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OPEN-FILE REPORT 543

OFR-543RESERVOIR CHARACTERIZATION OF CLASTIC CYCLE SEQUENCES IN THE PARADOX FORMATION OF THE HERMOSA GROUP, PARADOX BASIN, UTAH
Bruce D. Trudgill and W. Curtis Arbuckle

This extensive report includes maps and correlations of the evaporite facies within the Pennsylvanian Paradox Formation throughout the northern Paradox Basin. This includes correlation of individual evaporite cycles and their respective clastic zones. The resulting associations are used to better understand the cyclicity of the Paradox Formation and its relationship to the structural development and evolution of the Ancestral Rocky Mountain Uncompahgre uplift.

The report includes a discussion of regional geology; evaporite depositional cycles and environments, regional correlations, clastic interbeds and salt (halite) lithologies; climate controls on evaporate cyclicty; well and outcrop data analysis including QEMSCAN analysis; structural and sequence stratigraphic discussions of the Paradox Basin and Uncompahgre uplift. The report includes five tables, 70 figures, and appendices of well database, isopach maps, and evaporate cycle age estimates. This work was funded by the Utah Geological Survey under the “Characterization of Utah’s Hydrocarbon Reservoirs and Potential New Reserves” program (FY 2007).

CD (106 p. + 39 p. appendices)

OFR-543………$14.95

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OPEN-FILE REPORT 544

OFR-544MULTIPROXY ENVIRONMENTAL CHARACTERIZATION OF LAKE LEVEL CYCLES IN THE GREEN RIVER FORMATION OF UTAH AND COLORADO
Jessica H. Whiteside and Marc A. Van Keuren

The Eocene Green River Formation represents the largest unconventional petroleum resource in Utah. While oil shale has figured prominently in the literature for the past century, surprisingly little basic knowledge of the geochemistry of these deposits exists, especially within the context of the characteristic and permeating lacustrine cyclicity. This research documents the ecosystem context of this cyclicity using sedimentary facies, oil-shale yield, total organic carbon, bulk nitrogen (δ15N) and carbon isotopic (δ13C) signatures of organic matter, and specific biomarker hydrocarbons (δ13Calk) sampled at millennial resolution through a series of cycles at multiple localities in core and outcrop. This project should lead to a greater understanding of the most fundamental aspects of the depositional history of these oil shales and the predictive power of facies models, all of which should ultimately play a part in Utah’s hydrocarbon potential. Also included are high-resolution photographs of the core studied during this project.

CD (22 p.)

ORF-544………. $7.95 (print on demand)………. $14.95 (CD)

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Western States Seismic Policy Council Names 2009 Awards in Excellence Winners

The Utah Geological Survey was selected for a 2009 WSSPC Award in Excellence in Research for their Wasatch and Sevier Faults Paleoseismic Research. The Awards will be given at the joint WSSPC-Earthquake Engineering Research Institute annual conference at the Hilton Salt Lake City Center in Salt Lake City, Utah at a banquet Friday February 13, 2009. The WSSPC Awards in Excellence program was started in 1996 to recognize achievement in different areas of earthquake mitigation, preparedness and response.

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