Spectrum gamma ray borehole logging wire data of MeBo sediment core GeoB16601-7
type: Dataset
conforms to: http://mlcommons.org/croissant/1.0
creator: Tim Freudenthal
publisher: PANGAEA
  type: Organization
  disambiguating description: Data Publisher for Earth & Environmental Science
included in data catalog: PANGAEA
  type: DataCatalog
  disambiguating description: Data Publisher for Earth & Environmental Science
date published: 2020-06-08
additional type: dataset
description: Logging was performed with the sea floor drill rig MARUM-MeBo70 in a borehole drilled with a 103 mm diameter bit. The 1460 Slimhole Memory SGR instrument developed by ANTARES Datasystems GmbH was used. A CsI(Na) crystal with outer diameter of 37 mm and 250 mm length is used as detector. The probe provides Natural Gamma Ray counts and analyses the spectrum for the concentrations of the natural gamma ray emitters potassium, thorium and uranium with an accuracy of about 10%. The probe was deployed in the memory mode with the logging string being inserted into the drill string. The measurement was conducted as upcast by hooking up the probe inside the drill string with a wire. The trip out speed was about 3 cm/s and the logging frequency was 1 Hz. Data processing was conducted using the Antares software GeoBase5 including an environmental correction compensating for the attenuation of the gamma ray signal by the drill pipe.
abstract: Logging was performed with the sea floor drill rig MARUM-MeBo70 in a borehole drilled with a 103 mm diameter bit. The 1460 Slimhole Memory SGR instrument developed by ANTARES Datasystems GmbH was used. A CsI(Na) crystal with outer diameter of 37 mm and 250 mm length is used as detector. The probe provides Natural Gamma Ray counts and analyses the spectrum for the concentrations of the natural gamma ray emitters potassium, thorium and uranium with an accuracy of about 10%. The probe was deployed in the memory mode with the logging string being inserted into the drill string. The measurement was conducted as upcast by hooking up the probe inside the drill string with a wire. The trip out speed was about 3 cm/s and the logging frequency was 1 Hz. Data processing was conducted using the Antares software GeoBase5 including an environmental correction compensating for the attenuation of the gamma ray signal by the drill pipe.
spatial coverage: Place
  geo: GeoShape
    box: 20.150333333333 116.23966666667 20.151 116.24016666667
temporal coverage: 2012-05-25T10:06:00/2012-05-27T00:33:00
size: QuantitativeValue
  value: 12708.0
  unit text: data points
variable measured: DEPTH, sediment/rock
  type: PropertyValue
  unit text: m
  subject of: DefinedTermSet
    has defined term: depth
    has defined term: sediment
    has defined term: rock
    has defined term: Length
variable measured: Potassium
  type: PropertyValue
  unit text: %
  subject of: DefinedTermSet
    has defined term: potassium
      type: DefinedTerm
      alternate name: K
    has defined term: Dimensionless Ratio
variable measured: Uranium
  type: PropertyValue
  unit text: mg/kg
  subject of: DefinedTermSet
    has defined term: uranium
variable measured: Thorium
  type: PropertyValue
  unit text: mg/kg
  subject of: DefinedTermSet
    has defined term: thorium
variable measured: Natural gamma ray
  type: PropertyValue
  unit text: API units
  description: gAPI
keywords: borehole logging; SGR
license: https://creativecommons.org/licenses/by/4.0/
conditions of access: unrestricted
is accessible for free: true
language: en
distribution: data matrix.tab
distribution: FileObject
  type: DataDownload
  encoding format: text/html

Tim Freudenthal
type: Person
family name: Freudenthal
given name: Tim

depth
type: DefinedTerm

Length
type: DefinedTerm
alternate name: L

Dimensionless Ratio
type: DefinedTerm
alternate name: ψ

thorium
type: DefinedTerm

data matrix.tab
type: FileObject
type: DataDownload
encoding format: text/tab-separated-values