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  Oil Shale

ISSN 1736-7492 (electronic)  ISSN 0208-189X (print)
Published since 1984

Oil Shale

ISSN 1736-7492 (electronic)  ISSN 0208-189X (print)
Published since 1984

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ORGANIC GEOCHEMISTRY OF THE PALEOCENE-EOCENE OIL SHALES OF THE GONGJUE FORMATION, NANGQIAN BASIN, EAST-CENTRAL TIBETAN PLATEAU; pp. 1–14

(Full article in PDF format) https://doi.org/10.3176/oil.2017.1.01


Authors

ZHAOLIN QI, YALIN LI, CHENGSHAN WANG, TAO SUN, JINHU ZHANG

Abstract

The Paleocene-Eocene oil shales of the Gongjue Formation in the Nangqian Basin, east-central Tibetan Plateau, were investigated for their petroleum potential by analysis of organic matter (OM) type, source, rich­ness, thermal maturity, and depositional environment. According to the Tmax and molecular indicators, the samples were found to be thermally immature or at the early stages of maturity. The hydrogen index (HI) values and atomic ratios of carbon, hydrogen and oxygen show that the organic matter of oil shales is primarily of Type I or II. The high share of gammacerane and the low pristane-to-phytane (Pr/Ph) ratio indicate that the organic matter was deposited in saline paleoenvironmental settings.

Keywords

Nangqian Basin, Gongjue Formation, Paleocene-Eocene oil shales, Tibetan Plateau, organic geochemistry.

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