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Hercynian deformation andmetamorphism in the Cordillera Orientalof southern Bolivia, central Andes

Manoutsoglou Emmanouil, Hans Ahrendt, Volker Jacobshagen, Joachim Muller, Klaus Wemmer

Πλήρης Εγγραφή

URI: http://purl.tuc.gr/dl/dias/EB13BC5C-EC6C-4574-B043-B0AA2F11FEC9
Έτος 2002
Τύπος Δημοσίευση σε Περιοδικό με Κριτές
Άδεια Χρήσης
Λεπτομέρειες
Βιβλιογραφική Αναφορά V. Jacobshagen, J. Müller , K. Wemmer ,H. Ahrendt , E. Manutsoglu ," Hercynian deformation and metamorphism in the Cordillera Oriental of southern Bolivia, central Andes,"Tecton.,vol. 345,no.1-4,pp.119-130,Feb. 2002.doi:10.1016/S0040-1951(01)00209-8 https://doi.org/10.1016/S0040-1951(01)00209-8
Εμφανίζεται στις Συλλογές
Δημοσιεύσεις σε Περιοδικά στην Κοινότητα Σχολή Μηχανικών Ορυκτών Πόρων

Περίληψη

In southern Bolivia the very thick Ordovician siliciclastic rocks of the Cordillera Oriental show folds and a slaty cleavage ofpre-Cretaceous age. These deformations had previously been attributed to either the late Ordovician Oclo´yic or to the lateDevonian to early Carboniferous Eohercynian (Chanic) orogenies. Now, we present K/Ar age determinations from phyllosilicatesof the Ordovician slates, which have been interpreted in relation to illite crystallinity data. High anchizonal to epizonalmetamorphism is indicated for most of the investigated samples. The majority of the samples have provided ages within the 320–290 Ma interval (late Carboniferous to early Permian), indicating a late Hercynian orogeny. Traces of synchronous orogenicprocesses are known from different parts of the Central Andes. This points to late Hercynian orogenic activities in that region.

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