Methode de determination graphique des directions de raccourcissement, d'allongement et intermediaire d'une population de failles

Arthaud, F.

doi:10.2113/gssgfbull.s7-xi.5.729

Cited by 150 publications

(53 citation statements)

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“…Fault orientation and motion data have been further analysed by determining the orientations of the striation movement planes (Fig. 7,inset) (Arthaud 1969;Mattauer 1973;Angelier 1978;Sp(rli & Anderson 1980;Aleksandrowski 1985). These have been used to infer the local paleostress conditions during fault motion (Fig.…”

Section: Fibre Striationsmentioning

confidence: 99%

Late Cenozoic thrust tectonics, Picton, New Zealand

Nicol

Campbell

1990

New Zealand Journal of Geology and Geophysics

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In the Marlborough Sounds area near Picton. multiple deformation during the Miocene produced early (D 1 ) north-northeast-trending folds, and north-and east-striking thrusts. Later folding (D0 about east-west axes led to the formation of basin and dome interference structures. During D 1 • Mesozoic rocks of the Marlborough Schist and PermianTriassic Pelorus Group were thrust over an Oligocene sedimentary sequence. which is now exposed as erosional inliers.Thrust transport from west to east is inferred from fibre striations. Striation-derived M-axis data, calcite grain fabric studies, and the maximwn shortening direction of northnortheast-trending folds suggest that thrusting developed in association with approximate west-east compression. Thrust motion resulted in progressive late Cenozoic stacking of the basement sequence in this area, with considerable shortening and thickening of the Marlborough Sounds region.

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Section: Fibre Striationsmentioning

confidence: 99%

Late Cenozoic thrust tectonics, Picton, New Zealand

Nicol

Campbell

1990

New Zealand Journal of Geology and Geophysics

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“…The odd axis construction is similar to the M-plane method of Arthaud (1969), in which the orientations of the principal strains ɛ X ≥ ɛ y ≥ ɛ Z , and their ratios, are given by the geometry of the planes linking the pole to slip surfaces and their slip direction (movement planes). Except for the thrust fault, the coal seams have normal separations on all faults over their entire surfaces, and have been assumed to be purely dip slip; there is no evidence suggesting any horizontal component of slip, or of reactivation.…”

Section: Elsevier_tecto_126344mentioning

confidence: 99%

Scaling, kinematics and evolution of a polymodal fault system: Hail Creek Mine, NE Australia

et al. 2014

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Polymodal fault systems are sets of faults in three or more orientations that formed in relation to a common state of strain. The importance of polymodal fault systems was first demonstrated by Oertel (1965) in a series of remarkable experiments on clay deformed in a three-dimensional strain state, including measurements of both displacements and stress. He outlined a theoretical framework for the development of four sets of faults, which were related to the principal strain rate axes by symmetry arguments and tensor geometry. Oertel''s work was followed up a decade later by Reches (1978Reches ( , 1983, Aydin and Reches (1982) and Reches and Dieterich (1983), who produced field and experimental evidence for polymodal fault sets, and analysed the strain associated with their formation. Krantz (1988) documented polymodal faults and showed how strain states could be inferred from field measurements by the "Odd Axis" method. Subsequently, Healy et al. (2006a, b) drew attention to the existence of non-Andersonian, polymodal fault sets, and proposed a model for their formation based in crack tip interactions. Fig. 1 displays the differences between conjugate faults predicted by Andersonian fault theory, and a polymodal fault geometry.Scaling, kinematics and evolution of a polymodal fault system: Hail Creek Mine, NE Australia AbstractWe analyse a system of normal faults that cut cuts sandstone , siltstone , mudstone, coal, and tuff at Hail Creek Coal Mine in the Bowen Basin, NE Australia. Our detailed mapping utilized utilised the dense borehole network and strip mining operations. The fault surfaces have complex geometries, yet the components of the individual faults show similar orientation variability to the whole fault system. The faults and their components dip to the SE, NW, NNW, and SSE with an orthorhombic symmetry that we refer to as polymodal. There are multiple displacement peaks, with complementary changes on adjacent faults. This observation suggests kinematic coherence between neighbouring faults.Twin displacement peaks on some faults suggest that segment linkage occurred on a scale of hundreds of m. These polymodal faults follow the same displacement --length scaling laws as other normal faults. Fault dip is affected by lithology, with steeper dips in more competent (sandstone) beds. An 'odd axis' construction using whole fault planes suggests that they formed in a triaxial strain state (three different principal strains) with vertical shortening, and horizontal extension along principal directions of 148° and 058°. Odd axis constructions using individual fault components, as opposed to whole faults, give similar principal strain orientations and maximum strain ratios. The variable component orientations, and the consistency of fault kinematics on different scales, suggest that the faults evolved by the propagation or linkage of smaller components with variable orientations, within the same bulk strain state.Keywords: Normal fault; Orthorhombic fault; Polymodal fault; Displacement--length scaling; Coal...

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“…Desenvolveu-se um método de construção de estria virtual considerando a mecânica de deformação pelos critérios de Mohr-Coulumb e os princípios geométricos de análise de paleotensões de Arthaud (1969) onde as estrias correspondem à projeção da direção principal da deformação, em cada plano de falha. Assim, para as situações observadas em campo cuja cinemática foi interpretada por indicadores cinemáticos que não eram estrias (fraturas escalonadas, steps, por exemplo), a direção de estrias foi estimada a partir de relações geométricas das fraturas Riedel.…”

Section: Geologia Estruturalunclassified

Registro da deformação pós-paleozóica na Bacia do Amazonas, região de Itaituba (PA)

Santos¹,

Mancini²,

Rostirolla³

et al. 2011

RBG

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Revista Brasileira de GeociênciasThais Borba Santos et al. 41(1): 95-107, março de 2011 Arquivo digital disponível on-line no site www.sbgeo.org.br 95Registro da deformação pós-paleozóica na Bacia do Amazonas, região de Itaituba (PA) Resumo A Bacia do Amazonas compreende uma área de aproximadamente 500.000 km 2 abrangendo parte dos estados do Pará e Amazonas. A região estudada localiza-se na porção sudoeste da bacia, próximo à cidade de Itaituba (PA), e contém rochas da cobertura sedimentar fanerozóica e do embasamento aflorante na Província Amazônia-Central. A análise estrutural multiescala consistiu da integração da análise de imagens (interpretação de lineamentos em imagens SRTM, com auxílio de dados aeromagnetométricos) e dados de campo para determinação do arcabouço estrutural e caracterização das fases de deformação pós-paleozóicas locais. A partir dos dados das falhas e sistemas de juntas, zonas de cisalhamento, estrias e steps descritos foram realizadas análises estruturais descritivas e cinemáticas. A aplicação de métodos para determinação de paleotensão permitiu estabelecer diferentes direções de esforços compressivos e distensivos. Os resultados indicam pelo menos três fases de deformação atuantes a partir do final do Paleozóico. A primeira fase (F 1 ) apresenta cinemática destral e posição das principais estruturas N60-70E. A tensão máxima (σ 1 ) é compatível com sua deformação compressiva, embora ainda em contexto transcorrente e pode ser relacionada às orogenias responsáveis pela formação do Pangea ao final do Permiano. A fase F 2 caracterizada pela presença de falhas normais de direção NE coincide com a direção geral dos diques cartografados na região e, provavelmente, tem ligação com o magmatismo Penatecaua de idade Jurássica. A fase F 3 está relacionada a um sistema conjugado composto pelas estruturas N50-70W (sinistral) e N60-70E (destral) com direção de σ 1 E-W. Somente esta fase parece ter afetado rochas cenozóicas e, possivelmente, corresponde à propagação de tensões da subducção na região dos Andes. Palavras-chave:Bacia do Amazonas, análise estrutural, Paleozóico. Abstract Deformation pos-paleozoic registry in Amazon Basin, Itaituba (PA) region. The Ama-zon Basin has an area of approximately 500.000 km 2 covering part of the states of Pará and Amazonas. The region studied is located in the southwest portion of the basin (near of Itaituba -PA city) and contains sedimentary rocks of the Fanerozoic cover and the basement in the Amazon Central Province. Structural analysis consisted of multiscale analysis and integration of images analysis (recognition of morphotectonics features in images SRTM, using data from aeromagnetometria) and using data from the field to determine structural framework and define the stages of post-paleozoic strain that hit the area. From the data of failures and systems of joints, shear zones, slickenside and steps found in outcrops, were developed the structural and kinematic analysis. The application of the method to determin the paleostress could to set the posit...

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Methode de determination graphique des directions de raccourcissement, d'allongement et intermediaire d'une population de failles

Abstract: Geometric properties of deformed rock, comparison between observed deformation and theoretical models, examples from France

Cited by 150 publications

References 0 publications

Late Cenozoic thrust tectonics, Picton, New Zealand

Late Cenozoic thrust tectonics, Picton, New Zealand

Scaling, kinematics and evolution of a polymodal fault system: Hail Creek Mine, NE Australia

Registro da deformação pós-paleozóica na Bacia do Amazonas, região de Itaituba (PA)

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