Point counter based on Leitz mechanical stage

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Journal Article
Published: 01 February 1955
American Mineralogist (1955) 40 (1-2): 126–127.
...F. Chayes Abstract A point counter based on the stock model of the Leitz mechanical stage, which can be fitted to any Leitz petrographic microscope without retapping the table, may be of interest to many readers of this journal. The instrument was designed and built by the Baltimore Instrument...
Journal Article
Journal: Interpretation
Published: 20 December 2019
Interpretation (2020) 8 (1): T103–T114.
... using an FEI-manufactured QEMSCAN 650F instrument — the optimal resolution of which is 1.2 nm, and its magnification ranges from 30 × to 300,000 × . The instrument can obtain the elemental composition at each test point based on an X-ray energy spectrometer. Mineral phases...
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Journal Article
Published: 15 June 2015
The Canadian Mineralogist (2014) 52 (6): 969–980.
... composition (wt.%) of: S 30.77, Cu 33.61, Ga 13.31, In 9.48, Zn 5.74, Fe 6.13; the average ( n = 6) chemical composition of the synthetic phase is: S 30.73, Cu 28.05, Ga 15.99, In 11.86, Zn 7.37, Fe 6.13. The empirical formulae of ishiharaite and the synthetic analogue, based on 2 apfu , are: (Cu 0.55 Ga 0.19...
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Journal Article
Journal: PALAIOS
Published: 01 September 2015
PALAIOS (2015) 30 (9): 692–706.
... al. 1976 ). The main argument is that Halysis , with only a few tubes, does not represent mechanical fragments of larger chains (as interpreted by Frisch et al. 2013 ) but resemble more juvenile stages of growth. Indeed, irregular discontinuities representing rupture lines produced by mechanical...
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Journal Article
Published: 23 September 2020
Journal of the Geological Society (2021) 178 (1): jgs2020-022.
... −1 immediately following peak P–T conditions and accelerated cooling rates of 40–50°C myr −1 during the end stages of orogenesis in the Naver thrust sheet based on integrated monazite–xenotime geochronology–thermometry and limited age control of the overlying Emsian deposits above the eastern...
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Journal Article
Journal: Economic Geology
Published: 28 May 2021
Economic Geology (2021)
... element concentrations, and δ 34 S signatures of pyrite and arsenopyrite reflect contrasting mechanisms of Au precipitation and an evolution of physicochemical parameters of the ore-forming processes, particularly f O 2 and the intensity of fluid-rock interaction. Pyrite from stage 3 appears homogeneous...
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Journal Article
Published: 01 April 2012
The Canadian Mineralogist (2012) 50 (2): 353–370.
... and bismuth. It is especially illustrative of a “copper metasomatism” stage (CM) that affected the mineralization at Băiţa Bihor in its final phase of evolution ( Ilinca 2010 ), and during which Bi sulfosalts were particularily sensitive to transformations resulting in copper enrichment. On the one hand, CM...
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Journal Article
Published: 18 January 2017
Journal of the Geological Society (2017) 174 (3): 434–452.
... were made on each thin section using a Frantz mechanical stage counter attached to the microscope. The Gazzi–Dickinson method of grain counts ( Dickinson 1970 ; Ingersoll et al. 1984 ) was employed, which tends to underestimate the lithic component but enhance provenance interpretations for samples...
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Journal Article
Published: 01 June 1982
Bulletin of Canadian Petroleum Geology (1982) 30 (2): 112–139.
..., (Stach et a l . , 1975, p. 42). Composition was deter- mined by maceral-analysis by means of a Swift automatic point-counter and mechanical stage. Each composition is based on 300 points Vitrinite was counted either as vitfinite A (homogeneous vitrinite particles) or as vitfinite B (vitfinite intimately...
Journal Article
Published: 01 June 2002
Bulletin of Canadian Petroleum Geology (2002) 50 (2): 217–243.
... and potassium ferricyanide ( Dickson, 1966 ) in order to distinguish dolomite, nonferroan calcite, and ferroan calcite. Microfossil population counts were generated on a Swift Automatic Point Counter F 415C set at a stage interval of 0.33 mm; the counter was connected to a Leitz Laborlux binocular microscope...
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Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2010
DOI: 10.1144/SP335.21
EISBN: 9781862395831
... and the overlying Moine metasedimentary rocks. Subsequent university-based quartz petrofabric work, primarily focused on the Moines, would ultimately lead to the ‘Moine Petrofabric Controversy’ that ran from the late 1940s to the early 1960s. The later stages of this controversy overlapped, from the early 1950s–mid...
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Series: AAPG Studies in Geology, AAPG Studies in Geology
Published: 01 January 2002
DOI: 10.1306/St48794C10
EISBN: 9781629810591
... that affect the interpretation of radiometric surveys as well as most other geochemically based surveys. A method is discussed that compensates for variations in soil types, vegetation, and drainage, to improve the application of radiometric surveys. A mechanism is proposed, on the basis of these case...
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Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2014
DOI: 10.1144/SP386.19
EISBN: 9781862396630
... counts in one case, with the majority of grains being opaque. The line counting method ( Mange & Maurer 1992 ) was used on a Leitz polarizing microscope with 10× oculars, up to 50× objectives and a mechanical point-counter. Muscovite and biotite were excluded in the heavy mineral counts, although...
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