Quartz microfabric of the Laxfordian Canisp shear zone, NW Scotland

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doi: 10.1016/0191-8141(84)90053-1
Authors:Jensen, Lars N.
Author Affiliations:Primary:
Aarhus Univ., Dep. Geol., Aarhus, Denmark
Volume Title:Journal of Structural Geology
Source:Journal of Structural Geology, 6(3), p.293-302. Publisher: Pergamon, Oxford-New York, International. ISSN: 0191-8141
Publication Date:1984
Note:In English. 23 refs.; illus. incl. 1 table, 2 plates, geol. sketch maps
Summary:This is a vertical ductile shear zone with a dextral shear sense. Minerals in the layered gneisses show little or no shape fabric whilst in the shear zone a strong shape fabric defines the foliation. For quartz, this shape fabric is accompanied by development of a preferred crystal orientation with fabric patterns reflecting the geometry of the shear deformation. The quartz fabric shows a pole-free area around the lineation with the c-axis concentrated in an asymmetric cross-girdle or a point maximum perpendicular to the shear plane, and a monoclinic symmetry consistent with the shear sense. [M.E.J.]
Subjects:Amphibolite facies; Antiform folds; Deformation; Ductility; Facies; Field studies; Folds; Framework silicates; Gneisses; Interpretation; Laxfordian; Lewisian; Mesoproterozoic; Metamorphic rocks; Precambrian; Preferred orientation; Proterozoic; Quartz; Shear; Shear zones; Silica minerals; Silicates; Structural analysis; Structural geology; Style; Tonalite gneiss; Upper Precambrian; Europe; Great Britain; Scotland; United Kingdom; Western Europe; Canisp shear zone; Inverian Lochinver antiform; Linear deformation; Lochinver; Northwestern Scotland
Coordinates:N544000 N610000 W0004500 W0083000
Abstract Numbers:85M/3272
Record ID:1985013888
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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