Geothermal resource assessment in the Aleutian Islands and Alaska peninsula: Quarterly progress report, January 1--March 30, 1989

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...

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Bibliographic Details
Main Authors: Turner, D.L., Nye, C.J.
Language:unknown
Published: 2007
Subjects:
15 GEOTHERMAL ENERGY
GEOTHERMAL RESOURCES
RESOURCE ASSESSMENT
VOLCANIC ROCKS
AGE ESTIMATION
ALASKA
ALEUTIAN ISLANDS
ARGON
BIOTITE
PLUTONIC ROCKS
POTASSIUM
PROGRESS REPORT
VOLCANOES
X-RAY SPECTROSCOPY
ALKALI METALS
DOCUMENT TYPES
ELEMENTS
FEDERAL REGION X
FLUIDS
GASES
IGNEOUS ROCKS
ISLANDS
METALS
MICA
MINERALS
NONMETALS
NORTH AMERICA
RARE GASES
RESOURCES
ROCKS
SILICATE MINERALS
SPECTROSCOPY
USA
Alaska
Aleutian Islands
Online Access:http://www.osti.gov/servlets/purl/6303120
https://www.osti.gov/biblio/6303120
https://doi.org/10.2172/6303120
Description
Summary: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.

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