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 waveforms

Info

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
Application number
FR7434451A
Other languages
French (fr)
Other versions
FR2288317B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smiths Detection Toronto Ltd
Original Assignee
Barringer Research Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Barringer Research Ltd filed Critical Barringer Research Ltd
Priority to FR7434451A priority Critical patent/FR2288317A1/en
Priority to BE149542A priority patent/BE821083A/en
Publication of FR2288317A1 publication Critical patent/FR2288317A1/en
Application granted granted Critical
Publication of FR2288317B1 publication Critical patent/FR2288317B1/fr
Granted legal-status Critical Current

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.
FR7434451A 1974-10-14 1974-10-14 Aerial prospecting for underground mineral layers - compares electromagnetic waveforms received from different layers with reference waveforms Granted FR2288317A1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955250A (en) * 1955-03-28 1960-10-04 Int Nickel Co Electromagnetic prospecting

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955250A (en) * 1955-03-28 1960-10-04 Int Nickel Co Electromagnetic prospecting

Cited By (1)

* Cited by examiner, † Cited by third party
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