INTERPRETING GEOTHERMAL PROCESSES AND FLUID SOURCES FROM FLUID INCLUSION ORGANIC COMPOUNDS AND CO2/N2 RATIOS
- Key words
- organic species, fluid inclusions
- Location
- Coso, California; Karaha-Telaga Bodas, Indonesia; Java; Cerro Prieto, Mexico
- Conference
- Stanford Geothermal Workshop
- Year
- 2002
- Session
- Geology
- Language
- English
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Abstract
The distribution of organic species is explored using data acquired from a new dual quadrupole system that routinely measures eighteen gaseous species. The process of condensation and its affect on gas distribution is modeled, and a new discrimination diagram based on total gaseous species and the CO2/N2 ratio is introduced.
We conclude that organic species concentrations indicate source; that pyrolysis of organic material produces significant aromatic compounds; that Fischer-Tropsch reactions produce organic species dominated by methane; CO2/N2 vs. total gas plots are useful for illustrating boiling and condensation processes; and Cerro Prieto gas concentration are consistent with the gaseous species being modified by input of magmatic volatiles.
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