Ductile and brittle deformation in the Cann Valley Granitoids, Victoria
作者:
G. Begg,
J. P. Burg,
C. J. L. Wilson,
期刊:
Australian Journal of Earth Sciences
(Taylor Available online 1987)
卷期:
Volume 34,
issue 1
页码: 95-110
ISSN:0812-0099
年代: 1987
DOI:10.1080/08120098708729395
出版商: Taylor & Francis Group
关键词: brittle deformation;ductile deformation;granites;mylonites;shear zones
数据来源: Taylor
摘要:
Foliated portions of the Early Devonian Bega Batholith were developed in an apparent flattening field contemporaneous with their plutonic emplacement. Overprinting the foliated portions of the granites are a series of Early‐Middle Devonian ductile shear zones characterized by mylonitic rocks with dextral horizontal movement. The principal shortening during the ductile shear zone development has a trend of 140°. Brittle deformation, confined to narrow gouge and microbreccia zones, is superimposed on the features of ductile deformation. The brittle features represent deformation at higher crustal levels with the orientation of the principal shortening becoming almost north‐south.
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