MINERALOGICAL STUDIES OF THE HYDROTHERMAL SYSTEM IN NEWBERRY VOLCANO DRILL HOLE 2, OREGON.
By: Terry E.C. Keith, Keith E. Bargar, Stephen S. Howe, William W. Carothers, and Ivan Barnes
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Abstract
Studies of secondary mineral distribution, whole-rock chemical compositions, isotopes, and fluid inclusions are being conducted on the core from Newberry Volcano drill hole 2. Rocks from the drill core are divided into 3 major intervals on the basis of their alteration pattern, which is controlled by rock permeabilities, primary lithologies, and temperatures. Incomplete alteration of pumice-rich lithic tuff layers in the upper part of the altered section and lack of self-sealing in fractures of most lava flows suggest that the hydrothermal system is young. Most of the secondary minerals could have been formed at temperatures near those present today; maximum measured temperature was 265 degree C at the bottom of the hole. Fluid inclusions indicate that past temperatures in the deeper part of the drill hole may have been as much as 100 degree C hotter than presently measured temperatures.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | MINERALOGICAL STUDIES OF THE HYDROTHERMAL SYSTEM IN NEWBERRY VOLCANO DRILL HOLE 2, OREGON. |
| ISBN | 0934412588 |
| Volume | 8 |
| Year Published | 1984 |
| Language | English |
| Publisher | Geothermal Resources Council |
| Publisher location | Davis, CA, USA |
| Larger Work Title | Transactions - Geothermal Resources Council |
| First page | 125 |
| Last page | 128 |
| Conference Title | Geothermal Energy: Bet on It! Geothermal Resources Council 1984 Annual Meeting. |
| Conference Location | Reno, NV, USA |
| Google Analytic Metrics | Metrics page |