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| Created: | Nov 19, 2019 at 2:35 a.m. (UTC) | |
| Last updated: | Dec 23, 2019 at 10:42 p.m. (UTC) | |
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| Content types: | Single File Content |
| Sharing Status: | Public |
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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
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Temporal
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Additional Metadata
| Name | Value |
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| 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
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