During the Middle Triassic, the area between Gares Valley, Cimon della Stia and Focobon Valley (Belluno Province (ITA), Dolomities) was characterised by the slope of the carbontic platform of Pale di San Martino (Sciliar Dolomite) and the adjacent basin (Livinallongo/Buchenstein Formation). Subsequently the sedimentary succession were covered by ladinian volcanites and their contact with the underlying platforms is comlicated by a sindepositional ladinian tectonic. A geological map at 1:10000 scale and an analouge model (sandbox) have been performed in this thesis and they highlight two tectonic phases: the first extensional phase led to the formation of an asymmetric graben which has been filled by ladinian volcanics; the second compressive phase resumed the extensional structures, verticalizing them and forming thrusts.
Nel triassico medio l’area compresa tra la Valle di Gares, il Cimon della Stia e la Val Focobon (Provincia di Belluno (ITA), Dolomiti) era rappresentata a dallo slope della piattaforma carbonatica delle Pale di San Martino (Dolomia dello Sciliar) e dal bacino profondo attiguo (Formazione di Livinallongo/Buchenstein). Successivamente le successioni sedimentarie vennero coperte dalle vulcaniti ladiniche ed il loro contatto con le piattaforme sottostanti risulta complicato da una tettonica sindeposizionale ladinica. In questa tesi, sono stati realizzati una carta geologica alla scala 1:10000 ed un modello analogico (sandbox) dell’area che evidenziano due fasi tettoniche: la prima fase estensionale ha portato alla formazione di un graben asimmetrico che è stato riempito dalle vulcaniti; la seconda fase compressiva ha ripreso le strutture estensionali verticalizzandole e formando dei thrust.
Rilevamento geologico e modellazione analogica dell’area compresa tra la Valle di Gares, il Cimon della Sita e la Val Focobon (Provincia di Belluno, Dolomiti)
SOMMAVILLA, FRANCESCA
2023/2024
Abstract
During the Middle Triassic, the area between Gares Valley, Cimon della Stia and Focobon Valley (Belluno Province (ITA), Dolomities) was characterised by the slope of the carbontic platform of Pale di San Martino (Sciliar Dolomite) and the adjacent basin (Livinallongo/Buchenstein Formation). Subsequently the sedimentary succession were covered by ladinian volcanites and their contact with the underlying platforms is comlicated by a sindepositional ladinian tectonic. A geological map at 1:10000 scale and an analouge model (sandbox) have been performed in this thesis and they highlight two tectonic phases: the first extensional phase led to the formation of an asymmetric graben which has been filled by ladinian volcanics; the second compressive phase resumed the extensional structures, verticalizing them and forming thrusts.File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/68184