By David H. Krinsley, Kenneth Pye, Sam Boggs Jr, N. Keith Tovey

ISBN-10: 0521019745

ISBN-13: 9780521019743

Backscattered scanning electron microscopy (BSE) finds the minerals, textures, and materials of sediments and rocks in a lot larger element than is feasible with traditional optical microscopy. Backscattered Scanning Electron Microscopy offers a concise precis of the BSE procedure. This complete consultant makes use of ample photos to demonstrate the kind of info BSE yields and the appliance of the strategy to the research of sediments and sedimentary rocks. The authors evaluation using this petrographic method on the entire significant sedimentary rock forms, together with sediment grains, sandstones, shales, carbonate rocks, rock varnish, and glauconite. additionally they describe photo research options that let quantification of backscattered scanning electron microscope pictures. seriously illustrated and lucidly written, this booklet will offer researchers and graduate scholars with the most up-tp-date study in this very important geological instrument.

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Extra info for Backscattered Scanning Electron Microscopy and Image Analysis of Sediments and Sedimentary Rocks

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The morphology of the cement crystals is dependent upon a number of factors, including the available space for crustal growth and the chemistry of the ambient pore fluids. In these EARLY DIAGENETIC PHENOMENA concretions, siderite occurs in a number of different forms including aggregates of intergrown rhombic crystals, botryoidal and mamillary aggregates of radial-fibrous crystals, and irregular clusters of acicular crystals. Mg-calcite occurs mainly as equant, blocky crystals. 22. 19. K. Scale bar = 100/im.

However, they are somewhat fragile and subject to breakage unless care is taken to ensure adequate clearance between a sample and the detector. Low-Voltage Backscattered Electron Detectors A number of detectors have been developed specifically to assist image acquisition from sensitive and uncoated samples (mainly biological specimens and nonconducting materials) at low-kV and small probe currents. An example is the microchannel plate detector, which gives reasonable-resolution BSE and SE images in the 1-5 keV range (Joy and Joy, 1993).

Goethite-jarosite (G-J) subglacial precipitate (white) developed on schist bedrock, from Mitdalsbreen, Norway. Many of the grains included within the precipitate are silt- to sand-size quartz and feldspars, suggesting that a significant proportion of the grains has been derived from an allochthonous source. Scale bar = 100 51 Sandstones Although the petrographic microscope remains the basic tool for analysis of sandstones, petrographic microscopy is being increasingly supplemented by newer analytical methods.

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Backscattered Scanning Electron Microscopy and Image Analysis of Sediments and Sedimentary Rocks by David H. Krinsley, Kenneth Pye, Sam Boggs Jr, N. Keith Tovey

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