| Abstract: | Borehole geophysical logging for site characterization in the volcanic rocks at the proposed nuclear waste repository at Yucca Mountain, Nevada, requires data collection under rather unusual conditions. Logging tools must operate in rugose, dry holes above the water table in the unsaturated zone. Not all logging tools will operate in this environment, therefore; careful consideration must be given to selection and calibration. A sample suite of logs is presented that demonstrates correlation of geological formations from borehole to borehole, the definition of zones of altered mineralogy, and the quantitative estimates of rock properties. We show the results of an exploratory calculation of porosity and water saturation based upon density and epithermal neutron logs. Comparison of the results with a few core samples is encouraging, particularly because the logs can provide continuous data in boreholes where core samples are not available. |
| Genre: | Conference Paper |
| ProdID: | 70016584 |
| Citation Author: | Schimschal, Ulrich; Nelson, Philip, H. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | Anon |
| Citation End Page: | 801 |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | High Level Radioactive Waste Management |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 7 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | Publ by ASCE |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Geophysical borehole logging in the unsaturated zone, Yucca Mountain, Nevada; 1991; Conference Paper; High Level Radioactive Waste Management; Schimschal, Ulrich; Nelson, Philip, H. |
| Citation Start Page: | 795 |
| Citation Volume: | |
| Citation Year: | 1991 |
| Type: | citation/reference |
| Text: | Geophysical borehole logging in the unsaturated zone, Yucca Mountain, Nevada; 1991; Conference Paper; High Level Radioactive Waste Management; Schimschal, Ulrich; Nelson, Philip, H. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1991 00:00 -0600 |
| Publisher: | Publ by ASCE |
