Three-dimensional visualization of the Neogene structures of an external sector of the northern Apennines,Italy

摘要

A three-dimensional (3-D) visualization technique is used to build a structural model linking a complex series of thrust sheets in an external area of the northern Apennines, central Italy. This foreland fold and thrust belt consists of faulted anticlines and broad syn- clines, involving a Triassic-Paleogene succession that is detached from the underlying basement. Reactivation of basement faults has influenced the geometry and kinematics of the overlying structures in a mix of thin-skinned and thick-skinned tectonics. Upper de- tachment horizons within the sedimentary succession form shallow structures in the crestal zone of the major anticlines. All the struc- tures are scantily cylindrical, and the model demonstrates the soft linkages between oblique and frontal structures through relay ramps.