Magnetic fabric interpretation complicated by inclusions in mafic silicates

被引：61

作者：

Lagroix, F ^{[1
]}

Borradaile, GJ ^{[1
]}

机构：

[1] Lakehead Univ, Dept Geol, Thunder Bay, ON P7B 5E1, Canada

来源：

TECTONOPHYSICS | 2000年 / 325卷 / 3-4期

关键词：

anisotropy of anhysteretic remanence magnetization (AARM); anisotropy of magnetic susceptibility (AMS); crystallography; mafic sillicates; petrofabrics;

D O I：

10.1016/S0040-1951(00)00125-6

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The expected relationships between anisotropy of low-field magnetic susceptibility (AMS) and crystal symmetry of mafic silicates are disturbed by the presence of magnetite inclusions. Measurements of AMS, anisotropy of anhysteretic remanence (AARM) and theoretically predicted bulk susceptibilities from chemical composition all favour the exercise of great caution in the interpretation of preferred orientation distributions of silicates from a rock's AMS. These results pertain mainly to the mafic silicates of lower crustal rocks (pyroxene, orthopyroxene, amphibole) and some of their low-grade metamorphic alterations (serpentine, epidote). (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：207 / 225

页数：19

共 46 条

[1] [Anonymous], J GEOMAGN GEOELECTR
[2] BALLARD FJ, 1985, J NUTR GROWTH CANCER, V2, P1
[3] MAGNETIC-PROPERTIES OF BIOTITE MICAS
BEAUSOLEIL, N
LAVALLEE, P
YELON, A
BALLET, O
COEY, JMD
[J]. JOURNAL OF APPLIED PHYSICS, 1983, 54 (02) : 906 - 915
[4] PETROLOGY OF THE GUADALUPE IGNEOUS COMPLEX SOUTH-WESTERN SIERRA NEVADA FOOTHILLS CALIFORNIA
BEST, MG
[J]. JOURNAL OF PETROLOGY, 1963, 4 (02) : 223 - +
[5] BLOXAM TW, 1960, T ROY SOC EDINBURGH, V64, P1
[6] ANISOTROPY OF MAGNETIC-SUSCEPTIBILITY OF SOME METAMORPHIC MINERALS
BORRADAILE, G
KEELER, W
ALFORD, C
SARVAS, P
[J]. PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 1987, 48 (1-2) : 161 - 166
[7] Tilting and transpression of an Archaean anorthosite in northern Ontario
Borradaile, GJ
Lagroix, F
King, D
[J]. TECTONOPHYSICS, 1998, 293 (3-4) : 239 - 254
[8] Magnetic fabrics and anisotropy-controlled thrusting in the Kapuskasing structural zone, Canada
Borradaile, GJ
Werner, T
Lagroix, F
[J]. TECTONOPHYSICS, 1999, 302 (3-4) : 241 - 256
[9] PALEOMAGNETISM CARRIED BY CRYSTAL INCLUSIONS - THE EFFECT OF PREFERRED CRYSTALLOGRAPHIC ORIENTATION
BORRADAILE, GJ
[J]. EARTH AND PLANETARY SCIENCE LETTERS, 1994, 126 (1-3) : 171 - 182
[10] MAGNETIC-ANISOTROPY OF SOME PHYLLOSILICATES
BORRADAILE, GJ
WERNER, T
[J]. TECTONOPHYSICS, 1994, 235 (03) : 223 - 248

← 1 2 3 4 5 →