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Nier, Alfred

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Series: Reviews in Economic Geology
Published: 01 January 1985
DOI: 10.5382/Rev.02.06
EISBN: 9781629490090
... and 1940's leading to our present understanding include the discovery of deuterium and formulation of the theoretical basis for stable-isotope fractionation by Harold C. Urey and colleagues at the University of Chicago and the development of improved mass spectrometers by Alfred O. Nier at the University...
Image
( A ) Aston's third mass spectrograph, used for Pb isotope analysis ( court...
in > Elements
Published: 01 February 2013
F igure 2 ( A ) Aston's third mass spectrograph, used for Pb isotope analysis ( courtesy of C ambridge P hysics O utreach ); ( B ) Alfred Nier with the flight tube of his 180° mass spectrometer, used to measure the isotopic composition of uranium (U niversity of M innesota , courtesy
Image
( A ) Aston's third mass spectrograph, used for Pb isotope analysis ( court...
in > Elements
Published: 01 February 2013
F igure 2 ( A ) Aston's third mass spectrograph, used for Pb isotope analysis ( courtesy of C ambridge P hysics O utreach ); ( B ) Alfred Nier with the flight tube of his 180° mass spectrometer, used to measure the isotopic composition of uranium (U niversity of M innesota , courtesy
Image
( A ) Aston's third mass spectrograph, used for Pb isotope analysis ( court...
in > Elements
Published: 01 February 2013
F igure 2 ( A ) Aston's third mass spectrograph, used for Pb isotope analysis ( courtesy of C ambridge P hysics O utreach ); ( B ) Alfred Nier with the flight tube of his 180° mass spectrometer, used to measure the isotopic composition of uranium (U niversity of M innesota , courtesy
Journal Article
Journal: Elements
Published: 01 February 2013
Elements (2013) 9 (1): 53-57.
...F igure 2 ( A ) Aston's third mass spectrograph, used for Pb isotope analysis ( courtesy of C ambridge P hysics O utreach ); ( B ) Alfred Nier with the flight tube of his 180° mass spectrometer, used to measure the isotopic composition of uranium (U niversity of M innesota , courtesy...
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Series: Geological Society, London, Special Publications
Published: 01 January 2006
DOI: 10.1144/GSL.SP.2006.256.01.18
EISBN: 9781862395046
... the isotopic (or ‘physical’) method of age determinations was provided by Alfred Nier (Fig. 1 ), a physicist from the University of Minnesota, who, in 1938, demonstrated that the isotope abundances of Pb samples varied depending on the age and chemical composition of the ores - 206 Pb and 207 Pb being...
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Journal Article
Published: 01 June 2002
The Canadian Mineralogist (2002) 40 (3): 993-994.
..., in conclusion, the importance that letters have in the compilation of this fascinating biography. Letters between Holmes and the major figures of the day in geology: T.C. Chamberlin, R.A. Daly, Alfred Nier, and many others, all added a remarkable scientific and personal richness to the narrative that goes far...
Journal Article
Published: 01 January 2001
Reviews in Mineralogy and Geochemistry (2001) 43 (1): iv-v.
... between calcite and water might provide a means to estimate the temperatures of geologic events. Building on wartime Advances in electronics, Alfred Nier then designed and built the dual-inlet, gas source mass-spectrometer capable of making measurements of sufficient precision and accuracy. The basic...
Series: Geological Society, London, Special Publications
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.190.01.10
EISBN: 9781862394384
..., but 40 K was still to be discovered by Alfred Nier some three years later ( Harper 1973 ). Nevertheless, the principles of Holmes’ new key to petrogenesis are precisely those in use today, but it was another thirty years before initial ratios were ‘discovered’ with the recognition that the ideas...
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Series: Geological Society, London, Special Publications
Published: 01 January 2002
DOI: 10.1144/GSL.SP.2002.192.01.08
EISBN: 9781862394407
..., 1936, Alfred Nier commenced work at Harvard University, and a new era in radiometric dating began. Although a physicist by background, Nier was interested in the problems of measuring geological time, and in the late 1930s he dated a suite of 25 rocks and published the results in a series...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.190.01.11
EISBN: 9781862394384
... isotopes by Frederick Aston ( Harper 1973 ). By the start of the Second World War, America had become the undisputed leader in the field of geochronology, as Alfred Nier’s mass spectrometry instrumentation and skill dramatically improved radiometric dating, and the Earth’s age rapidly increased from 1.6...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2006
DOI: 10.1144/GSL.SP.2006.256.01.21
EISBN: 9781862395046
... then no longer exceeded 4600 Ma (Singer 1954 , 1957 ). A method based on quantitative measurements of the abundances of the isotopes of lead was developed by the American physicist Alfred Otto Carl Nier (1911–1994) in the late 1930s. He found that the stable isotopes of lead (204, 206, 207, 208) do not occur...
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Journal Article
Published: 02 January 2014
Canadian Journal of Earth Sciences (2014) 51 (3): 197-207.
... instructors at Cambridge was Harold Jeffreys, the celebrated mathematician, geophysicist, and astronomer, who vigorously denied the physical possibility of continental drift throughout his long career. Like Alfred Wegener in Berlin, Tuzo learned in Cambridge that his math skills would not allow him to excel...
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Journal Article
Published: 02 January 2003
Reviews in Mineralogy and Geochemistry (2003) 53 (1): 183-213.
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Series: Geological Society, London, Special Publications
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.190.01.12
EISBN: 9781862394384
... time, implying an age of only 1200 Ma for the simplest plausible model with the expansion slowed by gravity. More sophisticated techniques in geochronology, combined with new determinations of lead isotopic abundances ( Nier 1938 , 1939 ), made 3350 Ma a firm lower limit for the age of the Earth...
Journal Article
Published: 01 September 2002
Geological Magazine (2002) 139 (5): 525-539.
... measurements on Rb were performed using a non-commercial Nier-type mass spectrometer built at the Geological Survey of Finland. Repeated analyses of La Jolla Nd standard gave 143 Nd/ 144 Nd of 0.511849 ± 0.000011 (mean and external 2σ error of eleven measurements); external error in the reported 143 Nd– 144...
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Series: Geological Society, London, Special Publications
Published: 01 January 2006
DOI: 10.1144/GSL.SP.2006.256.01.12
EISBN: 9781862395046
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Series: GSA Special Papers
Published: 03 October 2017
DOI: 10.1130/2017.2523(03)
EISBN: 9780813795232
... of Barrell 40 yr earlier and contrary to the growing body of evidence that many classes of meteorites formed ca. 4.5 Ga. Although a step forward from earlier estimates (e.g., 2.2 Ga; Nier et al., 1941 ; Holmes, 1946 ), it was still shy of the 4.56 Ga age proposed on the basis of numerous concurrent Pb...
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