedimentary basins
DE: 9335 Europe
SC: Ocean Sciences [OS]
MN: 2003 Fall Meeting