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New geologic map available for the east-central North Slope


(Fairbanks, AK) – The Division of Geological & Geophysical Surveys (DGGS) has published a geologic map of the east-central North Slope. The map covers more than 1,200 square miles of the south-central Sagavanirktok Quadrangle of northern Alaska, a region near existing infrastructure and prospective for oil and gas resources. The purpose of the new map is to improve understanding of the region’s petroleum geology, thereby reducing exploration risk and potentially attracting new industry investment on State lands.

The 1:63,360-scale geologic map represents original field work conducted by DGGS in collaboration with the Division of Oil & Gas. Data from more than 800 field stations were integrated with available well log and seismic data to produce a robust interpretation of the stratigraphy and structural geology. Important findings include the discovery of several new oil-stained locations and the documentation of fold geometries – a key component in evaluating hydrocarbon trapping mechanisms. The map is accompanied by a 24-page explanatory booklet, a structural cross section, a well-log correlation, and a new regional chronostratigraphic diagram. This detailed information offers new insight into the subsurface petroleum geology elsewhere on the North Slope, including improved predictions of potential reservoir rocks.

The work was funded by the State of Alaska and the STATEMAP program administered by the U.S. Geological Survey. The map and related products can be downloaded at no charge from the DGGS website at http://dx.doi.org/10.14509/29138.

Alaska Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS)


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