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.
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Showing 1 to 20 of 65 for “"Placer"”.
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Phoenix : an interactive hierarchical topological floorplanning placer
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and, (B.S.)--Massachusetts Institute of Technology, Dept. of Physics; and, (B.S.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1985.
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Pre-1900s Chinese placer mining in northeastern Washington State: an archaeological investigation
… documentation regarding the pre-1900s Chinese placer miners in northeastern Washington has left the historical and archaeological records fragmented. Documentation of the Chinese placer mining activities in the region is poor, at best, and the scars left on the landscape by these miners are …
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Gold-enriched rims on placer gold grains: an evaluation of formational processes
Placer gold is frequently reported to assay at overall higher values of fineness than the gold in the rock from which it was liberated. A related phenomenon is the historical discovery of many extremely large gold nuggets (up to 28 lbs) in the southeastern United States that have no apparent source …
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Application of remote sensing to diamond placer exploration in a tropical jungle environment, Caroni River, Venezuela
Includes bibliographical references (pages 144-167).
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THE EFFECTIVENESS OF TROUT HABITAT RESTORATION IN EUSTACHE CREEK, A FORMERLY PLACER-MINED STREAM IN WESTERN MONTANA
… Restoration in Eustache Creek, a Formerly Placer-Mined Stream in Western Montana Committee Chair: Dr. Daniel Spencer Aquatic ecosystems in the western U.S. have been severely degraded over the last century by anthropogenic activities such as mining, logging and grazing. Habitat …
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THE EFFECTIVENESS OF TROUT HABITAT RESTORATION IN EUSTACHE CREEK, A FORMERLY PLACER-MINED STREAM IN WESTERN MONTANA
… Restoration in Eustache Creek, a Formerly Placer-Mined Stream in Western Montana Committee Chair: Dr. Daniel Spencer Aquatic ecosystems in the western U.S. have been severely degraded over the last century by anthropogenic activities such as mining, logging and grazing. Habitat …
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THORIUM SPECIATION IN SYNTHETIC ANHYDRITE, PLACER ILMENITE CONCENTRATE, AND TITANIA SLAG: IMPLICATIONS FOR THORIUM GEOCHEMICAL BEHAVIOR, SEQUESTRATION, AND BENEFICIATION
Understanding thorium speciation and distribution in ore minerals and related materials is of critical importance so that the thorium fuel cycle can be sourced as byproducts from metallurgical processes. The objective of this dissertation is to study thorium-bearing species in selected ore minerals …
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Modern VLSI Placement Observing Technology Constraints
… a high-performance modern technology-driven placer called Eh?Placer is presented to address the challenges rising in modern technology processes. Eh?Placer is a comprehensive placement framework that provides solutions while observing modern technology constraints and routability, and …
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ECONOMIC GEOLOGY OF THE SAN BERNARDINO MOUNTAINS, CALIFORNIA
… skarn gold deposits. New work indicates that the placer gold from Holcomb Valley is often of very high purity. Placer gold samples were analyzed using the scanning electron microscope and energy dispersive x-ray spectra to determine the purity of the gold. Rim and core analysis of the placer gold …
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Application of the 190Pt-186Os isotope decay system to dating platinum-group minerals
… age of platinum-group minerals (PGM) in placer deposits has traditionally been very challenging. The 190Pt-186Os decay system, measured by laser ablation multi-collector ICPMS (LA-MC-ICPMS), has been demonstrated as a useful geochronometric tool for detrital PGM grains. However, it is …
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Entre la agencia y la reproducción. Una narrativa encarnada de la sexualidad a través de la autoetnografia
… hablamos, con qué referentes construimos el placer y cómo esos posicionamientos afectan nuestra práctica. Al mismo tiempo, como profesionales, debemos ser capaces de habilitar espacios seguros donde sea posible hablar del cuerpo, el placer y las emociones sin juicio ni tabú. No se trata solo …
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Late Proterozoic bedrock geology and its influence on neogene littoral marine diamondiferous trapsites, MA1-Sperrgebiet, Namibia
… hosts one of the world's largest diamond placer deposits. Diamond distribution in this placer deposit is directly related to the presence of a diamond-carrying gravel, the degree of reworking of the gravel and the quantity and quality of the diamond trapsites. The diamond-carrying gravel …
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Lode gold deposit characterization using evidence from stream sediments: an example from Brush Creek, Montgomery County, Virginia
Placer ore minerals are commonly intergrown with "relict" phases that coexisted with the ore mineral in the original lode deposit. Studying these relict phases can yield important information about the nature, and formation of the lode deposit. This type of study can be useful in areas with poor …
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Surface textures and other features of diamonds
… than 11 000 diamonds, from thirty kimberlite and placer deposit localities, are reported. Forty-one pristine surface textures are distinguished, including twelve which are described for the first time. Only two surface textures are ascribed to crystal growth. The others are considered to result …
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Termopotamia : colonia de agregación variable
… por prisioneros voluntarios, reclusos del placer.
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