Magnetic susceptibility anisotropy, strain, and progressive deformation in Permian sediments from the Maritime Alps (France)

Kligfield, Roy; Owens, William; Lowrie, William

doi:10.1016/0012-821x(81)90097-2

Cited by 186 publications

(76 citation statements)

References 19 publications

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“…Quxiang Formation has eight sampling sites, sampling sites numbered MA1-MA8 and 120 specimens; Jiangdong Formation has a sampling sites (MA9) and 12 specimens; Rouqiecun group has two sampling sites, number of MA10, MA11 and 41 specimens; the main detachment faces of South Tibetan detachment system has two sampling sites, numbered MZ1, MZ2 and 102 specimens; A total of thirteen points and 241 samples were collected specimens. In the laboratory, the orientation of the core sample was cut into high 22 …”

Section: Samples and Testingmentioning

confidence: 99%

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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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Section: Samples and Testingmentioning

confidence: 99%

“…The use of magnetic fabric of rock deformation and tectonic deformation process is a new method of structural geology. Many scholars of international have studied and accumulated a certain amount of information in this area [22][23][24][25][26].…”

Section: Introductionmentioning

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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“…Studies have addressed the tectonic fabric [Guardia and Ivaldi, 1985], the geometric characteristics of the strain ellipsoid [Graham, 1978 ;Siddans et al, 1984] and cleavage related magnetic anisotropy [Bogdanoff and Schott, 1977 ;Kligfield et al, 1981 ;Siddans et al, 1984]. Only one previous study carried out by Aicard et al [1968] demonstrated syn-depositional normal faulting and its subsequent control on Alpine deformation in the upper Roya district : it is surprisingly one of the less referred-to works.…”

Section: Analysis Of the Geological Contextmentioning

confidence: 99%

“…The strike of the cleavage changes from N130 o in the Barrot Massif to the west, to N090 o in the Roya Valley to the east, and the dip angle varies greatly from 30 o E to almost vertical. A progressive strain path has been proposed based on the analyses of reduction spots, assumed to be compaction-derived and flattened (oblate) parallel to bedding prior to Alpine deformation [Graham, 1978 ;Siddans et al, 1984], as well as from studies of anisotropy of magnetic susceptibility [Henry, 1973 ;Kligfield et al, 1981]. Despite shear surfaces parallel to cleavage observed by Graham [1978, p 220], the progressive deformation proposed by these authors is based on an irrotational model of finite strain and assumes the shortening axis always developed normal to cleavage [Graham, 1978 ;Kligfield et al, 1981 ;Siddans et al, 1984].…”

Section: Analysis Of the Geological Contextmentioning

confidence: 99%

Control of Permian and Triassic faults on Alpine basement deformation in the Argentera massif (external southern French Alps)

Delteil¹,

Stéphan²,

Attal³

2003

Bulletin De La Société Géologique De France

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Abstract. -Structural investigations reveal intense and heterogeneous deformation of the sedimentary cover attached to the basement complex of the southern Argentera and Barrot massifs (southernmost External Basement Massifs of the French Alps). Permian and early Triassic syn-depositional extensional tectonics imparted a tilted block pattern to the massifs. An early Miocene first stage of Alpine compression caused pervasive cleavage. This cleavage was controlled by the former pre-existing faults but is nevertheless consistent with NNE contraction. Where regional shortening is orthogonal to the trend of pre-existing faults the pervasive deformation produced either irrotational compressional strain (where no fault inversion occurred), or rotational compressional strain involving syn-cleavage shearing (where faults with favorable paleo-dip were inverted). Where the shortening direction is oblique to the paleo-fault trends, a component of strike-slip movement may locally prevail. A 22 %, N020 o directed horizontal shortening, of 11 km, has been calculated based on deformed sedimentary markers in the Permian series and parallel folds in Lower Triassic quartzite. A shallower deformation as brittle reverse faults postdates the cleavage at the southwestern tip of the Argentera Massif and accounts for 4 km of extra shortening. Both types of deformation are connected at depth to a crustal blind thrust system and the Argentera Massif is over-thrust to the south-southwest. The observed strain indicates the Argentera Massif area underwent, from earliest Miocene to Present, a NNE to N rotating compression at distance from the left-lateral southwestern boundary of the Adria block. Contrôle de failles permiennes et triasiques sur la déformation alpine du socle dans le massif de l'Argentera (Alpes externes méridionales françaises)Mots clés. -Alpes françaises, Massifs externes, Argentera, Déformation de socle, Polyphasage, Failles, Schistosité, Contexte géody-namique.Résumé. -L'étude structurale du tégument des massifs de l'Argentera et du Barrot (massifs de socle les plus méridio-naux des Alpes françaises externes) met en évidence l'intensité et l'hétérogénéité de la déformation. Des failles synsédi-mentaires d'âge permien et triasique inférieur ont découpé ces massifs en une série de blocs basculés. Une première phase de compression alpine a engendré une schistosité pénétrative. Cette schistosité a été contrôlée par les failles héritées précédentes, mais reste néanmoins cohérente avec une direction de serrage NNE. Lorsque la direction du raccourcissement régional est orthogonale aux failles héritées, la déformation syn-schisteuse est soit associée à une défor-mation de type irrotationnel sans inversion tectonique, soit à une déformation rotationnelle avec cisaillement synschisteux là où les failles présentant des paléo-pendages favorables ont été inversées. Lorsque le raccourcissement régional s'est exercé obliquement sur les failles héritées, une composante de mouvement coulissant prédomine. Des marqueurs sédimentaires déformé...

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“…The analysis of the AMS data was performed using the Anisoft 4.2 software. Many authors have reported that magnetic fabric provides a reliable strain indicator (Ferré et al, 2004;Graham, 1966;Henry, 1973;Hrouda, 1979Hrouda, , 2002Hrouda and Janak, 1976;Hrouda et al, 1978;Kligfield et al, 1982). The AMS of volcanic rocks was investigated in the East Carpatians (Panaiotu et al, 2011).…”

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confidence: 99%

Geochronology and Palaeomagnetic Records of the Snaigupėlė Section in South Lithuania

et al. 2015

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Abstract:The interglacial deposits in the South Lithuanian Snaigupėlė outcrop and borehole Snaigupėlė-705 are marked for different bedding conditions though the sections are in proximity of each other. In the borehole section, the interglacial deposits are thicker and bedding at a greater depth than the analogous deposits of the outcrop. In the Snaigupėlė outcrop, the highest compatibility of isochronic-correction dates, calculated using L/L (method of leaching) and TSD (method of total sample dissolution) models, was determined for combination of three samples. With the help of the f value (section of isochrones in the axis of ordinates), the contribution of the primary pollution with thorium was determined where, as based on corrected analytical data, isochronic-correction dating was performed:

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Magnetic susceptibility anisotropy, strain, and progressive deformation in Permian sediments from the Maritime Alps (France)

Cited by 186 publications

References 19 publications

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

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

Control of Permian and Triassic faults on Alpine basement deformation in the Argentera massif (external southern French Alps)

Geochronology and Palaeomagnetic Records of the Snaigupėlė Section in South Lithuania

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