GeoSed - Associazione Italiana per la Geologia del Sedimentario
Dipartimento di Scienze della Terra dell'Università di Siena
Via Laterina, 8
53100 Siena
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Table of Contents


Vol. 9 - 2010

Vol. 8 - 2009

Vol. 7 - 2008
SP 1 - 2008

Vol. 6 - 2007
Vol. 5 - 2006
Vol. 4 - 2005
Vol. 3 - 2004
Vol. 2 - 2003
Vol. 1 - 2001-2002

Notes for Authors
(PDF - 80 kb)



GeoActa Special Publication 1 2008


Acquisto online

GeoActa
an international Journal of Earth Sciences


Marco Malusà
Istituto di Geoscienze e Georisorse, Consiglio Nazionale delle Ricerche, Via Accademia delle Scienze, 5 - 10123 torino, Italy. E-mail: m.malusa@libero.it
Massimiliano Zattin
Dipartimento di Scienze della Terra e Geologico-Ambientali, Università di Bologna, Via Zamboni 67, 40127 Bologna, Italy. E-mail: zattin@geomin.unibo.it
Sergio Andò, Eduardo Garzanti, Giovanni Vezzoli
Laboratorio di Petrografia del Sedimentario, Dipartimento di Scienze Geologiche e Geotecnologie, Università di Milano-Bicocca, Piazza della Scienza, 4 – 20126 Milano, Italy. E-mail: sergio.ando@unimib.it, eduardo.garzanti@unimib.it, giovanni.vezzoli@unimib.it

Detrital apatite fission-track ages from the Po sands: Implications for the erosional pattern of the orogenic source areas


Volume 4, 2005, pages 57-66

PDF (539 KB)
Abstract

Fission-track dating on detrital apatites from modern sands of the Po delta is employed for a provenance study of sediments in the Po River drainage. Analysed samples show a fission-track grain-age distribution characterized by a well-resolved peak at 10 Ma, beside two other peaks at 19 and 40 Ma. The youngest peak is significantly larger than the older peaks, and accounts for 63% of the total population of dated grains. This young component in the grain-age distribution is consistent with the bedrock cooling ages observed in the Western Alps between the External Massifs and the Houiller unit, as well as in the Lepontine dome of the Central Alps and in the Miocene foredeep units of the Apennines. These potential source areas represent only 10% of the total orogenic source area of the Po drainage. The above results suggest that most of the sediment delivered to the Po delta is supplied by small portions of the drainage that represent in many cases (Lepontine dome and External Massifs) fast-exhuming portions of the belt bounded by major faults.

Keywords: Apatite, Fission-track dating, Provenance, Modern sands, Po River.