| 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. |
| Genre: | Conference Paper |
| ProdID: | 70013467 |
| Citation Author: | Keith, Terry, E. C.; Bargar, Keith, E.; Howe, Stephen, S.; Carothers, William, W.; Barnes, Ivan |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 128 |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Transactions - Geothermal Resources Council |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 4 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | Geothermal Resources Council |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | MINERALOGICAL STUDIES OF THE HYDROTHERMAL SYSTEM IN NEWBERRY VOLCANO DRILL HOLE 2, OREGON.; 1984; Conference Paper; Transactions - Geothermal Resources Council; Keith, Terry, E. C.; Bargar, Keith, E.; Howe, Stephen, S.; Carothers, William, W.; Barnes, Ivan |
| Citation Start Page: | 125 |
| Citation Volume: | 8 |
| Citation Year: | 1984 |
| Type: | citation/reference |
| Text: | MINERALOGICAL STUDIES OF THE HYDROTHERMAL SYSTEM IN NEWBERRY VOLCANO DRILL HOLE 2, OREGON.; 1984; Conference Paper; Transactions - Geothermal Resources Council; Keith, Terry, E. C.; Bargar, Keith, E.; Howe, Stephen, S.; Carothers, William, W.; Barnes, Ivan |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1984 00:00 -0600 |
| Publisher: | Geothermal Resources Council |
