Showing papers in "Journal of Structural Geology in 2015"

TL;DR: In this paper, the importance of structural geology to slope stability assessment is highlighted, reviewing how structures control slope failure mechanisms, how engineering geologists measure structures and include them in slope stability analyses, and how numerical simulations of slopes incorporate geological structures and processes.

TL;DR: In this article, the authors review the criteria for seismic slip defined by Cowan and determine that they are too narrow, and conclude that seismic slip at rates in the range 10−4−101 ǫm/s is almost certainly dynamic.

TL;DR: The average number of connections per branch provides a measure of connectivity that is almost completely independent of the topology, and the extension of topological concepts to 3-dimensions is discussed.

TL;DR: In this article, Shipton, Euan Macrae, Rebecca Lunn, Andrew Curtis and Rob Butler have discussed uncertainty with numerous people over many years; special thanks to Alan Gibbs for starting me off on an uncertainty track in the first place and for discussions and work with Z.

TL;DR: In this article, the authors reveal the presence of several tectonometamorphic discontinuities in the mid-crust that appear to reflect a continuum of deformation in which both channel-and wedge-type processes operate in spatially and temporally distinct domains within the orogen, and further, that the system may migrate back and forth between these types of behavior.

TL;DR: In this article, the authors use an integrated 3D seismic reflection and borehole dataset to examine a range of fault interactions that occur in a natural multiphase fault network in the northern Horda Platform, northern North Sea in order to determine the range of styles of fault interaction that occur between non-colinear faults.

TL;DR: In this paper, the authors developed a workflow for fracture data collection in a region of heterogeneous fractures in a fold and thrust belt, which they believe has applicability to a wide variety of fracture networks in different tectonic settings.

TL;DR: In this paper, the authors describe the influence of several factors, including tectonic regime, presence of a fault, burial depth, host sandstone porosity, and grain size and sorting for their initiation and permeability.

TL;DR: In this article, the authors used 3D seismic reflection and borehole data from the Sao Paulo Plateau, Santos Basin, offshore Brazil to document the variability in intrasalt structural style in natural salt diapirs.

TL;DR: In this article, a suite of structures developed from inherited (mostly stratification) or introduced (mostly ice veins or fracture traces) fabric elements and from dynamic recrystallization.

TL;DR: In this paper, the authors assess the published evidence, theories and models for polymodal faulting before suggesting ways to produce a truly general and valid failure criterion for triaxial failure.

TL;DR: In this article, the authors deduce the likely mechanisms responsible for the formation of a population of non-colinear faults in the Maloy Slope area of the northern North Sea.

TL;DR: In this paper, a generic scenario may resolve some of these questions, such as how the shear zones develop, how the phases become evenly dispersed, the bulk rheology, and the controls on grain size, are all unclear.

TL;DR: In this article, the Vesterdjupet Fault Zone, one of the basin-bounding normal fault zones of the Lofoten margin (north Norway), evolved over c. 150 Myr as part of the North Atlantic rift.

TL;DR: In this paper, the authors used 2D forward modelling and 3D restorations to determine strain distributions throughout folds of the Achnashellach Culmination, Moine Thrust Belt, NW Scotland.

TL;DR: In this paper, structural and geochronological data, together with other constraints on the timing of deformation suggests that the Irtysh Shear Zone was subjected to three phases of deformations in the late Paleozoic.

TL;DR: In this article, two distinct processes of deformation affecting graphite in fault zones of the Hidaka metamorphic belt, Hokkaido, Japan, are reported, one involves the micrometer-scale delamination (MMD) in the stacking of graphite, and the other is the nanometer-scale deformation process of carbon sheets to less than 10nm.

TL;DR: In this article, the orocline test was applied to a suite of curved orogenic features in the Tasmanides of eastern Australia, including the Charters Towers orocline and the Nackara arc.

TL;DR: In this article, the authors use physical modeling to explain how and why these structures occur and propose a mechanical basis for the kinematic model, which is based on the Rayleigh-Taylor instability.

TL;DR: In this paper, structural studies of the Barmer Basin in Rajasthan, northwest India, demonstrate the important effect that pre-existing faults can have on the geometries of evolving fault systems at both the outcrop and basin-scale.

TL;DR: Fault initiation in granitic and metamorphic rocks was studied in this paper, showing that the strength anisotropy relative to the principal stress directions is strongly influenced by the foliation.

TL;DR: In this article, structural and geochronological data suggest that the two litho-tectonic units were initially detached and located in different crustal levels and experienced distinct phases of deformation under contrasting P-T conditions, and they were mutually accreted with each other in the early Devonian and jointly underwent a WNW-ESE-directed shortening deformational event (D1) at ∼390

TL;DR: In this paper, optical microstructures and electron backscatter diffraction (EBSD) data from samples of quartz layers deflected around garnet porphyroclasts (which generate local stress and strain rate perturbations) during mylonitic deformation in the Alpine Fault Zone of New Zealand.

TL;DR: The authors examined fault rock microstructures in carbonates and found that understanding fault core production helps predict the hydraulic behaviour of faults and the potential for reservoir compartmentalisation, which is important for reservoir management.

TL;DR: In this article, microstructures indicative of frictional viscous flow (FVF) in exhumed phyllonites of the Karakoram Fault Zone (KFZ), NW India were reported.

TL;DR: In this article, the authors explore the highly porous Aztec Sandstone in the footwall to the Muddy Mountain thrust in SE Nevada, which contains several types of deformation bands in the Buffington tectonic window: 1) Distributed centimeter-thick shear-enhanced compaction bands (SECBs), 2) rare pure compaction band (PCBs) in the most porous parts of the sandstone, cut by 3) thin cataclastic sheardominated bands (CSBs) with local slip surfaces.

TL;DR: In this article, the authors introduce a new, purely descriptive terminology for the three categories of intracrystalline deformation microstructures formed in the low-quartz stability field: fine extinction bands, wide extinction bands and localised extinction bands (LEB).

TL;DR: In this paper, the deformation and displacements are transferred between two decollements located at different stratigraphic levels by means of analogue modeling using brittle/viscous, sand/silicone systems.

TL;DR: In this article, the authors show that shear heating may lead to a temperature increase over 5 m.y. of up to 80 ˚ c just below the brittle ductile transition, up to 120 ǫ c just above the Moho, and to thermal boundary zones tens of km wide on either side of the shear zone.