Geothermal Resource Assessment in the Aleutian Islands and Alaska Peninsula: Quarterly Progress Report, January 1--March 30, 1989

• Main Authors: Turner, D. L., Nye, C. J.
• Format: Report
• Language: English
• Published: University of Alaska Fairbanks. Geophysical Institute. 1989
• Subjects: Elements; Rocks; Potassium; Geothermal Legacy; Progress Report; Document Types; Argon; 15 Geothermal Energy; Minerals; Plutonic Rocks; Mica; Volcanoes; 150201 > Geology & Hydrology Of Geothermal Systems > Usa > (-1989); Alaska; Age Estimation; Islands; Spectroscopy; Rare Gases; X-Ray Spectroscopy; Biotite; Metals; Volcanic Rocks; Alkali Metals; Igneous Rocks; Federal Region X; Geothermal Resources; Fluids; Gases; Aleutian Islands; Nonmetals; North America; Resource Assessment; Silicate Minerals; Resources; Usa Geothermal Legacy 150101* > Geothermal Energy > Resources & Availability > Usa > (-1989)
• Online Access: https://doi.org/10.2172/6303120; https://digital.library.unt.edu/ark:/67531/metadc1112391/

In this report the authors have now completed dating work on 20 rock samples. Analytical results for the dated samples are given in the enclosed table. The results are generally in good agreement with observed stratigraphic relationships and provide a well-constrained time framework for the eruptive history of this volcanic area. The argon extraction and potassium analyses are completed and the argon sample is awaiting mass spectrometry. In addition to documenting the eruptive history of Umnak volcanoes, the K-Ar ages will provide a time framework for the chemical evolution of the magmatic system, when combined with the rock chemistry analyses presently in progress at U.C., Santa Cruz. 1 tab.