Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1113
AuthorsD'Agostino, N.* 
Jackson, J.* 
Dramis, F.* 
Funiciello, R.* 
TitleInteractions between mantle upwelling, drainage evolution and active normal faulting: an example from the central Apennines (Italy)
Issue Date16-Jun-2001
Series/Report no.147(2001)
URIhttp://hdl.handle.net/2122/1113
Keywordscrustal deformation
mantle upwelling
Quaternary
normal faulting
Subject Classification04. Solid Earth::04.07. Tectonophysics::04.07.99. General or miscellaneous 
AbstractIn this paper we show that the processes that have shaped the Quaternary surface development of the Apennines in central Italy are all consequences of a single subcrustal process, the upwelling of the mantle. The relationship between gravity and topography shows that mantle convection is responsible for a long-wavelength (150–200 km) topographic bulge over the central Apennines, and stratigraphic evidence suggests this bulge developed in the Quaternary. Active normal faulting is localized at the crest of this bulge and produces internally-draining fault-bounded basins. These basins have been progressively captured by the aggressive headward erosion of major streams that cut down to the sea on the flanks of the regional bulge. The only surviving closed basins are those on the Apennine watershed most distant from the marine base level, where continued normal faulting is still able to provide local subsidence that defeats their capture by the regional drainage network. Understanding the competition between regional capture and local, fault-related subsidence of intermontane basins is crucial for recognizing potentially hazardous active faults in the landscape and also for interpreting the sediment supply to adjacent offshore regions. Central Italy provides a good modern analogue for processes that are probably common in the geological record, particularly on rifted margins and intracontinental rifts, but may not have been fully appreciated.
Appears in Collections:Manuscripts
Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
dagostino_GJI_2001.pdf2.01 MBAdobe PDFView/Open    Request a copy
Show full item record

Page view(s)

67
checked on May 27, 2017

Download(s)

18
checked on May 27, 2017

Google ScholarTM

Check