Element cycling in the Middle-Late Triassic Shublik Formation: Mineralization vs. recycling of biolimiting nutrients in an unconventional resource play

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Abstract

The Triassic Shublik Formation in northern Alaska is one of the major source rocks in North America, having generated much of the petroleum in Prudhoe Bay and associated fields. The middle Shublik Formation, the focus of this study, is a highly phosphatic, organic-rich carbonate mudstone interval. Apatite cements can occur as phosphatic peloids, steinkerns, elongate or angular nodules, and shells or shell fragments. We propose a model whereby phosphatization is favored in early diagenetic environments that have low concentrations of dissolved iron relative to reactive organic matter in the pore water sulfate reduction zone.

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Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Element cycling in the Middle-Late Triassic Shublik Formation: Mineralization vs. recycling of biolimiting nutrients in an unconventional resource play
Year Published 2019
Language English
Publisher CSPG
Contributing office(s) Central Energy Resources Science Center
Description 11 p.
Larger Work Type Book
Larger Work Subtype Conference publication
Larger Work Title New directions in geosciences for unconventional resources
Conference Title New Directions in Geosciences for Unconventional Resources
Conference Location Banff, Canada
Conference Date October 15-17, 2019
Country United States
State Alaska
Other Geospatial National Petroleum Reserve
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