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Showing 1 to 20 of 108 for “"thin section"”.
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Vibration assisted filling of thin section castings
… of the mechanism of the vibration needed to fill thin section or one with sharp edges in profile shapes and clarifying the dominant control parameters of the vibration in thin wall investment casting is key to producing sound casting (one free of misrun defects). It's also a central issue for …
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Upscaling Lithology and Porosity Types from Microscopic to Core Domain with Thin Section Petrography, Dual Energy CT, and Rock Types: Creation of Diagenesis and Porosity Type Logs
… Types from the Microscope to the Core with Thin Section Petrography, Dual Energy CT, and Rock Types: Creation of Diagenesis and Porosity Type Logs Authors: Jacob M. Proctor, André W. Droxler, Naum Derzhi, Heath H. Hopson, Paul (Mitch) Harris, Pankaj Khanna, and Daniel J. Lehrmann ABSTRACT …
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A Nano-Scale Chemical and Structural Characterization of Chinook Salmon (Oncorhynchus tshawytscha) Otoliths Using a FIB and HRTEM
We used a focused ion beam (FIB) to create thin sections from the post-hatch and core regions of Chinook salmon (Oncorhynchus tshawytscha) otoliths. The nano-scale chemistry and structure of these regions was characterized in thin section using scanning electron microscopy (SEM) in conjunction with …
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PRODUCTION OF VIRUS-FREE ORCHIDS VIA TISSUE CULTURE TECHNIQUES
… the infected orchid plants: meristem culture and thin section culture with/without chemotherapy. Meristems (0.10 mm to 1.00 mm) were excised from axillary shoots of CyMV and ORSV infected Mokara Char Kuan 'Pink', a monopodial hybrid and CyMV-infected Cattleya Bowbells, a sympodial hybrid. Although …
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Integrating rotational components to optical properties observed in petrographic thin sections via automated image acquisition and analysis
The analysis of petrographic thin sections is a widely used process for the identification of the mineralogy of rocks and the analysis of their textural and microstructural characteristics. Despite the benefits of petrographic thin section analysis, it remains a time-consuming process with the …
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The Effects of Amphibole- and Sulfide-Producing Melts on Crustal Strength in Gabbros of Lower Oceanic Crust in Oceanic Core Complexes, Mid-Atlantic and Southwest Indian Ridges
… Ridge (SWIR). Dikelets are a texture found in thin section samples from these systems that form as a result of crystal-plastic deformation. Thin section samples from the Atlantis Massif, MARK Area, and 13˚-15˚ North of the MAR and the Atlantis Bank of the SWIR were observed with petrography to …
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Petrography of the Harvest Lake Area, Quebec, Canada
… were determined by hand-sample inspection, by thin-section observations, and by observing powdered samples immersed in refractive oils. </p>
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Permeability, Pore Body, and Pore Throat Size Distributions from 2D Image Analysis: Comparison with Results from 3D Imaging and Laboratory Measurements
… portions of the sample are identified in thin section, and models exist for estimating rock properties, then petrophysical properties may still be estimated. This was illustrated for absolute permeability by Hathon et al., (2003), and Tripathi, et al., (2017). That work required detailed …
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Pottery and emporia : imported pottery in Middle Saxon England with particular reference to Ipswich.
… types recovered at Ipswich. The macroscopic and thin-section analyses are described, and the problems of the various ceramic types, in particular the northern French Black wares and Tating ware, are discussed. The appendices give details of the thin-section analysis undertaken. In Part IV the …
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Petrology and contact relationships, SW portion PC Mullen Creek mafic complex, Medicine Bow Mts., Wy.
Geologic mapping and thin section petrography of rock units in and adjacent to the southwestern portion of the Mullen Creek mafic complex reveals the presence of a roof zone of a Precambrian layered basic intrusion that invaded a metavolcanic sequence (predominantly hornblende gneiss). This portion …
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Petrology of the Gradational Intrusive Contact Between the Packsaddle Schist and the Town Mountain Granite, Enchanted Rock State Natural Area, Llano Uplift, Central Texas
… Schist is a gradational contact exhumed within the Llano uplift. This contact is exposed along the southeastern margin of the Enchanted Rock batholith in central Texas. Field observations, hand sample and thin section petrography, and handheld X-ray fluorescence analysis of hand samples …
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Paleomagnetism conglomerate test on Archean conglomerate rock from Jack Hills, Australia
… time of its formation. Twenty-nine clasts from a thin section of the sample were thermally demagnetized up to a temperature of 395°C. The heating revealed two components of magnetization which were unblocked at low and mid temperatures, revealing a magnetic mineralogy of Pyrrhotite.Eight matrix …
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The Origins and Development of the Verwood-Type Pottery Industry
… in the Horton and East Worth areas using thin section petrography and chemical analysis via pXRF. This study shows future research in the area should seek to maximise archaeological site investigations in the Cranborne, Horton, Alderholt and Verwood parishes. Additionally, where …
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Effect of ply drop-offs on the strength of graphite-epoxy laminates
… dropped-plies is less than the strength of its thin section, and the compression specimens exhibited a lower strength than a tension specimen of the same configuration and width. For the laminates in this study, the reduction in strength is directly related to the axial stiffness change between …
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Refractometry by total reflection
… indices and orientation of biaxial minerals in thin section (Viola l 899a, l 899b, 1902; Comu 1901, 1902). RTR with the Abbe-Pulfrich refractometer yielded refractive indices to a precision of ±0.0002, or better. Later, Smith (1905a, 1905b) introduced a simpler refractometer, now known as the …
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Diagenesis And Controls On Porosity And Permeability In The Upper San Andres Formation Of West Texas
… influences on porosity and permeability within the San Andres Formation along the northern CBP. Two cores from the Monument 4-2 and Peterson 1 wells in West Texas were analyzed using core descriptions, thin section petrography, XRD, XRF, and MICP. Results indicate that dolomitization …
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Concretions and nodules in the Hell Creek Formation, southwestern North Dakota
… enclosing sediments were analyzed by thin section and by quantitative and qualitative x-ray diffraction methods. </p><p> Fourteen types of concretions and three types of nodules, classified according to shape and composition, have thus been defined. Concretionary types include …
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Petrology and geochemistry of the Killdeer carbonates
… the summer of 1972. Forty-three stratigraphic sections were measured and representative samples of each were collected for further analysis. Seven section were selected as representative of the area, and samples from these were studied in thin section with the petrographic microscope; the thin …
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HYDROTHERMAL FLUID TRANSPORT PATHWAYS ALONG FRACTURES AND VEINS AT BROTHERS VOLCANO, SOUTHERN KERMADEC ARC
… in the mineralization of economic metals within calderas. But there are several methods by which fractures can form. Regional extension, episodic caldera collapse, and fluid overpressure all have the potential to create brittle features. Current studies focus on the formation of fractures …
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Stratigraphy and petrography of the Wytheville formation in southwest Virginia
… lower and upper limits. In a number of sections south of Wytheville, Wythe County, Virginia, the nature of the lithofacies is fully exemplified. The Wytheville Formation, is composed mainly of rather fine-grained, very dark-gray dolomite, much of which is characterized by white calcite …
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