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SSHCZO -- Geophysics -- Gamma Ray Logs -- Shale Hills -- (2010)


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Created: Nov 05, 2019 at 9:59 p.m.
Last updated: Nov 06, 2019 at 3:10 a.m.
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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.

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Resource Level Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Susquehanna Shale Hills Critical Zone Observatory, Shale Hills
North Latitude
40.6659°
East Longitude
-77.9015°
South Latitude
40.6638°
West Longitude
-77.9071°

Temporal

Start Date:
End Date:

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
subtitle Level 0 - Raw Data
disciplines Geophysics
variables Depth (m), Count (cps)
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
czos Shale Hills
czo_id 2653

How to Cite

Singha, K. (2019). SSHCZO -- Geophysics -- Gamma Ray Logs -- Shale Hills -- (2010), HydroShare, http://beta.hydroshare.org/resource/2adfce4e5afb4b1f990e2f28c1d65a61

This resource is shared under the Creative Commons Attribution CC BY.

 http://creativecommons.org/licenses/by/4.0/
CC-BY

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