Tectonic applications of magnetic susceptibility and its anisotropy

Borradaile, Graham J.; Bernard, Henry

doi:10.1016/s0012-8252(96)00044-x

Cited by 709 publications

(478 citation statements)

References 134 publications

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“…4a, b). Hrouda (1982), Tarling and Hrouda (1993), Borradaile and Henry (1997), Tauxe (2002), Martín-Hernández et al (2004), Cho et al, (2007Cho et al, ( , 2014, (Jelínek, 1981;Hrouda, 1982;Tarling and Hrouda, 1993 (Rochette et al, 1992;Tarling and Hrouda, 1993;Bouchez, 1997). 각 시편에서 측정된 평균대자율을 각 석산별로 상 용로그 값으로 나타내었으며 (Fig.…”

Section: 지질학적 배경mentioning

confidence: 95%

Determination of Rock Cleavages Using AMS (Anisotropy of Magnetic Susceptibility): a Case Study on the Geochang Granite Stone, Korea

Cho¹,

Kim²,

Kim³

et al. 2015

The Journal of the Petrological Society of Korea

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In granite quarry, stones are generally quarried along easily separating planes called as 'rock cleavage'. Because orientation and characteristics of the rock cleavage are directly involved with easy quarrying, it is the most important factor on selecting a direction of digging. Using AMS (anisotropy of magnetic susceptibility), we attempt to interpret rock fabrics in Geochang Granite Stone (JS, SD, AR, GD, BW, MD quarry) and discuss about determination of rock cleavages and correlation between the rock fabrics and cleavages. Based on mean susceptibility, thermo-susceptibility curves, and hysteresis parameters, Ti-poor MD and/or PSD magnetites are the main contributor to AMS of the granite stones. The systematic magnetic foliations with sub-vertical dip angle are developed in the whole granite quarries. In most of the granite quarries, the magnetic foliations are significantly consistent with grain plane. In the BW quarry, which has higher P J values than the others, the magnetic foliations coincide exceptionally with

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Section: 지질학적 배경mentioning

confidence: 95%

Determination of Rock Cleavages Using AMS (Anisotropy of Magnetic Susceptibility): a Case Study on the Geochang Granite Stone, Korea

Cho¹,

Kim²,

Kim³

et al. 2015

The Journal of the Petrological Society of Korea

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“…Hysteresis loop method was used to identify the magnetic mineral composition For rocks whose AMS is dominated by weakly anisotropic paramagnetic silicates the symmetry of AMS maybe a more faithful reflection of petrofabric symmetry, although this can depend on the symmetry of the dominant minerals. This is an influence of crystal symmetry on magnetic properties, independent of any tectonic effect (Borradaile and Henry, 1997;.…”

Section: Magnetic Fabricsmentioning

confidence: 96%

“…The AMS is a powerful tool to investigate the internal structure of plutons where the macroscopic preferred mineral orientation is absent (e.g. Hrouda 1982;Jackson and Tauxe 1991;Tarling and Hrouda 1993;Borradaile and Henry 1997;Bouchez 1997Bouchez , 2000Borradaile and Jackson 2004). Hence, together with textural information, AMS method allows to study fabrics which have recorded regional deformations that were imposed on the crystallizing magma and on the cooling rock.…”

Section: Magnetic Fabricsmentioning

confidence: 99%

Gravity inversion, AMS and geochronological investigations of syntectonic granitic plutons in the southern part of the Variscan French Massif Central

Joly

Faure

Martelet

et al. 2009

Journal of Structural Geology

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“…Magnetic foliation (K1 and K2 posed surface) and foliation, cleavage and bedding is consistent. The orientation of K3 is perpendicular to these foliation [30,32,36,[38][39][40].…”

Section: Tectonic Principal Stress Orientationmentioning

confidence: 99%

Characteristics of Metamorphic Rock Magnetic Fabrics in the Nyalam Area of the Southern Tibet and Its Geological Significance, China

Guang-fu¹,

Zou²,

Mao³

et al. 2015

JEASE

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This paper reports Precambrian rock magnetic fabrics in the Nyalam area of southern Tibet. The analytical results of magnetic fabrics show that the values of H are high (> 10% in general), so the ductile deformations of the Precambrian rock are strong. The orientation of the maximum principal stress inferred from the minimum magnetic susceptibility is nearly S-N, NE-SW and NW-SE. The Flinn diagram of the magnetic fabrics show that the strain pattern is oblate and constrictional type. Magnetic foliation of great majority of rock samples is well developed and the magnetic lineation is poor and the magnetic susceptibility ellipsoid is flattened. The magnetic lineation of the minority rock samples is well developed and the magnetic foliation is poor and the magnetic susceptibility ellipsoid is prolate. According to the geological field and the magnetic fabrics, there are 3 times tectonic stress field in SN directed extruding, NW-SE directed extruding, NW-SE directed extension. It shows that the Nyalam area has undergone process the orientation of SN, NW-SE nappe structure and NW-SE directed extension structure. The change of tectonic stress is reflected by the field characteristics of the Precambrian rock magnetic fabrics that is the direct responding result of the arc-continental, continent-continental collision between the India and Asian continents in the late part of the Late Cretaceous to Late Eocene and subsequently shifted to intra-continental convergent, the plateau uplifting and extension structure stage since the Late Eocene.

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Tectonic applications of magnetic susceptibility and its anisotropy

Cited by 709 publications

References 134 publications

Determination of Rock Cleavages Using AMS (Anisotropy of Magnetic Susceptibility): a Case Study on the Geochang Granite Stone, Korea

Determination of Rock Cleavages Using AMS (Anisotropy of Magnetic Susceptibility): a Case Study on the Geochang Granite Stone, Korea

Gravity inversion, AMS and geochronological investigations of syntectonic granitic plutons in the southern part of the Variscan French Massif Central

Characteristics of Metamorphic Rock Magnetic Fabrics in the Nyalam Area of the Southern Tibet and Its Geological Significance, China

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