... is not characterized by either method. Here, we show how open-system programmed thermal extraction and pyrolysis, LECO total organic carbon, Archimedes bulk density, and helium pycnometry measurements are integrated to calculate oil and gas pore volumes, characterize their composition, and estimate mobility. Use...

...Alton Brown ABSTRACT Helium and nitrogen variations in Panhandle–Hugoton field (PHF) gases are products of interaction between hydrocarbon gas from the Anadarko basin and at least two water masses with dissolved nitrogen and helium. The two most distinct water masses are from the Palo Duro basin...

...; detection limit 0.1 ppmv) by using two Fisons 8000-series Bench gas chromatographs. Helium (He) was also analyzed for these samples using a mass spectrometer (Varian Leak Detector; 10–4 atm cc/sec to 4 × 10–8 atm cc/sec). The statistical analysis of CO 2 and O 2 between the field and laboratory...

... of the cooling history from seven different field sites across the western Scottish Highlands using radiogenic apatite helium thermochronometry ([U-Th]/He; n = 14; ca. 31–363 Ma) and thermal modeling confirm that post-Caledonian heating and burial, as well as cooling and exhumation, must have been variable...

... chromatograph equipped with a TCD detector using He as carrier gas. The partial pressure of each gas species (CO 2 , N 2 , O 2 , Ar) was determined with reference to standards at different pressure. Helium partial pressures were determined by a leak detector (detection limit 0.00015 mbar) in a separate sample...

... , C.J. , 2006 , Seawater subduction controls the heavy noble gas composition of the mantle : Nature , v. 441 , p. 186 – 191 , doi:10.1038/n