Major-oxide and trace-element analyses of rock samples from the West Susitna area STATEMAP project, Cook Inlet, Alaska

Major-oxide and trace-element analyses of rock samples from the West Susitna area STATEMAP project, Cook Inlet, Alaska, Raw Data File 2025-21, provides whole-rock geochemical analyses, including major-oxide and trace-element concentrations, from bedrock samples that DGGS staff collected during the 2024 field season as part of the Alaska Division of Geological & Geophysical Surveys' (DGGS) West Susitna STATEMAP project. The project is a 1:50,000-scale geologic mapping initiative to characterize geology, assess geologic hazards, and investigate tectonic features within a region of increasing interest for resource development, alternative energy, and recreation. The study area lies in the West Susitna region of southcentral Alaska. It spans approximately 500 mi2 across the Tyonek C-3, C-4, D-4, and D-5 quadrangles, including ~50 miles of the proposed West Susitna Access Corridor that connects Anchorage to the Happy River Valley on the western margin of the Susitna Basin. Major- and trace-element geochemical analyses were obtained for plutonic and volcanic rocks to define map units and determine the magmatic history of the area. These data are provided as a Raw Data File under an open end-user license and are available on the DGGS website: http://doi.org/10.14509/31725.