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Abstract
Natural gamma ray logs are indicating the concentration of thorium (Th), uranium (U), and potassium (K) in the rocks surrounding a borehole and they are a measurement of the natural radioactivity of the formation. The energy of the gamma-rays (photons) differs for Th, U, and
K. Potassium emits only gamma photons of energy 1.46 MeV. Thorium emits gamma photons of a number of different energies, the highest of which is 2.62 MeV. Uranium similarly emits gamma photons of a number of different energies with 1.76 MeV as the highest energy that can be detected in a borehole. Here the values indicate total gamma ray energy and are function of well depth.
Subject Keywords
Coverage
Spatial
Temporal
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Content
ReadMe.md
SSHCZO -- Geophysics -- Gamma Ray Logs -- Shale Hills -- (2010)
OVERVIEW
Description/Abstract
Natural gamma ray logs are indicating the concentration of thorium (Th), uranium (U), and potassium (K) in the rocks surrounding a borehole and they are a measurement of the natural radioactivity of the formation. The energy of the gamma-rays (photons) differs for Th, U, and K. Potassium emits only gamma photons of energy 1.46 MeV. Thorium emits gamma photons of a number of different energies, the highest of which is 2.62 MeV. Uranium similarly emits gamma photons of a number of different energies with 1.76 MeV as the highest energy that can be detected in a borehole. Here the values indicate total gamma ray energy and are function of well depth.
Creator/Author
Singha, Kamini
CZOs
Shale Hills
Contact
Dr. Kamini Singha, Associate Professor, Hydrologic Sciences and Engineering Program, Colorado School of Mines, 1516 Illinois Street, 311E Berthoud Hall, Golden, CO 80401, (303) 273-3822, ksingha@mines.edu
Subtitle
Level 0 - Raw Data
SUBJECTS
Disciplines
Geophysics
Topics
Geophysics
Subtopic
Gamma Ray Logs
Keywords
natural gamma ray logging|CZMW bore wells|GP bore-wells|potassium concentration|uranium concentration|thorium concentration
Variables
Depth (m)|Count (cps)
Variables ODM2
Counter|Depth
TEMPORAL
Date Start
2010-05-01
Date End
2010-05-01
SPATIAL
Field Areas
Susquehanna Shale Hills Critical Zone Observatory
Location
Shale Hills
North latitude
40.6658525842
South latitude
40.6638469022
West longitude
-77.90706460189999
East longitude
-77.9014874071
REFERENCE
Citation
The following acknowledgment should accompany any publication or citation of these data: Logistical support and/or data were provided by the NSF-supported Shale Hills Susquehanna Critical Zone Observatory.
CZO ID
2653
COMMENTS
Comments
Wire-line logging: The natural gamma log system consists of a gamma ray detecting probe, geophysical logging cable and a digital counter instrument. It is done by lowering the probe down the drill hole and recoding the gamma radiation variation (in count-per-second) with depth (in meters). Two data sets for each well: Down and Up. Down: From top of the well to bottom of the well. Up: From bottom of the well to top of the well. Depth in meters in first column and gamma radiation variations in count-per-second in the second column.
Additional Metadata
| Name | Value |
|---|---|
| czos | Shale Hills |
| czo_id | 2653 |
| citation | The following acknowledgment should accompany any publication or citation of these data: Logistical support and/or data were provided by the NSF-supported Shale Hills Susquehanna Critical Zone Observatory. |
| comments | Wire-line logging: The natural gamma log system consists of a gamma ray detecting probe, geophysical logging cable and a digital counter instrument. It is done by lowering the probe down the drill hole and recoding the gamma radiation variation (in count-per-second) with depth (in meters). Two data sets for each well: Down and Up. Down: From top of the well to bottom of the well. Up: From bottom of the well to top of the well. Depth in meters in first column and gamma radiation variations in count-per-second in the second column. |
| keywords | natural gamma ray logging, CZMW bore wells, GP bore-wells, potassium concentration, uranium concentration, thorium concentration |
| subtitle | Level 0 - Raw Data |
| variables | Depth (m), Count (cps) |
| disciplines | Geophysics |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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