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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 66 (1982)

Issue: 7. (July)

First Page: 982

Last Page: 982

Title: Hydrothermal Resources of Makushin Volcano Region of Unalaska Island, Alaska: ABSTRACT

Author(s): John W. Reeder

Article Type: Meeting abstract


Eight fumarole fields have been located in the Makushin Volcano region of Unalaska Island. Large vapor-dominated hydrothermal reservoirs are suspected to exist in the region of the fumarole fields located on the southeast flank of Makushin Volcano. The driving heat sources for some of these reservoirs might be at vertical depths of several kms and located laterally to the west, northwest, and north. The other fumarole fields are suspected to have driving heat sources near the surface, where these fumarole fields are in or near centers of Quaternary volcanic activity. The locations of the southeast-flanking fumarole fields are controlled by plutonic-metavolcanic contact boundaries and corresponding fractures, as well as by large northwest-trending fracture systems that are believed to have been caused by tectonic stresses.

There is a need for deep exploratory drilling within this geothermal resource area in order to define the potential of any hydrothermal reservoirs. Further exploration is planned.

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Copyright 1997 American Association of Petroleum Geologists