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Secondary mineralogy of core from geothermal drill hole CTGH-1, High Cascade Range, Oregon

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Abstract

Geothermal drill hole CTGH-1, located near Breitenbush Hot Springs in the Cascade Mountains of northwest Oregon, was drilled to a depth of 1463 m. The maximum reported temperature at the bottom of the drill hole was 96.4??C. The drill core consists predominantly of basalt to basaltic andesite lava flows, tuffs, and volcanic breccia. Red to orange iron-oxide stained tuffs are at least partly altered to smectite. Vesicles, fractures, and open spaces between breccia fragments are partly to completely filled by secondary minerals. All of the minerals are compatible with the present low-temperature conditions.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Secondary mineralogy of core from geothermal drill hole CTGH-1, High Cascade Range, Oregon
Volume
12
Year Published:
1988
Language:
English
Publisher:
Publ by Geothermal Resources Council
Publisher location:
Davis, CA, United States
First page:
283
Last page:
289
Number of Pages:
7
Conference Title:
New Horizons
Conference Location:
San Diego, CA, USA
Conference Date:
9 October 1988 through 12 October 1988