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Abstract

(Begin page 419)

AAPG Bulletin, V. 85, No. 3 (March 2001), P. 419-431.

Copyright ©2001. The American Association of Petroleum Geologists. All rights reserved.

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

Mauro De Donatis1

1Università di Urbino, Facoltà di Scienze Ambientali, Campus scientifico, 61029 Urbino, Italy; email: [email protected]

AUTHORS

Mauro De Donatis is a lecturer at the University of Urbino where he received a degree in geological sciences in 1987. He also received a postgraduate qualification in geological cartography in Bologna (1988) and an M.Sc. degree in basin evolution and dynamics from Royal Holloway (University of London, 1996). He has been a consultant for regional and national geological cartography projects. His current research is mainly focused on thrust and strike-slip tectonics and sedimentation in foreland basin settings, integrating fieldwork and interpretation of satellite images and seismic profiles with computer-assisted analysis and modeling.

ACKNOWLEDGMENTS

I am grateful to Ken McClay and Chris Elders for their suggestions and discussions during the modeling work at the Department of Geology of the Royal Holloway-University of London. Special thanks to Alan Gibbs, Rosalind Russell, and Stephanie Kape from Midland Valley Ltd. for the software license and help. I convey my gratitude to Stefano Mazzoli and the two reviewers (J. H. Shaw and S. C. Williams-Stroud): they helped me to improve this article. Part of the fieldwork was carried out for the Geological Cartographic Project of Emilia-Romagna Region. British Gas Ri. Mi. (Milan) supplied seismic sections and well logs.

ABSTRACT

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.

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