Geology of the Kumeta-Pizzuta ridges (NW Sicily)

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Abstract

We present a 1:25.000 scale geological map of the Kumeta-Pizzuta ridge in north western Sicily (Italy), which wasachieved by integrating stratigraphic, structural and geophysical data.In this area the tectonic edifice results from the piling-up of deep water-, carbonate platform- and pelagic platformderivedtectonic units (Imerese and Sicilide, Panormide and Trapanese domains respectively) originated by deformationsof former southern Tethyan continental margin.The structural setting shows interference of subsequent tectonic events, different type of structural styles, anddifferent-scale deformational patterns. Early overthrust of the Imerese on the Trapanese units (since late Serravallian)was followed by wedging at depth of the Trapanese units (after Tortonian). The wedging implied re-embrication andshortening into the overlying Imerese Units and produced main folding and compressive to transpressive structures alongthe Kumeta-Pizzuta Ridge.Seismic reflection profiles image the main E-W trending anticlines have been offset by high angle reverse totranspressive faults that merge at depth with low angle, regionally widespread, flat decollement surfaces that show, inthis sector, a northward tectonic transport. This setting supports backthrusting along transpressional faults in the studyarea, ruling-out that the Kumeta ridge is a positive flower structure related to a near-vertical deep, crustal, shear zone asformerly suggested
Original languageEnglish
Pages571-571
Number of pages1
Publication statusPublished - 2016

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