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Halley, Edmond

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Journal Article
Journal: Elements
Published: 01 April 2018
Elements (2018) 14 (2): 83-86.
... not atmospheric phenomena as had apparently been believed for thousands of years. In 1687, Isaac Newton applied his new theory of gravitation to the orbits of comets, showing that they moved in highly elliptical orbits, and his colleague Edmond Halley (1656–1742) proposed the periodic nature of comet 1P/1682 Q1...
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Series: Geological Society, London, Special Publications
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.190.01.01
EISBN: 9781862394384
... ). Despite the enforcement of religious orthodoxy by the state ( Davies 1969 , p. 11), freedom of expression about the origins and history of the Earth developed rapidly in the eighteenth century. In 1694, for example, Edmond Halley considered the implications of a comet impact on the Earth. He imagined...
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Series: Geological Society, London, Special Publications
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.190.01.09
EISBN: 9781862394384
... results ( Joly 1915 ). At that time Joly was unaware, as were his contemporaries, of the pioneering work of the English astronomer Edmond Halley ( Cook 1998 ). In 1715 Halley had proposed to the Royal Society that salt concentrations in lakes that had no discharge rivers, should be measured every 100...
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Series: Geological Society, London, Special Publications
Published: 01 January 2002
DOI: 10.1144/GSL.SP.2002.192.01.12
EISBN: 9781862394407
... to explain the slow variation of declination and had placed it in the context of numerous research agendas. Edmond Halley famously sought to explain secular variation by hypothesizing the existence of a magnetic shell surrounding a magnetic ‘nucleus’ inside the Earth, the two revolving at slightly different...
Series: Geological Society, London, Special Publications
Published: 01 January 2004
DOI: 10.1144/GSL.SP.2004.225.01.02
EISBN: 9781862394735
... ). The concept of the hydrological cycle was further developed by the British astronomer Edmond Halley (1656–1742) who showed that water evaporated from the oceans and returned as rainfall ( Halley 1687 ). Halley was the first British investigator to use quantitative results in a hydrological context. Just over...
Journal Article
Published: 22 July 2015
Seismological Research Letters (2015) 86 (5): 1432-1437.
... – 383 . Cook A. ( 1998 ). Edmond Halley: Charting the Heavens and the Seas , Clarendon Press , Oxford, United Kingdom . Davison C. ( 1927 ). The Founders of Seismology , Cambridge University Press , London, United Kingdom . Descartes R. ( 1644 ). Principia...
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Journal Article
Published: 01 September 2000
Journal of Sedimentary Research (2000) 70 (5): 977-984.
... et al. 1983 ; Ward and Halley 1985 ; Humphrey 1988 ), whereas some early studies invoked an evaporative origin (e.g., Supko 1977 ). In the middle to late 1980s it became clear that only very minor amounts of dolomite can be formed in typical coastal mixing zones and that such dolomites have fairly...
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Journal Article
Journal: Economic Geology
Published: 01 August 2001
Economic Geology (2001) 96 (5): 913-938.
... that contain a high gold/base metal ratio and are composed principally of disseminated mineralization rather than massive sulfide lenses. The Henty deposit ( Halley and Roberts, 1997 ; Callaghan, 2001 ), a current producing mine (1.7 Mt at 11 g/t Au), is the best known example, but others include South...
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Series: SEPM Special Publication
Published: 01 January 2010
DOI: 10.2110/sepmsp.094.129
EISBN: 9781565762985
... al., 1992 ). Marine 87 Sr/ 86 Sr is insensitive to freshwater dilution because the concentration of Sr in rivers ( Palmer and Edmond, 1989 ) is rarely more than one tenth, and often less than one hundredth, of the concentration of Sr in seawater (7.6 g g -1 of Sr at 35 PSU). Modelling riverine...
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Series: Geological Society, London, Special Publications
Published: 01 January 2007
DOI: 10.1144/SP287.29
EISBN: 9781862395350
... their experience compared with that of geological travellers. Their extensive expeditions in the early twentieth century were not the first aimed primarily at understanding Earth's magnetism. Edmond Halley (1656–1742) had undertaken two expeditions into the Atlantic Ocean to chart declination, winds, and ocean...
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Journal Article
Published: 01 December 2016
Bulletin de la Société Géologique de France (2016) 187 (6): 245-260.
... is given after Millot et al. [2004] , river flux after Edmond et al . [1979] and continental surface abundance after Teng et al . [2004] . The residence time of a dissolved element in a geochemical reservoir like the global ocean makes sense only if it is compared to the residence time...
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Series: Geological Society, London, Special Publications
Published: 01 January 2002
DOI: 10.1144/GSL.SP.2002.192.01.04
EISBN: 9781862394407
... topographic contour map was J. Dupain-Triel's (1722–1805) map of France (Dupain-Triel 1798–1799). Edmond Halley's (1656–1742) chart of magnetic declination for the North Atlantic (Halley 1701) was the earliest map to show isolines of an observed non-topographic phenomenon, but with the failure of magnetic...
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Series: Reviews in Economic Geology
Published: 01 January 2016
DOI: 10.5382/Rev.18.09
EISBN: 9781629490922
... prove useful for identifying subtleties in alteration mineral associations (e.g., V-rich mica vs. others) as was done successfully for an orogenic Au deposit by Halley and Walshe (2006; see Robert et al., 2007 , their fig. 13, p. 707). Alkalic gold deposits are characterized by potassic and phyllic...
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Journal Article
Published: 01 March 2007
South African Journal of Geology (2007) 110 (1): 1-46.
... diameter, on Callisto, and the numerous volcanic structures on Io. Source: NASA, Galileo space mission. The second half of the 17th century is clearly dominated by the advances made by Isaac Newton (1643 to 1727) and Edmond Halley (1656 to 1742). Besides the full concept of celestial mechanics...
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Journal Article
Published: 01 January 2003
Reviews in Mineralogy and Geochemistry (2003) 52 (1): 363-405.
... limited number of surface seawater 231 Pa/ 235 U seawater measurements (see Edmonds et al. 1998 and references therein). Thus, existing data suggests that surface corals initially have 231 Pa/ 235 U ratios that are similar to or lower than seawater values. Taken together, this data indicates...
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Journal Article
Journal: Economic Geology
Published: 01 May 2005
Economic Geology (2005) 100 (3): 547-566.
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