A Palaeozoic age is proposed for the top of the metamorphic sequences ("Complex II' Auct.) outcropping in the eastern part of the island of Elba (Tuscany, Italy), on the basis of microstructural, petrographic, geochemical data and comparisons with known Paleozoic sequences of Sardinia and Tuscany. The equivalence between the upper part of the Complex II and the Mesozoic-Tertiary part of the "Apuan Autochthon' ("Tuscanid I' Auct.), widely accepted in literature so far, seems no longer reliable. Phyllites, overlying marbles and calcschists, show relics of an earlier, probably pre-Alpine, schistosity and rotated albite to oligoclase eyes with helicitic textures. The chemical data corroborate the petrographical differences. -from Authors
Paleozoic age for the Tuscan upper metamorphic sequences of Elba and its implications for the geology of the Northern Apennines (Italy) / E.Pandeli; M.Puxeddu. - In: ECLOGAE GEOLOGICAE HELVETIAE. - ISSN 0012-9402. - STAMPA. - 83/1:(1990), pp. 123-142.
Paleozoic age for the Tuscan upper metamorphic sequences of Elba and its implications for the geology of the Northern Apennines (Italy)
PANDELI, ENRICO;
1990
Abstract
A Palaeozoic age is proposed for the top of the metamorphic sequences ("Complex II' Auct.) outcropping in the eastern part of the island of Elba (Tuscany, Italy), on the basis of microstructural, petrographic, geochemical data and comparisons with known Paleozoic sequences of Sardinia and Tuscany. The equivalence between the upper part of the Complex II and the Mesozoic-Tertiary part of the "Apuan Autochthon' ("Tuscanid I' Auct.), widely accepted in literature so far, seems no longer reliable. Phyllites, overlying marbles and calcschists, show relics of an earlier, probably pre-Alpine, schistosity and rotated albite to oligoclase eyes with helicitic textures. The chemical data corroborate the petrographical differences. -from Authors
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