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Journal articles on the topic 'Isoclinic planes'

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1

Et-Taoui, Boumediene. "Quaternionic equiangular lines." Advances in Geometry 20, no. 2 (2020): 273–84. http://dx.doi.org/10.1515/advgeom-2019-0021.

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AbstractLet 𝔽 = ℝ, ℂ or ℍ. A p-set of equi-isoclinic n-planes with parameter λ in 𝔽r is a set of pn-planes spanning 𝔽r each pair of which has the same non-zero angle arccos $\begin{array}{} \sqrt{\lambda} \end{array}$. It is known that via a complex matrix representation, a pair of isoclinic n-planes in ℍr with angle arccos $\begin{array}{} \sqrt{\lambda} \end{array}$ yields a pair of isoclinic 2n-planes in ℂ2r with angle arccos $\begin{array}{} \sqrt{\lambda} \end{array}$. In this article we characterize all the p-tuples of equi-isoclinic planes in ℂ2r which come via our complex representatio
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2

Et-Taoui, B. "Equi-isoclinic planes of Euclidean spaces." Indagationes Mathematicae 17, no. 2 (2006): 205–19. http://dx.doi.org/10.1016/s0019-3577(06)80016-9.

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3

Blokhuis, Aart, Ulrich Brehm, and Boumediene Et-Taoui. "Complex conference matrices and equi-isoclinic planes in Euclidean spaces." Beiträge zur Algebra und Geometrie / Contributions to Algebra and Geometry 59, no. 3 (2017): 491–500. http://dx.doi.org/10.1007/s13366-017-0374-2.

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4

Wong, Yung-Chow, and Kam-Ping Mok. "Normally related n-planes and isoclinic n-planes in R2n and strongly linearly independent matrices of order n." Linear Algebra and its Applications 139 (October 1990): 31–52. http://dx.doi.org/10.1016/0024-3795(90)90386-q.

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5

Et-Taoui, Boumediene. "Infinite family of equi-isoclinic planes in Euclidean odd dimensional spaces and of complex symmetric conference matrices of odd orders." Linear Algebra and its Applications 556 (November 2018): 373–80. http://dx.doi.org/10.1016/j.laa.2018.07.014.

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6

Yang, Jian Hui, Rong Ling Sun, Zheng Hao Yang, Xin Yang Lin, and Hai Cheng Niu. "Constitutive Relations of Concrete under Plane Stresses Based on Generalized Octahedral Theory." Applied Mechanics and Materials 71-78 (July 2011): 342–52. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.342.

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Continuous (or generalized) octahedral element bodies can be obtained by intercepting a cube with three groups of failure (or yield) planes successively under true triaxial stress state, on which the stresses are twin stresses. Among the resulting polyhedral characteristic element bodies, isoclinal octahedron and orthogonal octahedron are of particular importance. Strength models of continuous octahedrons are then derived by stress analysis to arbitrary inclined sections in three dimensional stress space, and strain models by the principle of strain analysis, so the plane constitutive relation
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7

Morley, C. K., S. Jitmahantakul, C. von Hagke, J. Warren, and F. Linares. "Development of an intra-carbonate detachment during thrusting: The variable influence of pressure solution on deformation style, Khao Khwang Fold and Thrust Belt, Thailand." Geosphere 17, no. 2 (2021): 602–25. http://dx.doi.org/10.1130/ges02267.1.

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Abstract Classic detachment zones in fold and thrust belts are generally defined by a weak lithology (typically salt or shale), often accompanied by high over-pressures. This study describes an atypical detachment that occurs entirely within a relatively strong Permian carbonate lithology, deformed during the Triassic Indosinian orogeny in Thailand under late diagenetic-anchimetamorphic conditions. The key differences between stratigraphic members that led to development of a detachment zone are bedding spacing and clay content. The lower, older, unit is the Khao Yai Member (KYM), which is a d
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8

SRIVASTAVA, DEEPAK C. "Geometrical similarity in successively developed folds and sheath folds in the basement rocks of the northwestern Indian Shield." Geological Magazine 148, no. 1 (2010): 171–82. http://dx.doi.org/10.1017/s0016756810000610.

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AbstractAn intensely deformed gneiss–migmatite terrane and a relatively undeformed granulite–granitoid terrane constitute the bulk of Precambrian basement in the northwestern Indian Shield. This article traces the structural evolution in the gneiss–migmatite terrane, where traditional methods of structural analysis are difficult to apply, and shows how successively developed folds can assume identical geometry and orientation at an advanced stage of progressive ductile shearing. The gneiss–migmatite terrane exemplifies a regional-scale ductile shear zone that preserves the history of polyphase
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9

Hicock, Stephen R., and Aleksis Dreimanis. "Deformation till in the Great Lakes region: implications for rapid flow along the south-central margin of the Laurentide Ice Sheet." Canadian Journal of Earth Sciences 29, no. 7 (1992): 1565–79. http://dx.doi.org/10.1139/e92-123.

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Structural and lithologic data indicate that, while deposited under actively moving ice, considerable portions of three muddy calcareous subglacial tills in the Great Lakes region probably experienced some component of ductile deformation. Viscous till flow and ductile shear are invoked to explain a combination of features such as recumbent isoclinal folds, unlithified sediment clasts, mixed ostracode shells, reversed stone lee ends, girdle and transverse fabrics, irregular stone pavements, fine striae following stone curves, and inconsistent stone striae and a-axes. Deforming, fine-textured s
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10

Borradaile, G., P. Sarvas, R. Dutka, R. Stewart, and M. Stubley. "Transpression in slates along the margin of an Archean gneiss belt, northern Ontario—magnetic fabrics and petrofabrics." Canadian Journal of Earth Sciences 25, no. 7 (1988): 1069–77. http://dx.doi.org/10.1139/e88-104.

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Archean slates along the northern boundary of the Quetico subprovince of the Superior Province show marked variations of the structural facing direction within coplanar primary cleavage surfaces. These are interpreted as being due to sheath folds near the faulted east–west boundary of the slates with the metavolcanic Wabigoon Belt. Sheath folds with axial traces nearly parallel to the belt boundary are macroscopic, primary, and isoclinal and are believed to result from pervasive dextral transpression of the northern margin of the Quetico subprovince. Magnetic fabrics confirm the presence of a
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11

ΑΥΓΕΡΙΝΑΣ, Α., Α. ΚΙΛΙΑΣ, Α. ΚΟΡΩΝΑΙΟΣ, et al. "Cretaceous structural evolution of the Pelagonian crystalline in western Voras Mt (Macedonia, Northern Greece)." Bulletin of the Geological Society of Greece 34, no. 1 (2001): 129. http://dx.doi.org/10.12681/bgsg.16952.

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The kinematic of the Cretaceous deformation and the relationship between deformation and metamorphism of the Pelagonian crystalline was studied in Voras Mt (northern Greece). The Pelagonian crystalline in this area has been subdivided into a lower, core part, consisting mainly of gneissic rocks and schists and an upper, cover part, consistine of schists and quartzites with marble intercalations. Intensely deformed granitic rocks of Upper Paleozoic age intrude the Pelagonian crystalline basement. An S j foliation is the oldest fabric recognized in the Pelagonian crystalline. Sj is mainly define
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12

Beura, D., S. K. Nanda, A. Parida, and L. Pattanayak. "Deformation Episodes in Iron Formation of Eastern Province of North Odisha Iron Ore Craton, Eastern India." Journal of Geosciences Research 8, no. 1 (2023): 38–42. http://dx.doi.org/10.56153/g19088-022-0090-18.

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Banded Iron Formation (BIF), a bi-component rock of the Precambrian period is exposed along with iron ore in distinct geographical entities encircling the North Odisha Iron Ore Craton (NOIOC) in Odisha – Jharkhand states, eastern India. Iron formation of the eastern province is confined to Badampahar-Gorumahisani-Sulaipat belt. The litho assemblages belonging to this Iron Ore Group comprise of banded cherty quartzite, banded magnetite quartzite, banded magnetite grunerite quartzite, tremolite-actinolite schist and fuchsite quartzite. Deformations in phases affected the BIF members and associat
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13

Salve, Vinay V., and Durga P. Mohanty. "Structural Analysis and Petrography of High-Grade Gneisses and Associated Mafic / Ultramafic Dikes Around Salem, Southern India." Journal of Geosciences Research 9, no. 1 (2024): 1–8. http://dx.doi.org/10.56153/g19088-023-0165-45.

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Southern Granulite Terrane (SGT) of India preserves extensive high-grade granulite facies rocks of Archaean and Proterozoic age. The SGT is divided into number of blocks by several suture/shear zone. Structural investigations on the basement gneisses and younger mafic/ultramafic dikes have been carried out within the Salem block which is part of Northern Granulite Block (NGB), north of the Cauvery Suture Zone (CSZ). The present work emphasizes various scale fold styles and other structural patterns of the area, which includes regionally metamorphosed high-grade rocks as basement for the multip
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14

Hnylko, O. M., A. V. Murovska, and M. I. Bohdanova. "STRUCTURAL POSITION AND DISTRIBUTION OF THE LOWER CRETACEOUS BLACK SHALE DEPOSITS WITHIN THE SILESIAN NAPPE OF THE UKRAINIAN CARPATHIANS." Geological Journal, no. 1 (March 25, 2024): 47–61. http://dx.doi.org/10.30836/igs.1025-6814.2024.1.287312.

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The article presents the results of studying the structural position and distribution of potentially oil-generating, organic-enriched Lower Cretaceous black shale deposits of the Shypot Formation, developed within the Silesian Nappe, using the methods of geological mapping and structural analysis. We concluded, that these deposits, which are exposed in the Vicha River basin near the town of Volovets among a continuous field of Oligocene flysch, are the part of the stratigraphic succession of the Silesian Nappe, and they are not a large olistolith or an allochthonous tectonic remnant of another
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15

Cornell, D. H. "Lithostratigraphy of the Copperton Formation, Areachap Group." South African Journal of Geology 122, no. 4 (2019): 561–70. http://dx.doi.org/10.25131/sajg.122.0041.

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Abstract The type area of the Copperton Formation is on the farms Vogelstruisbult 104, Somuspan 105 and Dooniespan 108 in Prieska District. Outcrop is poor and the type material is preserved in exploration borehole cores from the Prieska Copper Mines and the Annex Cu-Zn deposits. It is highly deformed and variably metamorphosed. Thus it is a lithodemic unit, but interpreted as a supracrustal sequence and described as a formation including lithologically distinct members. The Copperton Formation comprises a wide range of rock types including metabasic and intermediate gneisses with minor amount
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16

Et-Taoui, Boumediene. "Equi-isoclinic planes in Euclidean even dimensional spaces." Advances in Geometry 7, no. 3 (2007). http://dx.doi.org/10.1515/advgeom.2007.023.

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17

Betka, Paul, Sharon Mosher, and Keith Klepeis. "Progressive Development of a Distributed Ductile Shear Zone beneath the Patagonian Retroarc Fold-Thrust Belt, Chile." Lithosphere 2022, no. 1 (2022). http://dx.doi.org/10.2113/2022/3820115.

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Abstract The southern Patagonian Andes record Late Cretaceous–Paleogene compressional inversion of the Rocas Verdes backarc basin (RVB) and development of the Patagonian fold-thrust belt (FTB). A ductile décollement formed in the middle crust and accommodated underthrusting, thickening, and tectonic burial of the continental margin (Cordillera Darwin Metamorphic Complex (CDMC)) beneath the RVB. We present new geologic mapping, quartz microstructure, and crystallographic preferred orientation (CPO) fabric analyses to document the kinematic evolution and deformation conditions of the décollement
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