mountain landscape

GEOCHEMICAL ANALYSES

NOBLE GAS ANALYSIS

Noble gases are particularly useful for tracing fluid flow because their elemental and isotopic abundances are maintained independent of microbial activity, chemical reactions, and changes in oxygen fugacity.

Isotopes Measured:

  • Helium - He-3, He-4

  • Neon - Ne-20, Ne-21, Ne-22

  • Argon - Ar-36, Ar-38, Ar-40

  • Krypton - Kr-78, Kr-80, Kr-82, Kr-83, Kr-84, Kr-86

  • Xenon - Xe-124, Xe-126, Xe-128, Xe-129, Xe-130, Xe-131, Xe-132, Xe-134, Xe-136

Instrument:

ThermoFisher Helix Split Flight Tube Noble Gas Mass Spectrometer

 

MAJOR GAS ANALYSIS

Determine what the main components of your sample are. Major gas analyses are included in a noble gas analysis.

Compounds Measured:

  • Nitrogen

  • Oxygen

  • Argon

  • Carbon Dioxide

  • Methane

  • Ethane

  • Hydrogen

  • Hydrogen Sulfide

Instrument:

SRS Residual Gas Analyzer Quadrupole Mass Spectrometer

 

HYDROCARBON ANALYSIS

Determine the composition of produced gases or dissolved gases in groundwater with increased focus on hydrocarbons.

Compounds Measured:

  • Hydrocarbons

    • Methane

    • Ethane

    • Propane

    • isoButane

    • Butane​

    • isoPentane

    • Pentane

    • Hexane+

  • Carbon Dioxide​

  • Nitrogen

  • Oxygen

Instrument:

SRI 8610C Multi-Gas Gas Chromatograph with FID and TCD Detectors

 

TRITIUM AND RESIDENCE TIME OF WATER OR GAS

Compounds Measured:

  • H-3 concentrations (in T.U.) in water

  • H-3/He-3 mean residence time in water for young water (<~80 years)

  • He-4 mean residence time in water or gas for older water