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Evidence of progressive deformation in minor structures in Western Asturias (N. W. Spain)

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Zusammenfassung

Beispiele für progressive Deformation in Kleinstrukturen sind in der geologischen Literatur nicht häufig. In Nordwestspanien können einige Kleinstrukturen in altpaläozoischem, inhomogenem, geschichtetem Material als Ergebnis progressiver Deformation während der herzynischen Orogenese gedeutet werden.

Die Beispiele umfassen Strukturen, die durch progressive Kontraktion (gefaltete Keile), Kontraktion mit nachfolgender Verlängerung (durch Boudinage unterbrochene Falten) und Verlängerung mit nachfolgender Kontraktion (gefaltete Streckungsspindeln) entstanden.

Abstract

Examples of progressive deformation provided by minor structures are not frequent in the geological literature. In NW Spain some minor structures in Lower Paleozoic inhomogeneous layered material may be interpreted as the result of progressive deformation during the Hercynian Orogeny.

The examples described include structures generated by progressive contraction (folded wedges), contraction followed by elongation (folds disrupted by boudinage) and elongation followed by contraction (folded boudins).

Resumen

Los ejemplos de estructuras menores que muestran evidencia de haber sido originados por deformación progresiva no son muy frecuentes en la literatura geológica. En el NW de España, determinadas estructuras menores originadas durante la Orogénesis Herciniana en rocas inhomogeneas estratificadas del Paleozoico inferior, pueden ser interpretadas como el resultado de una deformación progresiva. Los ejemplos que se citan incluyen estructuras originadas por contraction progresiva (cuñas plegadas), contracción seguida por elongación (pliegues fuertemente estirados o partidos por boudinage) y elongación seguida por contracción (boudins plegados).

кРАткОЕ сОДЕРжАНИЕ

ОпИсАНы МЕлкИЕ стРУк тУРНыЕ тЕктОНИЧЕскИ Е ЁлЕМЕНты ДРЕВНЕпАлЕОжОИскОг О ВОжРАстА У пОРОД НЕгО МОгЕННых И слОИстых, ОБРАжОВАВшИЕсь В РЕж УльтАтЕ пРОгРЕссИВНОИ ДЕФОР МАцИИИ ВО ВРЕМь гЕРцИ НскОгО ОРОгЕНЕжА В сЕВЕРНОИ ИспАНИИ. ОпИсАНы стРУктУРНыЕ ЁлЕМЕНты, ВОжНИкАУЩИ Е пРИ ВОжРАстАНИИ сжАтИь (склАДЧАтыЕ клИНьь), сж АтИИ с пОслЕДУУЩИМ РА стьжЕНИЕМ (В РЕжУльтАтЕ БУДИНАжА пРЕРВАНых с клАДОк) И РАстьжЕНИИ с пОслЕДУУЩИМ сжАтИЕМ (склАДОЧНыЕ «ВЕРЕтЕНА» РАстьжЕН Иь).

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Author notes

  1. Alberto Marcos &  Maria L. Arboleya

    Present address: Depto. de Geotectónica, Facultad de Ciencias, Universidad, Oviedo, Spain

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    1. Alberto Marcos
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    2. Maria L. Arboleya
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    Marcos, A., Arboleya, M.L. Evidence of progressive deformation in minor structures in Western Asturias (N. W. Spain). Geol Rundsch 64, 278–287 (1975). https://doi.org/10.1007/BF01820668

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