Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 99 for “"Foliation"”.
-
Asymptotically Safe Gravity: from spacetime foliation to cosmology
General Relativity provides a remarkably successful description of gravity in terms of the geometric properties of spacetime. Nevertheless, the quantum nature of matter and the existence of regimes in which the classical description of gravity breaks down suggest that the short-distance behavior of …
-
The Lorenz System Near the Loss of the Foliation Condition
… The reduction requires the existence of a stable foliation. We study a parameter regime where this so-called foliation condition fails for the rst time and, consequently, the Lorenz map no longer accurately represents the dynamics of the full system. To this end, we study how the three-dimensional …
-
Geometric and dynamical properties of Riemannian foliations
Given a Riemannian foliation ${\cal F}$ on a Riemannian manifold M with a bundle-like metric, geometric and dynamical properties of geodesics orthogonal to the leaves of the foliation are studied.
-
The structural evolution of an ancient accretionary prism in the Damara Belt, Namibia
… of the deformation phases is characterised by a foliation. D₁ is associated With pure shear dominated layer-parallel extension characterised by disrupted lithological layering and hedding-parallel foliation S₀+₁. D₃ is defined as deformation related to the formation of an axial-planar S₂ caused by …
-
Symplectic and complex foliations
"Symplectic (not necessarily Riemannian) foliations have a transversely symplectic structure for which many standard results of symplectic geometry have their transverse analogues: the dual bundle to the transverse bundle of a foliation is a manifold with a canonical symplectic foliation, the …
-
Relating deformation fabrics to multiple metamorphic events preserved in metapelites of the Belt-Purcell supergroup in the Snow Peak area of northern Idaho
… within the M1/D1 affected area have the earlier foliation (S1) as the dominant matrix foliation. S1 in these samples was overprinted by S2 which is defined by a crenulation cleavage and/or sheared strain shadows around porphyroblasts that did not transpose S1. Garnet zoning in these samples shows …
-
Lineament and pegmatite mapping using landsat TM imagery and aerial photograph data: Kaseba-Katota Area, Serenje district, Central Zambia
… to intense deformation resulting in strong foliation, recumbent and overturned folding. In places, the rocks seem to have undergone anatexis as indicated by ductile flow structures and heavily silicified layers. The general trend of foliation and schistosity is northeast - southwest. …
-
INTO THE STRUCTURE OF THE PERMIAN DEEP CONTINENTAL CRUST: A MULTISCALE APPROACH TO RECONSTRUCT MIGMATIZATION IN THE VALPELLINE SERIES (DENT BLANCHE TECTONIC SYSTEM, WESTERN ITALIAN ALPS)
… occurred during the development of the regional foliation. Quantitative microstructural and mineral-chemical analyses allow identifying three tectono-metamorphic stages. The first (D1) is associated with an early foliation (S1) preserved within mafic boudins enclosed in migmatitic gneiss. The …
-
Structural studies in a Proterozoic gneiss complex and adjacent cover rocks, west Needle Mountains, Colorado
… and two phases of isoclinal folding and foliation development during D<sub>B</sub>, prior to emplacement of the ca. 1690 Ma plutons. D<sub>BC</sub> deformation caused folding of D<sub>B</sub> fabrics in the gneisses, development of a subvertical, east-striking foliation in the granitoids, …
-
Geology of the Meherrin, Virginia area: tracing formations across the staurolite isograd from the Carolina slate belt into the Charlotte belt
… events are identified. F₁ produced the initial foliation. F₂ produced the dominant penetatrive foliation, isoclinally folding the earlier foliation. F₃ produced a crenulation cleavage. The Hyco and Aaron formations are folded into a tight, steeply southeastward dipping, and slightly refolded …
-
Foliations and exotic index theory
… injective by using the exotic index theorem. The foliation exotic index theorem of S. Hurder is an extension of the theorem of G. Yu to the index theory for the foliations. Using the functorial property of the Kasparov KK-product, the foliation exotic index theorem can be recovered via the …
-
Geology of the Ashe Formation between Fries and Galax, Virginia
… Cranberry Gneiss. The dominant penetrative foliation of the rocks is composed of an early S₁ foliation that is crenulated and transposed by a later S₂ foliation which strikes N 50° E and dips SE. Metamorphic porphyroblast growth of biotite, garnet, staurolite, and kyanite followed …
-
Characterization of Structures and Deformation in the Brittle-Ductile Transition, Western Termination of the Chugach Metamorphic Complex, Southern Alaska
… (CMC) revealed a new D2 structure, the Bremner foliation fan. This structure has a high strain, vertically foliated core, with moderate-shallow dipping cleavages to the north and south which rollover into the core. The fan appears to have propagated from below by a shear-zone at depth …
-
Polyphase tectonics and metamorphism and their relation to movement on the Monte Largo shear zone in the Manzano Mountains, central New Mexico
… of multiple deformation events. The dominant foliation is the northeast-trending S2 that overprints the older S1 foliation in most places. Later S3 fabrics are present in many areas as well as S4 crenulations in rocks from Monte de Abajo Canyon. Petrographic and field studies were performed on …
-
Foliations For Quasi-Fuchsian 3-Manifolds
… curvatures are in (-1, 1), then it admits a foliation such that each leaf is a surface of constant mean curvature. The key method that we use here is volume preserving mean curvature flow.
-
Isochron geometry in the presence of saddle objects
… addresses the question of what such isochron foliations may look like when they are (one-dimensional) curves. It is important to also consider the backward-time isochrons of repelling oscillations. More specifically, we study how the two foliations by forward-time and backward-time isochrons …
-
Analogues of Kähler geometry on Sasakian manifolds
… vector field ( which generates a one-dimensional foliation with a transverse Kihler structure. A differential form a on S is called basic with respect to the foliation if it satisfies [iota][epsilon][alpha] = [iota][epsilon]d[alpha] = 0. If a compact Sasakian manifold S is regular, i.e. a circle …
-
Strain path partitioning during forceful emplacement of the Papoose Flat pluton, Inyo Mountains, CA
… parallel to lineation and perpendicular to foliation, a constant angular relationship is observed between planar porphyroblast inclusion trails and matrix foliation traced around the western margin of the pluton. Unwrapping of the matrix foliation, from concordancy with the pluton margin …
-
Geometry, kinematics and age of the northern half of the White Mountain shear zone, eastern California and Nevada
… by a NNE to NNW-striking steeply dipping foliation and associated shallowly plunging NNE to NW-trending stretching lineations. S-C fabrics observed in outcrop, microstructural shear sense indicators and kilometer-scale foliation geometry all indicate dextral movement. Localized discrete …
-
The Fries Fault near Riner, Virginia: an example of a polydeformed, ductile deformation zone
… concomitant with the development of a mylonitic foliation (S<sub>m</sub>). Ductile deformation processes involving grain elongation, recovery and recrystallization, combined with chemical processes (primarily pressure solution), are the dominant strain-accommodation mechanisms in the formation of …
Page 1 of 5