Mass spectrometric determination of gases in individual fluid inclusions in natural minerals
Fluid inclusions in minerals provide a source of geologically significant fluids. A new computerized mass spectrometric technique for analyzing volatiles in individual inclusions has been developed. The inclusions are opened by decrepitation in vacuum, and the computer recognizes the abrupt rise in pressure and controls the mass spectrometer. This scans continuously from 1 to 65 amu every 25 ms, which is within the time constraints of a bursting inclusion. The peak height for each mass in each spectrum is measured and stored along with the background data. Data are reduced after analysis. Each mass number is assigned its own attenuation factor by the computer in a preliminary analysis. This permits the determination of trace components down to 1 part in 10,000. With this system it is possible to analyze up to 225 inclusions in 1 h using a 10-mg sample of quartz, calcite, plagioclase, pyroxene, galena, or other mineral.
- Research Organization:
- Univ. of Tulsa, OK
- DOE Contract Number:
- FG05-84ER13220
- OSTI ID:
- 5685147
- Journal Information:
- Anal. Chem.; (United States), Vol. 58:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ANORTHOSITES
QUANTITATIVE CHEMICAL ANALYSIS
CALCITE
GALENA
GASES
MASS SPECTROSCOPY
PYROXENES
QUARTZ
CRYSTAL DEFECTS
EXPERIMENTAL DATA
IMPURITIES
INCLUSIONS
TRACE AMOUNTS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
CHALCOGENIDES
CHEMICAL ANALYSIS
CRYSTAL STRUCTURE
DATA
FLUIDS
GABBROS
IGNEOUS ROCKS
INFORMATION
LEAD COMPOUNDS
LEAD SULFIDES
MINERALS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PLUTONIC ROCKS
ROCKS
SILICATES
SILICON COMPOUNDS
SILICON OXIDES
SPECTROSCOPY
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
580400* - Geochemistry- (-1989)
400104 - Spectral Procedures- (-1987)