The trending of Triassic evaporites cropping out at Sassalbo (Tuscany) and in Secchia Valley (Emilia Romagna) represents one of the most important trans-Apennines lineaments to gain informations about the structural evolution of the apenninic chain from the collisional to the more recent extensional tectonic phases. Two groups of outcrops have been distinguished: 1) Sassalbo - Cerreto Pass group; 2) Secchia Valley group. Taking into account abundant published data and new field observations some considerations on their tectonic evolution and emplacement are proposed. These deposits, with their associated sedimentary sequence, belong to the internal Tuscan realm. In spite to the common origin and provenance, at a certain time of the geological history (Tertiary) from diapiric structure evolved into flattened salt tongue and finally they have been dismembered and a more external portion has been translated towards the external adriatic-padan zone, originating the salt outcrops of Secchia Valley, the most external Tuscan allochthonous triassic evaporites nucleus of the Northern Apennine mountain building.
The triassic evaporites of Sassalbo and secchia valley (Tuscan-Emilian Apennines): geometric and kinematic data
MONTOMOLI, CHIARA;
2013-01-01
Abstract
The trending of Triassic evaporites cropping out at Sassalbo (Tuscany) and in Secchia Valley (Emilia Romagna) represents one of the most important trans-Apennines lineaments to gain informations about the structural evolution of the apenninic chain from the collisional to the more recent extensional tectonic phases. Two groups of outcrops have been distinguished: 1) Sassalbo - Cerreto Pass group; 2) Secchia Valley group. Taking into account abundant published data and new field observations some considerations on their tectonic evolution and emplacement are proposed. These deposits, with their associated sedimentary sequence, belong to the internal Tuscan realm. In spite to the common origin and provenance, at a certain time of the geological history (Tertiary) from diapiric structure evolved into flattened salt tongue and finally they have been dismembered and a more external portion has been translated towards the external adriatic-padan zone, originating the salt outcrops of Secchia Valley, the most external Tuscan allochthonous triassic evaporites nucleus of the Northern Apennine mountain building.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
