Laser-based, in situ measurements of fine-scale variations in the [delta][sup 18]O values of hydrothermal quartz
Journal Article
·
· Geology; (United States)
- Dartmouth College, Hanover, NH (United States)
Recently developed laser-based techniques have been used to make in situ measurements of the [delta][sup 18]O values of hydrothermal vein quartz from the Tayoltita and Guanajuato mining districts of Mexico. The [delta][sup 18]O[sub qtz] values within a single 2 [times] 5 cm sample of banded quartz from Guanajuato varied from 12.6[per thousand] to 17.3[per thousand]. Similarly, [delta][sup 18]O[sub qtz] values measured in a 2 [times] 3 cm sample from Tayoltita ranged from 5.7[per thousand] to 9.5[per thousand]. In both cases, the spread of [delta][sup 18]O values measured within individual samples is comparable to the total ranges of [delta][sup 18]O values previously reported for vein samples from the respective districts. Fluid-inclusion homogenization temperatures measured for these samples rule out the possibility that the changes in the [delta][sup 18]O values observed could have been caused by temperature fluctuations; therefore, they must be the result of large shifts in the isotopic composition of the vein fluids.
- OSTI ID:
- 6962747
- Journal Information:
- Geology; (United States), Journal Name: Geology; (United States) Vol. 20:9; ISSN 0091-7613; ISSN GLGYBA
- Country of Publication:
- United States
- Language:
- English
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Thesis/Dissertation
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Related Subjects
15 GEOTHERMAL ENERGY
152002* -- Geothermal Data & Theory-- Properties of Minerals & Rocks
58 GEOSCIENCES
580000 -- Geosciences
CHEMICAL ANALYSIS
CHEMISTRY
DEVELOPING COUNTRIES
EVEN-EVEN NUCLEI
FLUIDS
GEOCHEMISTRY
GEOTHERMAL FLUIDS
GEOTHERMAL SYSTEMS
GROUND WATER
HYDROGEN COMPOUNDS
HYDROTHERMAL ALTERATION
HYDROTHERMAL SYSTEMS
ISOTOPE RATIO
ISOTOPES
LASERS
LATIN AMERICA
LIGHT NUCLEI
MEXICO
MINERALIZATION
MINERALS
NORTH AMERICA
NUCLEI
OXIDE MINERALS
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
QUARTZ
ROCK-FLUID INTERACTIONS
STABLE ISOTOPES
WATER
152002* -- Geothermal Data & Theory-- Properties of Minerals & Rocks
58 GEOSCIENCES
580000 -- Geosciences
CHEMICAL ANALYSIS
CHEMISTRY
DEVELOPING COUNTRIES
EVEN-EVEN NUCLEI
FLUIDS
GEOCHEMISTRY
GEOTHERMAL FLUIDS
GEOTHERMAL SYSTEMS
GROUND WATER
HYDROGEN COMPOUNDS
HYDROTHERMAL ALTERATION
HYDROTHERMAL SYSTEMS
ISOTOPE RATIO
ISOTOPES
LASERS
LATIN AMERICA
LIGHT NUCLEI
MEXICO
MINERALIZATION
MINERALS
NORTH AMERICA
NUCLEI
OXIDE MINERALS
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
QUARTZ
ROCK-FLUID INTERACTIONS
STABLE ISOTOPES
WATER