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microbeam analysis

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Series: Geological Society, London, Special Publications
Published: 01 January 2014
DOI: 10.1144/SP398.5
EISBN: 9781862396746
... Abstract The smallest tephra grains present special challenges in their preparation for quantitative microbeam chemical analysis by EPMA and LA-ICP-MS. High-quality polished surfaces are an essential pre-requisite for the collection of high quality quantitative chemical data, as these shards...
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Series: European Mineralogical Union Notes in Mineralogy
Published: 01 January 2010
DOI: 10.1180/EMU-notes.9.7
EISBN: 9780903056359
... concentration. These curves require a large number of well characterized standards with compositions that bracket the unknowns. In wet chemical analysis, such as atomic absorption spectroscopy (AAS), it is relatively easy to make solutions with the appropriate concentrations. In contrast, production...
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Journal Article
Published: 01 November 2003
American Mineralogist (2003) 88 (11-12): 1955-1969.
... was carried out across the accessible portions of the deposit to obtain as complete a representation of the distribution of amphibole types as possible. The range of amphibole compositions, determined from electron probe microanalysis and X-ray diffraction analysis, indicates the presence of winchite...
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Journal Article
Published: 01 October 2009
American Mineralogist (2009) 94 (10): 1325-1332.
... limit of the present EMP analysis (<1 wt%). The microbeam analyses revealed that the PAH, SPAH, and NPAH molecules are incorporated into the crystal structure of the Skaggs Springs idrialite and imply that arrangement of those molecules in the crystal structure is schematically represented...
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Series: Geological Society, London, Special Publications
Published: 01 January 2014
DOI: 10.1144/SP398.1
EISBN: 9781862396746
... , showing the range of sizes of material which need to be prepared for microbeam analysis. Because of the small amounts of material in marine cryptotephra deposits, routine bulk analysis (e.g. X-ray fluorescence (XRF) and solution inductively coupled plasma (ICP) methods, see Pearce et al. 2004 ) would...
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Journal Article
Published: 01 January 2013
American Mineralogist (2013) 98 (1): 110-119.
... Source (APS), Argonne National Laboratory. The APS was operating in a 100 mA top-up mode (twenty 5 mA bunches, filled every 2 min). A cryogenic-cooled Si(111) double crystal monochromator (DCM) and Kirkpatrick-Baez (KB) mirrors were used to provide a monochromatic microbeam of ~7 μm (vertical) × ~5 μm...
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Journal Article
Published: 01 December 1998
European Journal of Mineralogy (1998) 10 (6): 1097-1108.
...Thomas J. Shepherd; Carlos Ayora; Dioni I. Cendon; Simon R. Chenery; Alain Moissette Abstract An interlaboratory study was carried out to assess the complementariness of laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) and cryogenic SEM-energy dispersive analysis (cryo-SEM...
Journal Article
Published: 01 April 1995
The Canadian Mineralogist (1995) 33 (2): 313-322.
Journal Article
Published: 01 April 1998
The Canadian Mineralogist (1998) 36 (2): 511-524.
... was controlled during analysis with a programmable heating stage. Analysis of the XAFS data shows that ZnCl 4 (super 2-) is the dominant aqueous zinc species in the fluid inclusions up to the average trapping temperature (430 degrees C). Furthermore, the mean Zn-Cl bond length decreases uniformly from 2.31...
Journal Article
Published: 01 April 2005
American Mineralogist (2005) 90 (4): 749-754.
...Mickey E. Gunter; Eron Singleton; Bryan R. Bandli; Heather A. Lowers; Gregory P. Meeker Abstract Major-, minor-, and trace-element compositions, as determined by X-ray fluorescence (XRF) analysis, were obtained on 34 samples of vermiculite to ascertain whether chemical differences exist...
FIGURES
Journal Article
Published: 01 June 1998
Clays and Clay Minerals (1998) 46 (3): 301-316.
...Chi Ma; John D. FitzGerald; Richard A. Eggleton; David J. Llewellyn Abstract Diffusion of alkali and low-atomic-number elements during the microbeam analysis of some silicates by analytical electron microscopy (AEM) has been known for some time. Our repeated analyses at 300 kV of kaolinite...
Journal Article
Published: 01 August 2016
Mineralogical Magazine (2016) 80 (5): 739-748.
... of the chain of reactions that ultimately release As into groundwater (see Foley and Ayuso, 2008 ). Primary arsenopyrite and three secondary arsenates (arseniosiderite, pharmacosiderite and scorodite) were recorded during this study. The SEM-EDS analysis was carried out using a Hitachi SEM model S-4700...
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Journal Article
Published: 01 February 2007
American Mineralogist (2007) 92 (2-3): 233-234.
... techniques, particularly in the near infrared, to the study of CL images of minerals and rocks. The last decade has seen numerous advances in the application of microbeam-induced CL in the field of mineralogy, primarily related to improvements in instrumentation, software, and the ease of collection...
Journal Article
Published: 01 January 2019
American Mineralogist (2019) 104 (1): 17-30.
...Timothy Chapman; Geoffrey L. Clarke; Sandra Piazolo; Nathan R. Daczko Abstract A novel method utilizing crystallographic orientation and mineral chemistry data, based on large-scale electron backscatter diffraction (EBSD) and microbeam analysis, quantifies the proportion of relict igneous...
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Journal Article
Journal: Economic Geology
Published: 01 September 2016
Economic Geology (2016) 111 (6): 1509-1517.
... ). The main analytical technique employed in this study is microbeam scanning X-ray fluorescence analysis on roughly polished rock slabs, accomplished with the Bruker Tornado™ desktop equipped with a rhodium target X-ray tube operating at 50 kV and 500 nA without filters and an XFlash ® silicon drift X-ray...
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Journal Article
Published: 01 December 2017
South African Journal of Geology (2017) 120 (4): 525-540.
... ablation system. Single spot analyses had 20 µm diameter and crater depth 10 to 15 µm. The methods employed for analysis and data processing are similar to those described by Frei and Gerdes (2009) and common lead corrections were made where required. Full analytical details and quality control results...
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Journal Article
Published: 01 February 1996
American Mineralogist (1996) 81 (1-2): 158-168.
... showed no such loss of silica to the host. Thus, given appropriate cooling conditions, even very old (Precambrian?) silicic melt inclusions may be suitable for microbeam analysis after any necessary revitrification in the laboratory. Copyright © 1996 by the Mineralogical Society of America 1996 ...
Journal Article
Published: 01 October 2017
Mineralogical Magazine (2017) 81 (5): 1261-1277.
... of feldspathoid syenites from Cinder Lake, Manitoba, Canada. These phases are abundant throughout the host syenite and occur in grain sizes amenable to in situ microbeam analysis, providing a unique opportunity to study variations in their structural and spectroscopic characteristics over a wide range...
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Journal Article
Journal: Geology
Published: 02 May 2019
Geology (2019) 47 (7): 641-644.
... heterogeneities in Au, As, and Cu present as solid solution in pyrite suggest that interpretation of spikes on microbeam-derived depth-concentration profiles as metallic particles should be treated with caution. Here, we utilized nanoscale secondary ion mass spectrometry (NanoSIMS) and atom probe tomography...
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Series: European Mineralogical Union Notes in Mineralogy 14
Published: 01 January 2013
DOI: 10.1180/EMU-notes.14.7
EISBN: 9780903056380
...-igneous rocks. During deformation events, defects preserved in sheet structures indicate how micas deform on the atomic scale. Analysis by TEM elucidates the deformation mechanisms. Stacking faults within micas can record responses to external compression and extensional forces, or growth process...
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