The relationship between the magnetic anisotropy and the c-axis fabric in a massive hematite ore
Article Sidebar
Published:
Dec 13, 1984
Keywords:
Hematite ore,
c-axis fabric,
Magnetic anisotropy
Volumes
Vols. 1-18 (1924-1944), ISSN 0044-2801
Main Article Content
Abstract
Preferred orientation of hematite ore from Minas Gerais, Brazil, was investigated by reflected-light microscopy, X-ray structural goniometry and magnetic anisotropy. A close relationship was found between c-axis fabrics determined by magnetic and non-magnetic methods; experiments confirmed the results of the theoretical treatment. For routine work it is advantageous to use both types of methods, profiting from rapidity of measurement of magnetic anisotropy and from detailed c-axis pole figures of pilot specimens provided by X-ray goniometry.
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Article Details
How to Cite
Hrouda, F., Siemes, H., Herres, N., & Hennig-Michaeli, C. (1984). The relationship between the magnetic anisotropy and the c-axis fabric in a massive hematite ore. Journal of Geophysics, 56(1), 174-182. Retrieved from https://journal.geophysicsjournal.com/JofG/article/view/244
Section
References
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Owens, W.H. (1974) Mathematical model studies on factors affecting the magnetic anisotropy of deformed rocks. Tectonophysics 24:115-131
Owens, W.H., Rutter, E.H. (1978) The development of magnetic susceptibility anisotropy through crystallographic preferred orientation in a calcite rock. Phys. Earth Planet. Inter 16:215-222
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Ruer, D. (1976) Methode vectorielle d'analyse de la texture. These, Univ. de Metz
Ruer, D., Baro, R. (1977) A new method for the determination of the texture of materials of cubic structure from incomplete reflection pole figures. Adv. X-Ray Analys. 20:187-200
Siemes, H. (1977) Fabric analysis and fabric development in ores. Geol. Foren. Stockh. Forh. 99:172-185
Stacey, F.D. (1960) Magnetic anisotropy of igneous rocks. J. Geophys. Res. 65:2429-2442
Uyeda, S., Fuller, M.D., Belshe, J.C., Girdler, R.W. (1963) Anisotropy of magnetic susceptibility of rocks and minerals. J. Geophys. Res. 68:279-291
Yadon, A. (1981) Generalisation et optimisation de la methode vectorielle d'analyse de la texture. These, Univ. de Metz
Zapletal, K. (1983) Some magnetic properties of magnetite and hematite measured in weak magnetic fields (in Czech). Unpublished report of Geofyzika Brno
Esling, C., Wagner, F., Baro, R., Englander, M. (1978) Textures of iron oxides and topotactical relationships. In: Textures of materials, G. Gottstein and K. Lucke, eds.: Proceedings of the Fifth International Conference on Textures of Materials, pp 221-230, Vol. II
Hargraves, R.B. (1959) Magnetic anisotropy and remanent magnetism in hemo-ilmenite from ore deposits at Allard Lake, Quebec, Jour. Geophys. Res. 64:1565-1578
Hennig-Michaeli, Ch. (1976) Mikroskopische Gefugeuntersuchungen an experimentell und naturlich verformten Hamatiterzen. Diss. RWTH Aachen, 225 pp
Hrouda, F. (1980) Magnetocrystalline anisotropy of rocks and massive ores: a mathematical model study and its fabric implications. J. Struct. Geol. 2:459-462
Jelinek, V. (1977) The statistical theory of measuring anisotropy of magnetic susceptibility of rocks and its application. Geofyzika Brno, 88 pp
Jelinek, V. (1980) Kappa bridge KL Y-2. A precision laboratory bridge for measuring magnetic susceptibility of rocks (including anisotropy). Leaflet, Geofyzika Brno
Jelinek, V. (1981) Characterization of magnetic fabric of rocks. Tectonophysics 79:563-567
Owens, W.H. (1974) Mathematical model studies on factors affecting the magnetic anisotropy of deformed rocks. Tectonophysics 24:115-131
Owens, W.H., Rutter, E.H. (1978) The development of magnetic susceptibility anisotropy through crystallographic preferred orientation in a calcite rock. Phys. Earth Planet. Inter 16:215-222
Parma, J. (1980) Torque magnetometer (in Czech). Report of Geofyzika Brno, 25 pp
Porath, H. (1968) The magnetic anisotropy of Yampi Sound hematite ores. Pure Appl. Geophys. 69:168-178
Porath, H., Chamalaun, F.H. (1966) The magnetic anisotropy of hematite bearing rocks. Pure Appl. Geophys. 64:81-88
Ruer, D. (1976) Methode vectorielle d'analyse de la texture. These, Univ. de Metz
Ruer, D., Baro, R. (1977) A new method for the determination of the texture of materials of cubic structure from incomplete reflection pole figures. Adv. X-Ray Analys. 20:187-200
Siemes, H. (1977) Fabric analysis and fabric development in ores. Geol. Foren. Stockh. Forh. 99:172-185
Stacey, F.D. (1960) Magnetic anisotropy of igneous rocks. J. Geophys. Res. 65:2429-2442
Uyeda, S., Fuller, M.D., Belshe, J.C., Girdler, R.W. (1963) Anisotropy of magnetic susceptibility of rocks and minerals. J. Geophys. Res. 68:279-291
Yadon, A. (1981) Generalisation et optimisation de la methode vectorielle d'analyse de la texture. These, Univ. de Metz
Zapletal, K. (1983) Some magnetic properties of magnetite and hematite measured in weak magnetic fields (in Czech). Unpublished report of Geofyzika Brno