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SUMMARY:WMMI Speakers’ Bureau Lecture with Daniel Kile
DESCRIPTION:Introduction to Ore Microscopy\nEver since ore minerals have been mined\, there has been a need to identify them and discern their chemistry and associations. This information is essential to the mining industry to assess the value of the ore\, and to determine the most efficient means of concentrating the mineral of economic interest. This lecture will highlight some of the important observations and corresponding properties that can be evaluated with an ore microscope\, and give an overview of the basic equipment required to do so.\nThe reflected light/ore microscope used for ore microscopy was developed in the 1920s. In contrast to a transmitted light microscope that is used to examine rock thin sections\, an ore microscope utilizes vertically incident light to examine the metallic\, opaque minerals that are of economic importance. Optical properties of reflectance\, bireflectance\, and anisotropism\, as well as physical properties of cleavage\, twinning\, internal reflections\, and hardness\, as can be observed in an ore microscope\, will be summarized in this lecture\, in addition to a discussion and demonstration of some of the required equipment.\nDespite the advent of X-ray diffraction and microbeam techniques to determine quantitative chemistry\, the utility of the ore microscope has not been rendered obsolete. Interpretation of replacement and weathering processes\, textures\, and intergrowths can significantly affect the outcome of ore beneficiation – and only visual observation with polarized–reflected light can provide that information.\nThis will be a one-to-two hour lecture\, and will assume a basic knowledge of mineralogy. \nLecture Outline:\nThe ore microscope: Construction\, light path\nReflected light: Incident/bright field vs. oblique/dark field illumination\nPolarized light: Plane and crossed polars\nOre mounts & ore leveling press\nBasic Properties: Color\, reflectance\, hardness\nOptical Properties: Observations in plane polarized light (bireflectance\, cleavage); observations in partly crossed polarized light (anisotropism\, twinning\, internal reflections)\nGeneral Observations: Weathering/alteration\, replacement\, exsolution\, deformation\nMineral groups: Native elements\, sulfides\, sulfosalts\, oxides\, arsenides\nResources for ore mineral identification:  Texts\, charts    \nAuthor Biography\nDaniel Kile was formerly a Research Geochemist with the U.S. Geological Survey\, and currently is Scientist Emeritus with that organization\, as well as Adjunct Faculty at the Hooke College of Applied Sciences (Westmont\, Illinois)\, where he teaches Optical Crystallography. He has taught Ore Microscopy at both the Colorado School of Mines and at the Hooke College of Applied Sciences\, and was previously Adjunct Faculty at the Colorado School of Mines where he taught a semester class in Optical Mineralogy. He has written nearly 150 articles and abstracts in the fields of mineralogy and environmental sciences\, published in professional journals and magazines\, and has been a guest lecturer at numerous earth sciences organizations over the past 40 years.  \nOnly $5 per person! Free to Museum Members.\nPlease RSVP to 719-488-0880 or email rsvp@wmmi.org
URL:https://secure.northernminer.com/event/wmmi-speakers-bureau-lecture-with-daniel-kile/
LOCATION:Western Museum of Mining & Industry\, Colorado Springs\, CO\, 80921\, United States
CATEGORIES:Course,Information session,Presentation,Short Courses
ATTACH;FMTTYPE=image/jpeg:https://secure.northernminer.com/wp-content/uploads/2018/05/Leitz-MOP-reflected-light-ore-microscope-manufactured-in-1927.jpg
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