| Reference Type | Journal (article/letter/editorial) |
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| Title | Distinguishing buried alluvium from till by using detailed total-magnetic-field data |
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| Journal | Canadian Journal of Earth Sciences |
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| Authors | Schwarz, Erik J. | Author |
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| Year | 1990 (April 1) | Volume | 27 |
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| Issue | 4 |
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| Publisher | Canadian Science Publishing |
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| DOI | doi:10.1139/e90-047Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 480857 | Long-form Identifier | mindat:1:5:480857:6 |
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| GUID | 0 |
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| Full Reference | Schwarz, Erik J. (1990) Distinguishing buried alluvium from till by using detailed total-magnetic-field data. Canadian Journal of Earth Sciences, 27 (4) 513-519 doi:10.1139/e90-047 |
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| Plain Text | Schwarz, Erik J. (1990) Distinguishing buried alluvium from till by using detailed total-magnetic-field data. Canadian Journal of Earth Sciences, 27 (4) 513-519 doi:10.1139/e90-047 |
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| In | (1990, April) Canadian Journal of Earth Sciences Vol. 27 (4) Canadian Science Publishing |
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| Abstract/Notes | Total-magnetic-field and vertical-magnetic-gradient profiles are characteristically different over alluvial and glacial sediments. Positive magnetic anomalies elongated in the river-valley direction but not in the structural trend of the underlying bedrock indicate the occurrence of magnetite enrichments within the alluvium. No evidence for such anomalies is found in survey data obtained in gravel pits located in tills. The logarithm of the power of the total-field profiles over the river terraces plotted against spatial frequency is structured, which is indicative of the presence of magnetic sources of certain depth and width. However, the power spectra over till may also show similar features if high-frequency bedrock anomalies are present in the data, so these spectra are not a reliable means of distinguishing between buried alluvium and till. The results show that magnetic analysis allows the discrimination between buried tills and alluvium in which magnetite concentrations of considerable lateral extent were formed. |
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