ANISOTROPY OF MAGNETIC SUSCEPTIBILITY:THEORY AND CASE STUDIES
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摘要:
磁化率各向异性（AMS）在地质领域中的应用极为广泛，可以用来研究古流向造成的磁性矿物的定向排列，以及构造应力作用引起的岩石内磁性矿物的定向重结晶、定向排列及韧性变形。本文介绍了AMS的基本原理和参数，并并介绍了前人及作者应用AMS详细分析研究了二个实例：（1）以假多畴（MD）高钛磁铁矿为主要载磁矿物的玄武岩样品的AMS变化及其对构造运动的响应；（2）以MD磁铁矿为主要载磁矿物的湖泊沉积物样品在沉积过程中AMS变化。AMS可以灵敏地检测样品中磁性矿物的定向排列，因此在在地质领域中具有很好的应用前景。
Abstract:Anisotropy of magnetic susceptibility (AMS) has been widely utilized to study orientation of magnetic minerals due to the paleo-flow, and direction of magnetic minerals or their recrystallization caused by tectonic stress. We presented the AMS principle and parameters, and studied AMS changes in:(1) two basalt samples (unheated and heated) that have experienced tectonic deformation, with multidomain (MD) titanomagnetite as dominant magnetic minerals, and this is from a previous study; (2) lake sediments that are majorly characterized by MD magnetite. The results show that AMS can sensitively investigate orientation of magnetic minerals.
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Key words:
- anisotropy of magnetic susceptibility (AMS) /
- magnetite /
- basalt /
- lake sediment /
- rock magnetism
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[1] CAÑÓN-TAPIA E. Factors affecting the relative importance of shape and distribution anisotropy in rocks:theory and experiments[J]. Tectonophysics, 1997, 340:117-131. https://link.springer.com/article/10.1007/s11200-015-0675-6
[2] 张拴宏, 周显强.磁化率各向异性地学应用综述[J].地质论评, 1999, 45(6):613-620. http://www.cnki.com.cn/Article/CJFDTOTAL-DZLP199906010.htm
[3] BORRADAILE G J, JACKSON M. Anisotropy of magnetic susceptibility (AMS):Magnetic petrofabrics of deformed rocks[J]. Geol. Soc. Lond. Spec. Publ., 2004, 238:299-360. doi: 10.1144/GSL.SP.2004.238.01.18 https://experts.umn.edu/en/publications/anisotropy-of-magnetic-susceptibility-ams-magnetic-petrofabrics-o
[4] JACKSON M. Anisotropy of magnetic remanence:a brief review of mineralogical sources, physical origins, and geological applications, and comparison with susceptibility anisotropy[J]. Pure and Applied Geophysics, 1991, 136(1):1-28. doi: 10.1007/BF00878885 https://link.springer.com/article/10.1007/BF00878885
[5] RAPOSO M I B, BERQUÓ T S. Tectonic fabric revealed by AARM of the proterozoic mafic dike swarm in the Salvador city (Bahia State):São Francisco Craton, NE Brazil[J]. Phys. Earth Planet. Inter., 2008, 167:179-194. doi: 10.1016/j.pepi.2008.03.012 https://link.springer.com/chapter/10.1007/978-94-007-0323-0_17/fulltext.html
[6] CAÑÓN-TAPIA E, WALKER G P L, HERRERO-BERVERA E. The internal structure of lava flows-insights from AMS measurements (Ⅰ):Near-vent a'a.[J]. J. Volcanol. Geotherm. Res., 1996, 70:21-36. doi: 10.1016/0377-0273(95)00050-X https://academic.oup.com/gji/article/193/2/585/632112/Internal-structure-of-basalt-flows-insights-from
[7] HARGRAVES R B, JOHNSON D, CHAN C Y. Distribution anisotropy:The cause of AMS in igneous rocks?[J]. Geophys. Res. Lett., 1991, 18:2193-2196. doi: 10.1029/91GL01777 http://link.springer.com/chapter/10.1007%2F978-94-017-9652-1_7
[8] GAILLOT P, DE SAINT-BLANQUAT M, BOUCHEZ J L. Effects of magnetic interactions in anisotropy of magnetic susceptibility:Models, experiments and implications for igneous rock fabrics quantification[J]. Tectonophysics, 2006, 418:3-19. doi: 10.1016/j.tecto.2005.12.010 https://www.deepdyve.com/lp/elsevier/contents-Eg93B0j0Lv
[9] GRÉGOIRE V, DARROZES P, GAILLOT P, et al. Magnetite grain shape fabric and distribution anisotropy vs rock magnetic fabric:A three-dimensional case study[J]. J. Struct. Geol., 1998, 20(7):937-944. doi: 10.1016/S0191-8141(98)00022-4 http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.28.370
[10] TARLING D H, HROUDA F. The magnetic anisotropy of rocks[M]. London:Chapman & Hall, 1993:1-217.
[11] ELLWOOD B B. Flow and emplacement direction determined for selected basaltic bodies using magnetic susceptibility anisotropy measurements[J]. Earth Planet. Sci. Lett., 1978, 41:254-264. doi: 10.1016/0012-821X(78)90182-6 https://link.springer.com/article/10.1007/BF02600385
[12] JELINEK V. Characterization of the magnetic fabric of rocks[J]. Tectonophysics, 1981, 79:63-67. doi: 10.1016/0040-1951(81)90110-4 http://d.wanfangdata.com.cn/NSTLQK_10.1016-0040-1951(81)90110-4.aspx
[13] HROUDA F. Magnetic anisotropy of rocks and its application in geology and geophysics[J]. Geophys. Surv., 1982, 5:37-82. doi: 10.1007/BF01450244 https://link.springer.com/article/10.1007/BF01450244
[14] CAÑÓN-TAPIA E. AMS parameters:Guidelines for their rational selection[J]. Pure and Applied Geophysics, 1994, 142:365-382. doi: 10.1007/BF00879310 http://www.spe.org/dl/docs/2008/Ott.pdf
[15] ZHANG S W. Magnetic anisotropy of igneous rocks from the Taimyr peninsula, Arctic Russia. Unpublished M.Sc Thesis, University of Bergen. 132 pp.
[16] INGER S, SCOTT R A, GOLIONKO B G. Tectonic evolution of the Taimyr Peninsula, northern Russia:Implications for Arctic continental assembly[J]. Journal of the Geological Society, 1999, 156:1069-1072. doi: 10.1144/gsjgs.156.6.1069 https://core.ac.uk/display/195570
[17] WALDERHAUG H J, EIDE E A, SCOTT R A, et al. Palaeomagnetism and 40Ar/39Ar geochronology from the South Taimyr igneous complex, Arctic Russia:A Middle-Late Triassic magmatic pulse after Siberian flood-basalt volcanism[J]. Geophys. J. Int., 2005, 163:1-17. doi: 10.1111/gji.2005.163.issue-1 http://sp.lyellcollection.org/rss/current.xml
[18] 张淑伟, WALDERHAUG H J, 杨跃俊, 等.俄罗斯北部泰米尔半岛褶皱带岩床和玄武岩岩石磁学及磁各向异性[J].科学通报, 2008, 53(2):229-237. http://www.cnki.com.cn/Article/CJFDTOTAL-KXTB200802016.htm
ZHANG Shu-wei, WALDERHAUG H J, YANG Yue-jun, et al. Rock magnetism and magnetic anisotropy in folded sills and basaltic flows:A case study of volcanics from the Taimyr Peninsula, Northern Russia[J]. Chinese Science Bulletin, 2008, 53:759-767. http://www.cnki.com.cn/Article/CJFDTOTAL-KXTB200802016.htm
[19] ZHANG S W, CAÑÓN-TAPIA E, WALDERHAUG H J. Magnetic fabric and its significance in the sills and lava flows from Taimyr fold-belt, Arctic Siberia[J]. Tectonophysics, 2011, 505:68-85. doi: 10.1016/j.tecto.2011.04.004 https://www.researchgate.net/profile/Shuwei_Zhang2/publications
[20] ROBERT D, HATCHER J R. Structural geology:Principles, concepts, and problems. Merrill Publishing Company and A Bell & Howell Information Company, Columbus Toronto London Melbourne.
[21] DE WALL H, WARR L N. Oblique magnetic fabric in siderite-bearing pelitic rocks of the Upper Carboniferous Culm Basin, SW England:An indicator for paleo-fluid migration?[J]. Geol. Soc. Lond. Spec. Publ., 2004, 238:493-507. doi: 10.1144/GSL.SP.2004.238.01.25 https://es.scribd.com/doc/216009829/DICCIONARIO-PETROLERO
[22] HENRY B, PLENIER G, CAMPS P. Post-emplacement tilting of lava flows inferred from magnetic fabric study:the example of Oligocene lavas in the Jeanne d'Arc Peninsula (Kerguelen Islands)[J]. J. Volcanol. Geotherm. Res., 2003, 127:153-164. doi: 10.1016/S0377-0273(03)00198-7 https://academic.oup.com/gji/article-abstract/160/1/63/713608/Determination-of-flow-directions-by-combining-AMS
[23] REES A I. The use of anisotropy of magnetic susceptibility in the estimation of sedimentary fabric[J]. Sedimentology, 1965, 4(4):257-271. doi: 10.1111/sed.1965.4.issue-4 https://link.springer.com/article/10.1007/BF01820949
[24] ELLWOOD B B. Sample shape and magnetic grain sizes:two possible controls on the anisotropy of the magnetic susceptibility variability in deep-sea sediments[J]. Earth Planet. Sci. Lett., 1979, 43:309-314. doi: 10.1016/0012-821X(79)90216-4 https://link.springer.com/article/10.1007/BF00369152
[25] LAKSHMI B.V., SATYANARAYANA K.V.V., BASAVAIAH N., GAWALI P. Anisotropy of magnetic susceptibility of earthquake-affected soft sediments:example from Ther village, Latur, Maharashtra, India[J]. Current Science, 2015, 108(4):708-712. http://www.currentscience.ac.in/php/toc.php?vol=108&issue=04
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