Abstract
ABSTRACT Solid bitumens, the residues of migrating hydrocarbons, may contain authigenic minerals closely comparable to those in organic-rich siliciclastic rocks. The minerals include quartz, feldspars, illite, and pyrite. Authigenic feldspars are of orthoclase or albite composition. In vanadium-rich bitumens, roscoelite is the dominant silicate phase. The minerals are recorded in bitumens from host rocks of Precambrian to Tertiary age. Silicate inclusions are particularly developed in large bitumen veins, which occupy major fluid-migration pathways. At a megascopic scale the bitumens appear to be pure hydrocarbon deposits, but the silicates indicate a major aqueous component in the hydrocarbon-bearing fluids. The sulfur-isotope systematics of fractionated bitumen samples are similar to those of sediments during early diagenesis, composed of 34S-depleted pyrite and 34S-enriched organic sulfur.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
