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Showing 1 to 20 of 198 for “"Lithologies"”.
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Aspects of faulting and fracturing in brittle lithologies
… on aspects of brittle deformation in cohesive lithologies. The pursued concept involves multiscale observations carried out on case studies ranging from satellite images and field outcrops down to the scale of microstructural work to describe and isolate feedback characteristics of brittle …
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Geochemical fractionation during melting of sulfide and sulfate bearing mantle lithologies
Earth’s surficial biogeochemical sulfur (S) cycle is connected to the deep sulfur cycle at convergent margins, where, crust and oceanic lithospheric mantle subducts beneath an overriding plate and transporting sulfur and other materials from the surface to the deep Earth. A part of the subducted …
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Calibrating NMR response to capillary pressure curves in fine grained lithologies: Pretty Hill Formation, Otway Basin
… capillary pressure curves in very fine grained lithologies in order to determine whether it is possible to estimate capillary displacement pressures and thereby sealing capacity. Study conclusions are that T2 response in high iron content rock is affected by many factors such as magnetic …
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Advances in Subduction Zone Processes
… to understand the evolution of subducted lithologies have provided a firm foundation in which to apply field work, computational thermodynamic modeling, and geochronological techniques in order to better constraint the Pressure-Temperature-time (P-T-t) paths and dehydration of subducted …
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Petrology and tectonic setting of relatively low temperature eclogites and related rocks in the Dalsfjord area, Sunnfjord, West Norway.
… crustal, eclogite-facies metamorphism of all the lithologies mapped. Relics of early granulite-facies assemblages occur in most lithologies. Bulk-rock geochemistry of Gjorlanger unit lithologies indicates calc-alkaline affinities, resembling magmatic arc rocks but possibly modified during …
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Membrane properties of intact rock cores of Burlington Limestone, Jefferson Dolomite, Darrington Phyllite, and low permeability concrete
… However, little research has been performed on lithologies outside of pure clays. Recently, research focusing on mixed sand and clay membrane properties for engineering applications was performed. Still, literature only suggests the possibilities of membrane properties, osmotic or …
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High-resolution environmental change in the late Jurassic Kimmeridge clay formation
… change, which occurs within laminated lithologies. The material was from new boreholes drilled in Dorset, southern England, for the Rapid Global Geological Events (RGGE) project. Complementary techniques of back scattered electron microscopy, palynology, total organic carbon and atomic …
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Lithologic Controls on Bedrock Channel Morphology in the Buffalo River Basin
… chi gradients of bedrock channels across several lithologies in the Buffalo River Basin reveals disequilibrium in the basin controlled by the presence of a thick interval of Pennsylvanian sandstone that caps many of the plateaus in the basin. Headwater channels beneath the caprock tend to have …
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Genesis And Environmental Position Of The Algal Mounds Of The Stonehenge Formation
… of the sedimentary environments of the major lithologies deposited in the seaway indicate that the Stonehenge beds were deposited in facies mosaic style. Five major lithologic associations have been described and interpreted in this framework. 1. dolostone cycles ... supratidal facies, 2. …
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Hydrocarbon occurrences within the La Popa Basin: Potential source rocks, thermal maturation, and hydrocarbon migration along the La Popa salt weld, La Popa Basin, Ne Mexico
… weld is not uniform, and occurs where upturned lithologies and appreciable amounts of remnant salt are present; Biomarkers within samples collected along the weld suggest a clay-rich source rock for the hydrocarbons. None of the potential source rocks sampled yielded results indicative of a good …
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Using Strontium Isotopes in Conjunction with Major, and Trace Elements to Identify Water/Rock Interaction in the Upper Kittitas County, Washington
The complex bedrock lithologies in the Upper Kittitas County provide an ideal setting for developing isotopic methodology to identify groundwater sources and track flow paths through water-rock interaction. A wide range of 87Sr/86Sr (0.7040 to 0.7068) in surface waters, springs, and groundwater …
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Oceanic lithosphere magnetization : marine magnetic investigations of crustal accretion and tectonic processes in mid-ocean ridge environments
… fault on the seafloor, indicating that these lithologies can systematically record a magnetic signal. Both lithologies have stable remanent magnetization, capable of contributing to the magnetic source layer. The geometry of the polarity boundary changes from the northern to the central …
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Oceanic lithosphere magnetization : marine magnetic investigations of crustal accretion and tectonic processes in mid-ocean ridge environments
… fault on the seafloor, indicating that these lithologies can systematically record a magnetic signal. Both lithologies have stable remanent magnetization, capable of contributing to the magnetic source layer. The geometry of the polarity boundary changes from the northern to the central …
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Sequence Stratigraphy and Resource Assessment of Aux Vases Sandstone in Illinois
… operations, outlining regions where calcareous lithologies of the Aux Vases Sandstone will interfere with Ste. Genevieve Limestone seismic reflection, and creating, in general, a better understanding of depositional systems within a cratonic basin.
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An integrated approach to groundwater exploration using remotely sensed imagery and geophysical techniques: a case study in the Archean basement and Karoo sedimentary basins of Limpopo Province of South Africa
… no exception. Previous attempts to develop the lithologies of Limpopo for groundwater abstraction without the use of sound scientific methodologies resulted in low yielding boreholes and a higher rate of borehole failure. The complexity of the lithologies in the region necessitates the use of …
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Mineral Equilibrium Constraints on the Feasibility of Diffusively-Fluxed Melting in the Continental Crust
… reveal that water-present melting in all target lithologies is confined to the wet solidus and does not extend to temperatures higher than 700–710 ◦C. Melting at suprasolidus conditions does not involve the mechanical flow of a free water phase. Instead, the process is driven by diffusion of H2O …
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A chemical study of the silicate minerals of the Great Gossen Lead and surrounding rocks in southwestern Virginia
… schists and gneisses predominate. Other lithologies include thin layers of hornblende amphibolite, sulfide ore, quartz veins, thin layers of hornblendic gneiss, marble lenses and minor solution cavities. The coarser-grained ore zone lithologies are dominated by chlorite, hornblende and …
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The effect of preexisting joints on normal fault evolution : insights from fieldwork and analogue modeling
… reservoirs worldwide are bound to brittle lithologies that are affected by interacting fracture networks. For a better prediction of reservoir qualities a basic investigation of such interactions is inevitable. In this context, the present work aims for an understanding of the effect of …
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Depositional environments, ichnology and diagenesis of the upper Frobisher-Alida beds of the Elkhorn Ranch and Roughrider fields of western North Dakota
… evaporites. Sublittoral rocks dominate the basal lithologies throughout the study area. Depositional environments illustrate a regressive sequence: normal marine wackestones and packstones; marginally restricted wackestones; restricted wackestones and mudstones; littoral to sublittoral shoal …
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Lithology and alteration assemblages of the Boss iron-copper deposit, Iron and Dent Counties, Southeast Missouri
… appreciable copper sulfide mineralization. Major lithologies of Boss West Dome were characterized by petrologic, petrographic and geochemical methods. Previous lithologic classifications inaccurately characterized numerous rock units. Alteration assemblages at West Dome were also characterized and …
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