Synthetic fluid inclusions in natural quartz. IV. Chemical analyses of fluid inclusions by SEM/EDA: Evaluation of method

Journal Article · Sun May 01 04:00:00 EDT 1988 · Geochimica et Cosmochimica Acta; (USA)

DOI:https://doi.org/10.1016/0016-7037(88)90252-9· OSTI ID:5152747

Haynes, F M ^[1]; Sterner, S M; Bodnar, R J ^[2]

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1. Univ. of Michigan, Ann Arbor (USA)
2. Virginia Polytechnic Institute, Blacksburg (USA)

The compositions of individual synthetic fluid inclusions in the systems NaCl-KCl, NaCl-CaCl{sub 2} and NaCl-KCl-CaCl{sub 2} have been semi-quantitatively determined by energy dispersive analysis of precipitates produced during thermal decrepitation. Inclusions containing known mixtures of 20 wt.% total salinity were synthesized by healing fractures in natural quartz at 600-700{degree}C and 5-7 kbars for 7-10 days. The two-phase, daughter-free inclusions homogenized at 170-250{degree}C, began to decrepitate after about 100{degree} of overheating and by 360-420{degree}C a significant number of decrepitates had formed on the polished surface. Peak heights generated by EDA (raster mode) of these decrepitates were standardized using both single and mixed salt standards evaporated to dryness in a vacuum. Although the mixed salt standards better approximated the decrepitate compositions, difficulties were encountered in producing micron-scale homogeneity and the single salts yielded more reliable results.

• OSTI ID: 5152747
• Journal Information: Geochimica et Cosmochimica Acta; (USA), Journal Name: Geochimica et Cosmochimica Acta; (USA) Vol. 52:5; ISSN GCACA; ISSN 0016-7037
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
ALKALI METAL COMPOUNDS
BRINES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
ELECTRON MICROSCOPY
FUNCTIONS
GEOCHEMISTRY
GEOTHERMOMETERS
GEOTHERMOMETRY
HALIDES
HALOGEN COMPOUNDS
INCLUSIONS
MEASURING INSTRUMENTS
MICROSCOPY
MINERALIZATION
MINERALS
MIXTURES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
QUARTZ
RESPONSE FUNCTIONS
SALINITY
SCANNING ELECTRON MICROSCOPY
SENSITIVITY ANALYSIS
SILICON COMPOUNDS
SILICON OXIDES
SODIUM CHLORIDES
SODIUM COMPOUNDS
SOLUTIONS
THERMOMETERS