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    Rhenium osmium dating

    The Os value calculated at the time of deposition (Osi) can also provide information on whether deposition occurred in a lacustrine or an open marine environment.When oil is formed from a source rock, a proportion of the Re and Os from the source rock is transferred to the oil, thus one can date the formation process using the Re - Os geochronometer.The information presented below briefly outlines how Chemostrat is utilising two of these techniques, i.e., the Rhenium - Osmium (Re - Os) isotopic dating technique and the Uranium - Lead (U - Pb) isotopic dating technique, to assist the petroleum industry in the goals of oil and gas exploration.Re and Os become concentrated in the organic, hydrogenous fraction of organic rich shales, thus the time when the shale was deposited can be dated.En 1960, il a reçu le prix Nobel de chimie pour le développement de cette méthode (cf.

    Re - Os dating and oil - source rock correlation is actually helped if the oils are highly biodegraded, e.g., oil sands, tar mats and bitumen-stained sandstones (where traditional techniques such as biomarker identification are disrupted), as this concentrates Re and Os within an oil making analysis easier.Peridotite xenoliths which are thought to sample the upper mantle sometimes contain supra-chondritic Os-isotopic ratios.Over the years, Chemostrat has expanded the services on offer to now include more advanced isotopic techniques that so far have been used only in academia.Rhenium’s average crustal abundance is 1 part per billion (ppb) with 9 oxidation states (-1 to 7), and is generally found in one of two isotopes in the crust: .Both Re and Os display organophilic behaviour and can form amino acid complexes (Figure 1).

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