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Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/EB13BC5C-EC6C-4574-B043-B0AA2F11FEC9 | ||
| Year | 2002 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
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| Bibliographic Citation | 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 | ||
| Appears in Collections |
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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