The hercynian chain in Sardinia (Italy)

Over the last 25 years the Italian national geological mapping program of the Italian Geological Survey (CARG Project, italian: Progetto Carta Geologica) at 1:50,000 scale has led to significant improvements in the geological knowledge for the Island of Sardinia (Italy). As a result, about one half of the island now is covered by new geological maps with 1:10,000–1:25,000 accuracy and geological maps at the 1:50,000 scale whose explanatory notes are available electronically. At the beginning of the CARG Project a geological map for Sardinia Island at 1:200,000 scale was published [Carmignani, L. (1996). Carta Geologica della Sardegna (1:200.000). Servizio Geologico Nazionale, Regione Autonoma della Sardegna], summarizing all the geological information available at that time, and a book with explanatory notes for the map was later published [Carmignani, L., Oggiano, G., Barca, S., Conti, P., Salvadori, I., Eltrudis, … Pasci, S. (2001). Geologia della Sardegna: Note Illustrative della Carta Geologic...

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The geological map of Sardinia (Italy) at 1:250,000 scale

The Ghomarides nappes are the uppermost basement nappes in the Rifan Alpine belt. Paleozoic rocks constitute the prominent part of these nappes, together with Triassic and younger cover sediments. Four nappes are distinguished, each one with a distinct stratigraphical sequence, especially for the Devonian and Carboniferous periods. Sedimentological and structural arguments plead for an initial location on the northern margin of the African continent. The main folding and metamorphic events are shown to be Eo-Variscan (late Acadian). Tectonic vergence was to the north (present coordinates). Late Variscan (Hercynian) shortening gave upright, NW-SE trending folds. Alpine ductile overprints are scarce except at the base of the lowest nappe where K/Ar phengite ages are about 25 Ma. The Ghomarides nappes correlate with the Malaguides nappes (Betic Cordilleras, southern Spain), the Kabylian (northern Algeria) and Calabrian (southern Italy) Paleozoic nappes, the Tuscan-South-Alpine basement and the Upper Austro-Alpine nappes. The proposed correlations allow us to restaure the southern margin of the Hercynian belt along northwestern Africa.

The Ghomarides Nappes, Rif Coastal Range, Morocco: A Variscan chip in the Alpine Belt

Antimony in the soil-water-plant system at the Su Suergiu abandoned mine (Sardinia, Italy): strategies to mitigate contamination.

A Hercynian suture zone in Sardinia: geological and geochemical evidence

'Guide - book to the excursion on the paleozoic basement of Sardinia.'

Outlines of the Hercynian basement of Sardinia

'Further geochemical data on the pre - hercynian igneous activities of Sardinia and on theier geodinamic significance'

Structural and Paleogeographic Lineaments of the variscan cycle in Sardinia

The geology of Iglesiente

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