TY - JOUR
T1 - 'Fracture cleavage' in the Duluth Complex, northeastern Minnesota ( USA).
AU - Foster, M. E.
AU - Hudleston, P. J.
PY - 1986
Y1 - 1986
N2 - An unusual cleavage is developed in troctolitic rocks of the late Precambrian Duluth Complex in NE Minnesota. It is localised in a zone approx 250 m wide, and it is parallel to the axes of gentle folds in rhythmic banding. The rocks show no textural signs of ductile deformation, and the cleavage is defined by fractures that are fairly straight and evenly spaced, but on a fine scale, somewhat irregular, multiple, anastomosing, and locally crosscutting. Localization of the cleavage seems to be due to the presence of a structure, probably a dike, below the layered intrusive rocks. This could have served to localize stresses and reactive fluids at high pressure during a late stage of continental rifting.-from Authors
AB - An unusual cleavage is developed in troctolitic rocks of the late Precambrian Duluth Complex in NE Minnesota. It is localised in a zone approx 250 m wide, and it is parallel to the axes of gentle folds in rhythmic banding. The rocks show no textural signs of ductile deformation, and the cleavage is defined by fractures that are fairly straight and evenly spaced, but on a fine scale, somewhat irregular, multiple, anastomosing, and locally crosscutting. Localization of the cleavage seems to be due to the presence of a structure, probably a dike, below the layered intrusive rocks. This could have served to localize stresses and reactive fluids at high pressure during a late stage of continental rifting.-from Authors
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U2 - 10.1130/0016-7606(1986)97<85:FCITDC>2.0.CO;2
DO - 10.1130/0016-7606(1986)97<85:FCITDC>2.0.CO;2
M3 - Article
AN - SCOPUS:84879886893
VL - 97
SP - 85
EP - 96
JO - Bulletin of the Geological Society of America
JF - Bulletin of the Geological Society of America
SN - 0016-7606
IS - 1
ER -