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Interpreting siliciclastic-carbonate detrital modes in foreland basin systems: An example from Upper Miocene arenites of the central Apennines, Italy

By
Salvatore Critelli
Salvatore Critelli
1
Dipartimento di Scienze della Terra, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy
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Emilia Le Pera
Emilia Le Pera
1
Dipartimento di Scienze della Terra, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy
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Fabrizio Galluzzo
Fabrizio Galluzzo
2
Agenzia per la Protezione dell'Ambiente e per i Servizi Tecnici (APAT), Via Vitaliano Brancati 48, 00144 Roma, Italy
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Salvatore Milli
Salvatore Milli
3
Dipartimento di Scienze della Terra, Università di Roma “La Sapienza,” Piazzale Aldo Moro, 5, 00185 Roma, Italy and Istituto di Geologia Ambientale e Geoingegneria, Consiglio Nazionale delle Ricerche (CNR), Via Bolognola, 7, 00138 Roma, Italy
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Massimiliano Moscatelli
Massimiliano Moscatelli
4
Istituto di Geologia Ambientale e Geoingegneria, Consiglio Nazionale delle Ricerche (CNR), Via Bolognola, 7, 00138 Roma, Italy
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Sonia Perrotta
Sonia Perrotta
5
Istituto di Geologia, Università di Urbino, località Crocicchia, 61029 Urbino, Italy, and Dipartimento di Scienze della Terra, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy
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Massimo Santantonio
Massimo Santantonio
6
Dipartimento di Scienze della Terra, Università di Roma “La Sapienza,” Piazzale Aldo Moro, 5, 00185 Roma, Italy
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Published:
January 01, 2007

In the central Apennines, interacting siliciclastic and carbonate marine clastic wedges filled the foreland basin system during the late Miocene. Conjunction of collisional thrust tectonics and prethrusting normal faults generated a complex foredeep with intrabasinal structural highs that represented additional source areas to the basin.

Detrital modes of the late Miocene central Apennines orogenic system range in composition from intrabasinal carbonate to quartzofeldspatholithic and calclithite arenites. The external zone of the foredeep is characterized by hemipelagic deposits, called the Orbulina Marl. Their arenite beds are composed by intrabasinal carbonate, with dominant bioclasts and minor intraclasts, and glauconite derived from an active shallow-marine carbonate source. These hemipelagic deposits are partly coeval with and partly overlain by siliciclastic turbidites of the Frosinone and the Argilloso-Arenacea Formations, and they represent deposition within local foredeep depocenters. Siliciclastic turbidite sandstones are quartzofeldspatholithic, which documents provenances from metamorphic, plutonic, ophiolitic, and sedimentary rocks. Carbonate intrabasinal structural highs were the main source for carbonate breccias, intrabasinal arenites, and calclithites of the Brecce della Renga Formation, the deposits of which are locally interbedded with the coeval siliciclastic turbidite sandstones.

Evolution of late Miocene sandstone detrital modes reflected the changing nature of the central Apennines thrust belt through time and the complex architecture of the foreland basin system; it records the history of accretion, deformation of the foredeep, and progressive areal reduction of carbonate-producing areas along with the sedimentary and structural evolution of local intrabasinal highs.

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GSA Special Papers

Sedimentary Provenance and Petrogenesis: Perspectives from Petrography and Geochemistry

José Arribas
José Arribas
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Mark J. Johnsson
Mark J. Johnsson
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Salvatore Critelli
Salvatore Critelli
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Geological Society of America
Volume
420
ISBN print:
9780813724201
Publication date:
January 01, 2007

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