Heterogeneous deformation and mylonitization of a granulite complex, jotun‐valdres nappe complex, Central South Norway
作者:
Andreas G. Koestler,
期刊:
Geological Journal
(WILEY Available online 1988)
卷期:
Volume 23,
issue 1
页码: 1-13
ISSN:0072-1050
年代: 1988
DOI:10.1002/gj.3350230101
出版商: John Wiley&Sons Ltd
关键词: Jotun Nappe Complex;Norway;Caledonides;Heterogeneous deformation;Shear zones;Mylonites;Granulites;Pegmatites
数据来源: WILEY
摘要:
AbstractThe Helgedal Zone is the Caledonian, heterogeneously deformed base of the Jotun Complex, within the Jotun‐Valdres Nappe Complex (Sognefjell, South Norway). It consists of an anastomosing system of shear zones isolating lozengeshaped lenses of less deformed rocks. Structural and geometrical features are described to define the type of deformation and to evaluate the tectonic significance of this zone. Granulitic gabbros and pegmatitic dykes are deformed together in the highly strained mylonitic zones. Microtextural investigations indicate that the quantitative relation between mafic and felsic minerals and the content of quartz determine the different behaviour of the two rock types during deformatio
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