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The tectonono-metamorphic record of the Tuscan Nappe from the Colline Metallifere region (Northern Apennines, Italy)

Andrea Brogi and Giovanna Giorgetti
The tectonono-metamorphic record of the Tuscan Nappe from the Colline Metallifere region (Northern Apennines, Italy)
Italian Journal of Geosciences (June 2010) 129 (2): 177-187

Abstract

This paper deals with a structural and petrographic study carried out on key outcrops belonging to the Tuscan Nappe exposed in the Colline Metallifere region (Montieri-Poggio Prugnoli). Here, the Tuscan Nappe was affected by polyphase deformation characterised by superposed folding events (F (sub 1) , F (sub 2) and F (sub 3) ) and related tectonic foliations (S (sub 1) and S (sub 2) ) in agreement with the structural setting described for the Tuscan Nappe exposed both in other places of southern Tuscany, and in the Alpi Apuane region. The development of F (sub 1) folds was accompanied by metamorphism which produced a sin-kinematic mineralogical assemblage developed on the S (sub 1) tectonic foliation. This paragenesis, consisting of calcite+quartz+ or -muscovite+ or -Fe- and Ti-oxides, is indicative for a temperature of about 200-300 degrees C according to the T values estimated for the F (sub 1) folding event documented for the Tuscan Nappe of the Apuan Alps, suggesting a very low grade metamorphism which affected the Tuscan Nappe during its stacking in the Northern Apennines collisional belt.


ISSN: 2038-1719
EISSN: 2038-1727
Coden: BOGIAT
Serial Title: Italian Journal of Geosciences
Serial Volume: 129
Serial Issue: 2
Title: The tectonono-metamorphic record of the Tuscan Nappe from the Colline Metallifere region (Northern Apennines, Italy)
Affiliation: Universita di Siena, Dipartimento di Scienze della Terra, Siena, Italy
Pages: 177-187
Published: 201006
Text Language: English
Summary Language: Italian
Publisher: Societa Geologica Italiana, Rome, Italy
References: 59
Accession Number: 2011-004183
Categories: Structural geologyIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, geol. sketch map
N42°52'60" - N42°52'60", E11°37'00" - E11°37'00"
Country of Publication: Italy
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 201103
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