Isotope analysis of closely adjacent minerals

Details Isotope analysis of closely adjacent minerals Isotope analysis of closely adjacent minerals

1989-04-12

1990-10-23

Wax, Robert A.

Chemistry: analytical and immunological testing

Geochemical, geological, or geothermal exploration

For petroleum oils or carbonaceous minerals

422 78, 422 80, G01N 3324

Patent

active

049652095

ABSTRACT:
Method and apparatus are provided for analyzing closely adjacent minerals in specimens of naturally occuring minerals. A sectioned mineral sample is mounted on a glass slide and placed in a vacuum chamber. An optical microscope is used to examine the sample through a window in the vacuum chamber. A laser beam is used for pyrolyzing a portion of the specimen causing gases to be released. Gases released from the mineral are analyzed by a mass spectrometer. Relative movement of the sample and laser beam, pyrolysis of target samples, and analysis of released gases can be automated.

REFERENCES:
"Mass Spectrometric Determination of Gases in Individual Fluid Inclusions in Natural Minerals", Anal. Chem., Barker et al., vol. 58, No. 7, 6-86, pp. 1330-1333.
"Reviews in Minerology, Fluid Inclusions", vol. 12, Minerology Society of Amer., pp. 109, 117, 122-129.
"Changes in Carbon and Oxygen Isotope Composition During Isotope Diagenesis", Dickson et al., Sedimentology, (1980), 27, 107-118.

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