Correlation of strain with anisotropy of magnetic susceptibility (AMS)
Tóm tắt
Existing correlations between strain and anisotropy of low-field magnetic susceptibility (AMS) have been re-assessed using a single parameter to express both anisotropies. TheP′ parameter (Hrouda, 1982) shows potential as a powerful single expression of the intensity of strain and of AMS. Previous correlations are improved by use of this parameter. Cautious optimism is justified for correlations between strain and susceptibility in a certain strain window between a lower limit (excluding the incomplete overprint of predeformation anisotropy) and an upper limit (excluding the effects of saturation anisotropy). For successful correlations the influence of stress-controlled recrystallisation should be minimal and the mineralogical sources of susceptibility must predate deformation.
Tài liệu tham khảo
Borradaile, G. J. (1987a),Anisotropy of Magnetic Susceptibility: Rock Composition versus Strain, Tectonophysics138, 327–329.
Borradaile, G. J. (1987b),Analysis of Strained Sedimentary Fabrics: Review and Tests. Can J. Earth Sci.24, 442–455.
Borradaile, G. J. (1988),Magnetic Susceptibility, Petrofabrics and Strain, Tectonophysics156, 1–20.
Borradaile, G. J., Mackenzie, A., andJensen, E. (1990), Silicate versus Trace Mineral Susceptibili in Metamorphic Rocks, J. Geophys. Res.95, 8447–8451.
Borradaile, G. J. andMothersill J. S. (1984),Coaxial Deformed and Magnetic Fabrics Without Simply Correlated Magnitudes of Principal Values, Phys. Earth and Planet. Int.35, 294–300.
Borradaile, G. J., Mothersill, J. S., Tarling, D. M., andAlford, C. (1986)Sources of Magnetic Susceptibility in a Slate, Earth and Planet. Sci. Letters,76, 336–340.
Borradaile, G. J. andAlford, C. (1987),Relationship between Magnetic Susceptibility and Strain in Laboratory Experiments, Tectonophysics133, 121–135.
Borradaile, G. J. andAlford, C. (1988),Experimental Shear Zones and Magnetic Fabrics, J. Struct. Geol.10, 895–904.
Clendenen, W. S., Kligfield, R., Hirt, A. M., andLowrie, W. (1988),Strain Studies of Cleavage Development in the Chelmsford Formation, Sudbury Basin, Ontario, Tectonophysics145, 191–211.
Cogné, J. P., andPerroud, H. (1988),Anisotropy of Magnetic Susceptibility as a Strain Gauge in the Flamanville Granite, NW France, Phys. Earth and Planet. Int.51, 264–270.
Henry, B. (1990),Magnetic Fabric Implications for the Relationships between Deformation Mode and Grain Growth in Slates from the Borrowdale Volcanic Group in the English Lake District, Tectonophysics178, 225–230.
Hirt, A. M., Lowrie, W., Clendenen, W. S., andKligfield, R. (1988),The Correlation of Magnetic Anisotropy with Strain in the Chelmsford Formation of the Sudbury Basin, Ontario, Tectonophysics145, 177–179.
Hrouda, F. (1987),Mathematical Model Relationship between the Paramagnetic Anisotropy and Strain in Slates, Tectonophysics142, 323–327.
Hrouda, F. (1982),Magnetic Anisotropy and its Application in Geology and Geophysics, Geophysical Surveys5, 37–82.
Hrouda, F., Stephenson, A., andWoltar, L. (1983),On the Standardization of Measurements of the Anisotropy of Magnetic Susceptibility, Phys. Earth and Planet. Int.32, 203–208.
Jelinek, V. (1981),Characterization of the Magnetic Fabrics of Rocks, Tectonophysics79, T63–T67.
Kligfield, R., Lowrie, W., andDalziel, I. W. D. (1977),Magnetic Susceptibility Anisotropy as a Strain Indicator in the Sudbury Basin, Ontario, Tectonophysics40, 287–308.
Kligfield, R., Owens, W. H., andLowrie, W. (1981),Magnetic Susceptibility Anisotropy, Strain and Progressive Deformation in Permian Sediments from the Maritime Alps (France) Earth and Planet. Sci. Letters55, 181–189.
Kligfield, R., Lowrie, W., andPfiffner, O. A. (1982),Magnetic Properties of Deformed Oolitic Limestones from the Swiss Alps: The Correlation of Magnetic Anisotropy and Strain, Eclogae geol. Helv.75/1, 127–157.
Kneen, Sylvia J. (1976),The Relationship between the Magnetic and Strain Fabrics of Some Haematitebearing Welsh Slates, Earth and Planet. Sci. Letters31, 413–416.
Oertel, G. (1983),The Relationship of Strain and Preferred Orientation of Phyllosilicate Grains in Rocks — A Review, Tectonophysics100, 413–447.
Ramsay, J. G.,Folding and Fracturing of Rocks, (McGraw-Hill, New York 1987) 568 pp.
Rathore, J. S. (1979),Magnetic Susceptibility Anisotropy in the Cambrian Slate Belt of N. Wales and Correlation with Strain, Tectonophysics53, 83–98.
Rathore, J. S. (1980),The Magnetic Fabrics of Some Slates from the Brrowdale Volcanic Group in the English Lake District and their Correlations with Strains, Tectonophysics67, 207–220.
Rathore, J. S., andHenry, B. (1982),Comparison of Strained Magnetic Fabrics in Dalradian Rocks from the Southwest Highlands of Scotland, J. Struct. Geol.4, 373–384.
Rathore, J. S., Courrioux, G., andChoukroure, P. (1983),Study of Ductile Shear Zones (Galicia, Spain) using Texture Goniometry and Magnetic Fabric Methods, Tectonophysics98, 87–109.
Rathore, J. S., andHugon, H.,Comparison of magnetic, mica and reduction spot fabrics in the Rocroi Massif, Ardenes, France, InThe Rhenish Massif (Vogel, A., Miller, H., and Greiling, R. eds) (F. Vieweg and Sohn., Brauschweig/Wiesbaden 1987) pp. 79–94.
Rathore, J. S. (1988),Strain to Anisotropy Correlations Corrected for the Digico Calbration Error, Phys. Earth. and Planet. Int.51, 355–360.
Rochette, P. (1988),Mathematical Model Relationship between the Paramagnetic Anisotropy and Strain in Slates — Discussion, Tectonophysics156, 313–315.
Wood, D. S., Oertel, G., Singh, J., andBennett, H. F. (1976),Strain and Anisotropy in Rocks, Phil. Trans. R. Soc. Lond.A283, 27–42.