Julie A Dumoulin

Subsurface stratigraphic picks of the Middle–Upper Triassic Shublik Formation, Alaska North Slope

The Middle–Upper Triassic Shublik Formation is the main source rock for Arctic Alaska oil and gas accumulations, including the supergiant Prudhoe Bay field. A revised stratigraphic framework recently has been developed in outcrop for the Shublik and related strata that delineates three large-scale stratigraphic units: 1) the lower clastic (LC) unit, 2) the middle carbonate-chert (MCC) unit, and 3) the upper clastic-carbonate (UCC) unit. The three stratigraphic units were interpreted to comprise five transgressive-regressive (T-R) sequences (LC1, MCC1, MCC2, MCC3, and UCC1). This outcrop-based framework has been extended to the subsurface of the Alaska North Slope using gamma-ray logs from 161 exploration wells....

Categories: Data; Tags: Alaska, Earth Science, Energy Resources, Geology, Natural Gas, All tags... Natural Resources, North Slope, Oil, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), gamma-ray logging, stratigraphy, Fewer tags

U-Pb Isotopic Data and Ages of Detrital Zircon from Selected Rocks from northern Yukon, Canada

This data set contains U-Pb isotopic data and associated ages of detrital zircon from sedimentary and metasedimentary rocks collected in northern Yukon, Canada. The samples were originally collected as part of geological mapping and research conducted by the Geological Survey of Canada. They were recovered from archived collections and sent to the U.S. Geological Survey for analysis of detrital zircon using U-Pb geochronology methods. Detrital zircon grains were separated and analyzed by GeoSep Services (GSS) in 2015 using laser-ablation-inductively-coupled-plasma-mass spectrometry (LA-ICP-MS) techniques.

Categories: Data, Data Release - Revised; Tags: Cache Creek, Cache Creek, Detrital zircon, Earth science, Geochemistry, All tags... Geochronology, Geology, GeoscientificInformation, Igneous rocks, Mineral Resources, Porcupine River, Salmon Cache Canyon, Sedimentary rocks, U-Pb, USGS Science Data Catalog (SDC), Uranium-lead analysis, Yukon, Fewer tags