Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Two topics in electromagnetic radiation field prospecting
Luleå tekniska universitet.
1978 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Different kinds of electrical methods have been used for a considerable time in the field of Applied Geophysics. In common these methods have almost exclusively been based on stationary or slow-varying electromagnetic fields. With a slow-varying field is meant a field whose wavelength is much larger than the characteristic dimensions of the body under study. That is, the field may be regarded as homogeneous in volumes of interest. In practice, a field with a frequency below let say 50 kHz may be regarded as slow~ varying. A certain class of electromagnetic fields is of the radiating type. In this case a considerable part of the electromagnetic energy will leave the near-zone of the transmitting antenna, and propagate as electromagnetic waves. In this dissertation, the author presents some of his research connected to electromagnetic radiation field prospecting carried out at the GeoPhysics Laboratory at Boliden Metall AB. In part 1 "Geophysical prospecting by radar" the possibilities in using HF, VHF and UHF frequencies are studied. These frequencies are found at the extreme high end of the electromagnetic spectrum, from a geophysical point of view. A particular interest is paid to the pulse-radar principle. In part 2 "New instrumentation for VLF radiation field prospecting" the technical details of the prospecting systems VLF-72/73 and WIMP-30 are presented. These systems utilize radiation fields at the extreme low end of the electromagnetic spectrum, in order to measure the apparent resistivity of the ground.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 1978. , 101 p.
Series
Doctoral thesis / Luleå University of Technologyy… → 31 dec 1996, ISSN 0348-8373 ; 03D
National Category
Geology
Research subject
Ore Geology
Identifiers
URN: urn:nbn:se:ltu:diva-26200Local ID: d25c2f00-f99d-11db-b2dd-000ea68e967bOAI: oai:DiVA.org:ltu-26200DiVA: diva2:999360
Note

Godkänd; 1978; 20070503 (ysko)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2016-10-20Bibliographically approved

Open Access in DiVA

No full text

Geology

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 70 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf