Alternating field-impressed AMS in rocks
We studied the evolution of anisotropy of magnetic susceptibility (AMS) during stepwise alternating fields (AF) demagnetization on various kinds of rock samples (loess and palaeosols, diorite, granite, gneiss) with very different degree of magnetic anisotropy. The variation of the magnetic fabric ap...
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| Veröffentlicht in: | Geophysical journal international 2007-02, Vol.168 (2), p.533-540 |
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| container_title | Geophysical journal international |
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| creator | Henry, Bernard Jordanova, Diana Jordanova, Neli Hus, Jozef Bascou, Jérôme Funaki, Minoru Dimov, Dimo |
| description | We studied the evolution of anisotropy of magnetic susceptibility (AMS) during stepwise alternating fields (AF) demagnetization on various kinds of rock samples (loess and palaeosols, diorite, granite, gneiss) with very different degree of magnetic anisotropy. The variation of the magnetic fabric appears to be related to both the magnetic fabric before AF demagnetization and to the direction of AF application. The anisotropy change is mainly controlled by the initial magnetic fabric. The more anisotropic is the initial magnetic fabric, the less is the effect of the direction of field application. This can be clearly shown by determination of the difference of the susceptibility ellipsoids after and before AF application. Even for rocks with weak magnetic anisotropy, the effect of the initial AMS is significant. The difference ellipsoids allow in particular cases to point out that the initial magnetic fabric is composite. |
| doi_str_mv | 10.1111/j.1365-246X.2006.03235.x |
| format | Article |
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The variation of the magnetic fabric appears to be related to both the magnetic fabric before AF demagnetization and to the direction of AF application. The anisotropy change is mainly controlled by the initial magnetic fabric. The more anisotropic is the initial magnetic fabric, the less is the effect of the direction of field application. This can be clearly shown by determination of the difference of the susceptibility ellipsoids after and before AF application. Even for rocks with weak magnetic anisotropy, the effect of the initial AMS is significant. 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J. Int</addtitle><description>We studied the evolution of anisotropy of magnetic susceptibility (AMS) during stepwise alternating fields (AF) demagnetization on various kinds of rock samples (loess and palaeosols, diorite, granite, gneiss) with very different degree of magnetic anisotropy. The variation of the magnetic fabric appears to be related to both the magnetic fabric before AF demagnetization and to the direction of AF application. The anisotropy change is mainly controlled by the initial magnetic fabric. The more anisotropic is the initial magnetic fabric, the less is the effect of the direction of field application. This can be clearly shown by determination of the difference of the susceptibility ellipsoids after and before AF application. Even for rocks with weak magnetic anisotropy, the effect of the initial AMS is significant. The difference ellipsoids allow in particular cases to point out that the initial magnetic fabric is composite.</description><subject>alternating field</subject><subject>anisotropy</subject><subject>Earth Sciences</subject><subject>Geophysics</subject><subject>magnetic susceptibility</subject><subject>Sciences of the Universe</subject><issn>0956-540X</issn><issn>1365-246X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNqNkMtOwzAQRS0EEqXwD1khWCTY8SP1gkVB0Ba14lVQxWbkJA64TZNip9D-PQlBXeONLc89M6ODkEdwQOpzMQ8IFdwPmZgFIcYiwDSkPNjsoc6usI86WHLhc4Znh-jIuTnGhBHW66Czfl5pW6jKFO9eZnSe-ma5sto5nXr9ybNnCs-WycIdo4NM5U6f_N1d9HJ7M70e-uP7wei6P_YVo5L7kvZEmqokq-cymqRERVgSmSkd4lDyWEgZR2kcS6rjXkjrckyb3RTDiWBJQrvovO37oXJYWbNUdgulMjDsj6H5q1fnlGD5RersaZtd2fJzrV0FS-MSneeq0OXaAWUhpzQUdbDXBhNbOmd1tutMMDQaYQ6NLWhsQaMRfjXCpkYvW_Tb5Hr7bw4Gd6PmVfN-yxtX6c2OV3YBIqIRh-HsDR6fiHiYvE7hiv4AJWCFzQ</recordid><startdate>200702</startdate><enddate>200702</enddate><creator>Henry, Bernard</creator><creator>Jordanova, Diana</creator><creator>Jordanova, Neli</creator><creator>Hus, Jozef</creator><creator>Bascou, Jérôme</creator><creator>Funaki, Minoru</creator><creator>Dimov, Dimo</creator><general>Blackwell Publishing Ltd</general><general>Oxford University Press (OUP)</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SM</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope><scope>1XC</scope><scope>VOOES</scope></search><sort><creationdate>200702</creationdate><title>Alternating field-impressed AMS in rocks</title><author>Henry, Bernard ; Jordanova, Diana ; Jordanova, Neli ; Hus, Jozef ; Bascou, Jérôme ; Funaki, Minoru ; Dimov, Dimo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4395-9386ddacf24643cd1a70919fae20295b699b7dbb93eb8231a7b30956a40c64cc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>alternating field</topic><topic>anisotropy</topic><topic>Earth Sciences</topic><topic>Geophysics</topic><topic>magnetic susceptibility</topic><topic>Sciences of the Universe</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Henry, Bernard</creatorcontrib><creatorcontrib>Jordanova, Diana</creatorcontrib><creatorcontrib>Jordanova, Neli</creatorcontrib><creatorcontrib>Hus, Jozef</creatorcontrib><creatorcontrib>Bascou, Jérôme</creatorcontrib><creatorcontrib>Funaki, Minoru</creatorcontrib><creatorcontrib>Dimov, Dimo</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Earthquake Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Geophysical journal international</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Henry, Bernard</au><au>Jordanova, Diana</au><au>Jordanova, Neli</au><au>Hus, Jozef</au><au>Bascou, Jérôme</au><au>Funaki, Minoru</au><au>Dimov, Dimo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Alternating field-impressed AMS in rocks</atitle><jtitle>Geophysical journal international</jtitle><addtitle>Geophys. 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| ispartof | Geophysical journal international, 2007-02, Vol.168 (2), p.533-540 |
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| language | eng |
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| source | Wiley Online Library Journals Frontfile Complete; Oxford Journals Open Access Collection |
| subjects | alternating field anisotropy Earth Sciences Geophysics magnetic susceptibility Sciences of the Universe |
| title | Alternating field-impressed AMS in rocks |
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