FR2288317A1 - Aerial prospecting for underground mineral layers - compares electromagnetic waveforms received from different layers with reference waveforms - Google Patents
Aerial prospecting for underground mineral layers - compares electromagnetic waveforms received from different layers with reference waveformsInfo
- Publication number
- FR2288317A1 FR2288317A1 FR7434451A FR7434451A FR2288317A1 FR 2288317 A1 FR2288317 A1 FR 2288317A1 FR 7434451 A FR7434451 A FR 7434451A FR 7434451 A FR7434451 A FR 7434451A FR 2288317 A1 FR2288317 A1 FR 2288317A1
- Authority
- FR
- France
- Prior art keywords
- field
- primary
- waveforms
- layers
- reference waveforms
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/15—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat
- G01V3/165—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat operating with magnetic or electric fields produced or modified by the object or by the detecting device
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A primary electro magnetic field is created and directed to the zone to be prospected. The field has a waveform varying with time, and its phase and frequency components are known and are sufficient to identify the conducting mass present in the zone, these induced current set up the formation of secondary electromagnetic fields which interact with the primary field. The received signals comprise a first part whose phase and amplitude depend upon each frequency component of the secondary magnetic field and a second part which is attributable to the direct coupling with the primary electromagnetic field. Several reference waveforms are coupled in a predetermined manner to the primary field and relate to characteristic electrical responses of several different types of conducting masses. The electromagnetic signals received are compared with the reference waveforms which give optimal correlation.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7434451A FR2288317A1 (en) | 1974-10-14 | 1974-10-14 | Aerial prospecting for underground mineral layers - compares electromagnetic waveforms received from different layers with reference waveforms |
BE149542A BE821083A (en) | 1974-10-14 | 1974-10-15 | CONDUCTIVE MASS DETECTION AND GEOLOGICAL PROSPECTION PROCESS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7434451A FR2288317A1 (en) | 1974-10-14 | 1974-10-14 | Aerial prospecting for underground mineral layers - compares electromagnetic waveforms received from different layers with reference waveforms |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2288317A1 true FR2288317A1 (en) | 1976-05-14 |
FR2288317B1 FR2288317B1 (en) | 1978-09-29 |
Family
ID=9144055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7434451A Granted FR2288317A1 (en) | 1974-10-14 | 1974-10-14 | Aerial prospecting for underground mineral layers - compares electromagnetic waveforms received from different layers with reference waveforms |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE821083A (en) |
FR (1) | FR2288317A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2503874A1 (en) * | 1981-04-14 | 1982-10-15 | Shell Int Research | TRANSMITTER FOR AN ELECTROMAGNETIC PROSPECTING SYSTEM |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2955250A (en) * | 1955-03-28 | 1960-10-04 | Int Nickel Co | Electromagnetic prospecting |
-
1974
- 1974-10-14 FR FR7434451A patent/FR2288317A1/en active Granted
- 1974-10-15 BE BE149542A patent/BE821083A/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2955250A (en) * | 1955-03-28 | 1960-10-04 | Int Nickel Co | Electromagnetic prospecting |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2503874A1 (en) * | 1981-04-14 | 1982-10-15 | Shell Int Research | TRANSMITTER FOR AN ELECTROMAGNETIC PROSPECTING SYSTEM |
Also Published As
Publication number | Publication date |
---|---|
FR2288317B1 (en) | 1978-09-29 |
BE821083A (en) | 1975-02-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |