Evidence of an upper ordovician thermo-metamorphic event in the SW-Corner of the Cantabrian Mountains (N-Spain)
DOI:
https://doi.org/10.3989/egeol.92485-6395Keywords:
Spain, Cantabrian Mountains, Somiedo-Correcilla Unit, Narcea Anticline, Upper Ordovician, Illite crystallinity, very low-grade metamorphism, thermo-metamorphismAbstract
According to Illite «crystallinity» (IC) data, the metamorphic evolution of the SW Cantabrian Mountains took place in several steps. After a Precambrian deformation with accompanying low-grade metamorphism a thermal event during the Upper Ordovician affected the Cambro-Ordovician sediments. This event is marked by anchizonal IC values in the Pre-Silurian sequence contrasting the diagenetic data obtained from Siluro-Devonian rocks.
Apparently, the metamorphic history in that part of the Cantabrian Mountains ended during the Late Ordovician, a Hercynian metamorphism cannot be proven conclusively.
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Published
1992-12-30
How to Cite
Keller, M., & Krumm, S. (1992). Evidence of an upper ordovician thermo-metamorphic event in the SW-Corner of the Cantabrian Mountains (N-Spain). Estudios Geológicos, 48(5-6), 289–296. https://doi.org/10.3989/egeol.92485-6395
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