geothermometry


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geothermometry

[¦jē·ō·thər′mäm·ə·trē]
(geology)
Measurement of the temperatures at which geologic processes occur or occurred. Also known as geologic thermometry.
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Assessment of Reservoir Temperatures of Thermal Springs of the Northern Areas of Pakestan by Chemical and Isotope Geothermometry, Geothermics, 31: 613-631.
75 SiO2 Table 3: Results of geothermometry of Geno hot spring samples in different seasons.
1 Amphibole- plagioclase thermometry Wiborg Wiborgite 650-750 * Two-feldspar geothermometry Wiborg Wiborgite 580-650 * Two-feldspar geothermometry Salmi Wiborgite 740-780 Zircon thermometry Salmi Wiborgite 680-720 Zircon thermometry Uljalegi Amphibole, 700-840/940 * Zircon quartz crystallization phenocryst temperature modelling by Watson & Harrison (1983) Aland (A3) Monzonite 750-840 7.
Geothermometry from geothermal fluid collected during flow tests predicts source temperatures of 380-396xF (193-202xC) in good agreement with measured temperatures.
Monazite-saturation geothermometry (Montel 1993) yields temperatures as high as 825-950[degrees]C for the MPG, similar to those of the MBG (834-950[degrees]C).
Two-feldspar geothermometry yields temperatures lower than 500[degrees]C, reflecting subsolidus recrystallisation.
According to amphibole-plagioclase geothermometry, temperatures calculated for co-genetic amphibole and plagioclase of five granodiorite sampies indicate they crystallized between 729- 772[degrees]C, which is near the wet granodiorite solidus (3 to 5 kb).
Geothermometry suggests a minimum reservoir temperature of 155xC with indications up to 225xC.
Previous geothermometry work on Pumpernickel has produced reservoir temperature estimates ranging from 150 degrees C (302 degrees F) to 218 degrees C.
In the mid 1980's, Gordon Bloomquist visited the site on behalf of the Bonneville Power Administration; at that time geothermometry indicated source water temperatures of 185 degrees C/365 degrees F and the resource potential was estimated at 85 MW.