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Record Nr. |
UNINA9910694423703321 |
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Autore |
Lucius Jeffrey E |
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Titolo |
An introduction to using surface geophysics to characterize sand and gravel deposits [[electronic resource] /] / by Jeffrey E. Lucius, William H. Langer, and Karl J. Ellefsen |
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Pubbl/distr/stampa |
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Reston, Va. : , : U.S. Geological Survey, , 2007 |
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Descrizione fisica |
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iv, 33 pages : digital, PDF file |
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Collana |
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Altri autori (Persone) |
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LangerWilliam H |
EllefsenKarl |
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Soggetti |
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Prospecting - Geophysical methods |
Sand and gravel mines and mining |
Sand |
Aggregates (Building materials) |
Gravel |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Title from Web page (viewed on Sept. 28, 2007). |
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Nota di bibliografia |
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Includes bibliographical references (pages 25-26). |
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Sommario/riassunto |
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This report is an introduction to surface geophysical techniques that aggregate producers can use to characterize known deposits of sand and gravel. Five well-established and well-tested geophysical methods are presented: seismic refraction and reflection, resistivity, ground penetrating radar, time-domain electromagnetism, and frequency-domain electromagnetism. Depending on site conditions and the selected method(s), geophysical surveys can provide information concerning areal extent and thickness of the deposit, thickness of overburden, depth to the water table, critical geologic contacts, and location and correlation of geologic features. In addition, geophysical surveys can be conducted prior to intensive drilling to help locate auger or drill holes, reduce the number of drill holes required, calculate stripping ratios to help manage mining costs, and provide continuity between sampling sites to upgrade the confidence of reserve calculations from probable reserves to proved reserves. Perhaps the greatest value of geophysics to aggregate producers may be the speed |
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of data acquisition, reduced overall costs, and improved subsurface characterization. |
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