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Interpretation of aeromagnetic data of Idah area in north central Nigeria using combined methods.

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Title: Interpretation of aeromagnetic data of Idah area in north central Nigeria using combined methods.
Authors: Obiora, Daniel1 daniel.obiora@unn.edu.ng, Yakubu, John1, Okeke, Francisca1, Chukudebelu, Josiah1, Oha, Andrew2
Source: Journal of the Geological Society of India. Jul2016, Vol. 88 Issue 1, p98-106. 9p.
Subject Terms: *Geomagnetic maps, *Magnetic anomalies, *Igneous rocks, *Magnetic field effects, *Gravitational effects
Geographic Terms: Idah (Nigeria)
Abstract: Aeromagnetic data of Idah area (sheet 267), north-central Nigeria, has been interpreted by applying source parameter imaging (SPI), Euler deconvolution and forward and inverse modeling methods. Quantitatively, depth estimates obtained by employing SPI have shown minimum to maximum depth to anomalous source at 57.591m to 664.841m. Applying Euler deconvolution for various structural indices (SI), the depth obtained for SI=1, ranges from 5.6m to 197.6m, 22.0m to 204.7m for SI=2 and for SI=3, the depth to magnetic source obtained ranges from 38.0m to 205.5m. The results from forward and inverse modeling for profiles 1, 2, 3, 4 and 5 indicate depths of 95.6m, 103.9m, 477.5m, 1239.8m and 76.8m respectively. From the results of susceptibility values; the result obtained from profile 1 with susceptibility value of -0.0175 suggests that the body is associated with non-magnetic sedimentary deposits. Profile 2 with a susceptibility value of 0.07 is typical of basic igneous rock; gabbro and basalts. The results for profiles 3, 4 and 5 having susceptibility values of 0.01 to 0.013 are typical of intermediate igneous rocks; diorite and andesite. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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An: 116774382
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Interpretation of aeromagnetic data of Idah area in north central Nigeria using combined methods.
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  Data: <searchLink fieldCode="AR" term="%22Obiora%2C+Daniel%22">Obiora, Daniel</searchLink><relatesTo>1</relatesTo><i> daniel.obiora@unn.edu.ng</i><br /><searchLink fieldCode="AR" term="%22Yakubu%2C+John%22">Yakubu, John</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Okeke%2C+Francisca%22">Okeke, Francisca</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Chukudebelu%2C+Josiah%22">Chukudebelu, Josiah</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Oha%2C+Andrew%22">Oha, Andrew</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+Geological+Society+of+India%22">Journal of the Geological Society of India</searchLink>. Jul2016, Vol. 88 Issue 1, p98-106. 9p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Geomagnetic+maps%22">Geomagnetic maps</searchLink><br />*<searchLink fieldCode="DE" term="%22Magnetic+anomalies%22">Magnetic anomalies</searchLink><br />*<searchLink fieldCode="DE" term="%22Igneous+rocks%22">Igneous rocks</searchLink><br />*<searchLink fieldCode="DE" term="%22Magnetic+field+effects%22">Magnetic field effects</searchLink><br />*<searchLink fieldCode="DE" term="%22Gravitational+effects%22">Gravitational effects</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Idah+%28Nigeria%29%22">Idah (Nigeria)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Aeromagnetic data of Idah area (sheet 267), north-central Nigeria, has been interpreted by applying source parameter imaging (SPI), Euler deconvolution and forward and inverse modeling methods. Quantitatively, depth estimates obtained by employing SPI have shown minimum to maximum depth to anomalous source at 57.591m to 664.841m. Applying Euler deconvolution for various structural indices (SI), the depth obtained for SI=1, ranges from 5.6m to 197.6m, 22.0m to 204.7m for SI=2 and for SI=3, the depth to magnetic source obtained ranges from 38.0m to 205.5m. The results from forward and inverse modeling for profiles 1, 2, 3, 4 and 5 indicate depths of 95.6m, 103.9m, 477.5m, 1239.8m and 76.8m respectively. From the results of susceptibility values; the result obtained from profile 1 with susceptibility value of -0.0175 suggests that the body is associated with non-magnetic sedimentary deposits. Profile 2 with a susceptibility value of 0.07 is typical of basic igneous rock; gabbro and basalts. The results for profiles 3, 4 and 5 having susceptibility values of 0.01 to 0.013 are typical of intermediate igneous rocks; diorite and andesite. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=116774382
RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1007/s12594-016-0462-1
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 9
        StartPage: 98
    Subjects:
      – SubjectFull: Geomagnetic maps
        Type: general
      – SubjectFull: Magnetic anomalies
        Type: general
      – SubjectFull: Igneous rocks
        Type: general
      – SubjectFull: Magnetic field effects
        Type: general
      – SubjectFull: Gravitational effects
        Type: general
      – SubjectFull: Idah (Nigeria)
        Type: general
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      – TitleFull: Interpretation of aeromagnetic data of Idah area in north central Nigeria using combined methods.
        Type: main
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            NameFull: Obiora, Daniel
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            NameFull: Yakubu, John
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            NameFull: Okeke, Francisca
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            NameFull: Chukudebelu, Josiah
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            NameFull: Oha, Andrew
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            – D: 01
              M: 07
              Text: Jul2016
              Type: published
              Y: 2016
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              Value: 00167622
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              Value: 88
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            – TitleFull: Journal of the Geological Society of India
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