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equilibrium

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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP468.3
EISBN: 9781786203687
.... 2004 ; Eiler 2007 ). An example of a methane clumped isotopologue is 13 CH 3 D. Such isotopologues are of geological and geochemical interest because, for a population of molecules in isotopic equilibrium with one another, their abundance is controlled solely by the system’s average or ‘bulk...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP451.4
EISBN: 9781786203328
... is to place the watch or watches in a known volume of air and monitor (taking hourly samples) the increase in radon concentration as it rises towards equilibrium. The exponential rate constant and equilibrium radon activity can then be obtained from the resultant time-series of radon concentrations, and, from...
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Journal Article
Journal: Lithosphere
Published: 18 May 2017
Lithosphere (2017) 10 (1): 79-94.
... al., 2001 ). We infer that ∼5%–15% partial melting of a depleted MORB mantle source could have produced residual peridotites with HREE contents similar to those of the Kalaymyo peridotites ( Fig. 6A ). We have calculated the equilibrium temperatures of the Kalaymyo peridotites using the two...
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Series: Geological Society, London, Special Publications
Published: 01 January 2015
DOI: 10.1144/SP422.10
EISBN: 9781862397460
... the host rock of the heat transfer process. The overall timescales of the xenoliths immersed in the magma are short enough to preserve melt (glass)-bearing microstructures, yet long enough to reach approximate mineral equilibrium assemblages and, hence, an assumed steady-state condition. We studied...
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Series: GSA Special Papers
Published: 01 August 2011
DOI: 10.1130/2011.2480(01)
Published: 01 January 2009
DOI: 10.1130/2009.monitoring(06)
EISBN: 9780813759432
... Scientist Yes $$ Group High Aerial/satellite image Scientist Yes $$$ Individual Low Note: ELA—equilibrium line altitude; AAR—accumulation-area ratio; GPS—Global Positioning System. *Cost (in US$): = <$1,000; $$ = $1,000-$10,000, $$$ = >$10,000. † Labor intensity: Low = <...
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Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2421(06)
... and inclusions in the melts of natural carbonatite rocks (from Kokchetav and Chagatai massifs); (5) high-pressure experimental data on melting equilibrium in the silicate-sulfide system; (6) the physicochemical mechanisms of nucleation and growth of diamond in the parental media with natural chemistry; and (7...
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2409(09)
... to determine equilibrium line altitudes and on their potential implications for Pleistocene climate change in the eastern Mediterranean. Mount Olympus is situated in northeastern mainland Greece, ∼265 km northwest of Athens and 60 km southwest of Thessaloniki. The mountain is 2917 m high and covers an area...
Journal Article
Published: 01 November 2001
European Journal of Mineralogy (2001) 13 (6): 1153-1161.
...John R. ASHWORTH; Valentin S. SHEPLEV; Vladimir V. KHLESTOV; Vyatcheslav A. ANANYEV Abstract A simple extension of geothermobarometric technique is developed, from the usual case of assumed equilibrium among all minerals, to layered coronas with gradients of chemical potential. For reactions among...
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Journal Article
Published: 01 October 2001
The Canadian Mineralogist (2001) 39 (5): 1455-1472.
... for 16 O. For the first group of mineral pairs ( n ≥ a small variation in α across the study area (relative standard deviation ~0.05%) is viewed as an expression of a close approach to isotopic exchange equilibrium, and for certain pairs from the second group ( n = 1), a temperature estimate close to 700...
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Journal Article
Published: 01 August 2001
The Canadian Mineralogist (2001) 39 (4): 1039-1051.
... curve celsian + H 2 O = cymrite ( Essene 1967 ). On the basis of the equilibrium location of this reaction, investigated by Seki & Kennedy (1964) , Nitsch (1980) and Graham et al. (1992) , cymrite is only stable at high pressures. The numerous documented occurrences of cymrite in low-P – low-T...
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Journal Article
Published: 01 June 2001
The Canadian Mineralogist (2001) 39 (3): 729-746.
... does not buffer the cation-exchange potentials in the fluid, at least at that scale. Gordiyenko et al. (1988) speculated about the chemical conditions necessary for the equilibrium Spd–Ms–Ab–Kfs (400°C, 100 MPa) present as aggregates in the more differentiated parts of many rare-metal...
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Journal Article
Published: 01 April 2001
The Canadian Mineralogist (2001) 39 (2): 421-446.
... the inclusion of additional phases can greatly influence mass-balance calculations. Magmatic sulfide ores form through a large number of different physical processes, including partial or fractional or equilibrium crystallization and segregation of magma and sulfides, magma replenishment and flow-through, zone...
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Journal Article
Published: 01 February 2001
Geochemistry: Exploration, Environment, Analysis (2001) 1 (1): 71-80.
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Journal Article
Journal: Economic Geology
Published: 01 September 2000
Economic Geology (2000) 95 (6): 1185-1196.
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Journal Article
Journal: Geology
Published: 01 September 2000
Geology (2000) 28 (9): 803-806.
... more uniform and less sensitive to average hillslope gradient. Our measurements show that contrasts in landscape erosion rates cannot be inferred from hillslope gradients alone, because landscapes can evolve toward a state of erosional equilibrium, in which steep and gentle slopes erode at similar...
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Journal Article
Published: 01 April 1999
The Canadian Mineralogist (1999) 37 (2): 443-468.
Journal Article
Published: 01 January 1999
Reviews in Mineralogy and Geochemistry (1999) 38 (1): 181-220.
Journal Article
Published: 01 December 1998
Mineralogical Magazine (1998) 62 (6): 743-757.
Journal Article
Published: 01 June 1998
European Journal of Mineralogy (1998) 10 (3): 473-482.