Re–Os elemental and isotopic systematics in crude oils

Re-assessing the surface cycling of molybdenum and rhenium

“…Anthropogenically-enhanced delivery of Mo and Re to modern oceans is expected on the basis of the high concentrations of these metals in fossil fuels (Bertine and Goldberg, 1971;Poplavko et al, 1974;Duyck et al, 2002;Selby et al, 2005Selby et al, , 2007a, and their presence in fuel processing catalysts (Chang, 1998;Moyse, 2000). Furthermore, the use of Re in brake liners is thought to be the source for high concentrations of Re (up to 10 ng g À1 ) in road dusts (Meisel and Stotter, 2007).…”

Evaluating Re–Os systematics in organic-rich sedimentary rocks in response to petroleum generation using hydrous pyrolysis experiments

“…The greater bitumen content of the Phosphoria samples (1.6 vs. 0.03 wt.% for the Staffin Formation) permits the extraction of an asphaltene fraction from the bitumen component. The extracted maltene fraction was not analysed as the small (<0.01 g) amounts inhibited precise ID-NTIMS analysis and previous work has shown that the maltene contains very minor amounts of Re and Os (<14% of total extract; Selby et al, 2007). The asphaltene abundance is not mass balanced as together with the maltene it represents 100% of the bitumen.…”

“…Crude oil generated from ORS through the maturation of organic matter is enriched in Re and Os, which has been transferred from source rocks (Barre et al, 1995;Woodland et al, 2001;Selby and Creaser, 2005b;Selby et al, 2007;Finlay et al, 2010). Applying Re-Os geochronology directly to crude oil has yielded ages that are in excellent agreement with basin models and are suggested to constrain petroleum generation events (Selby et al, 2005;Selby and Creaser, 2005a;Finlay et al, 2011a).…”

Preparation and performance of fluorescent polyacrylamide microspheres as a profile control and tracer agent

“…These include chemical tracers (Wang et al 2004b), nuclear tracers (Bjørnstad et al 1990;Lien et al 1988) and isotope tracers (Selby et al 2007;Osborn and McIntosh 2010). However, some chemical tracers are easily absorbed onto the surface of rocks in the stratum, and the instruments required to detect radioactive isotopes are extremely expensive.…”