A GYRO-ORIENTED 3-COMPONENT BOREHOLE MAGNETOMETER FOR MINERAL PROSPECTING, WITH EXAMPLES OF ITS APPLICATION
A triple axis borehole magnetometer is described that consists of a Foerster-probe (fluxgate) triplet (sensitivity 1 nT), a Foerster-probe gradiometer (sensitivity 2 nT/40 cm), a gyro unit (mean angular drift approx 0.5/sup 0//h) which is equipped with accelerometers (sensitivity 1/100/sup 0/), and...
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| Veröffentlicht in: | Geophys. Prospect.; (United States) 1988-11, Vol.36 (8), p.933-961 |
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| container_title | Geophys. Prospect.; (United States) |
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| creator | BOSUM, W. EBERLE, D. REHLI, H.-J. |
| description | A triple axis borehole magnetometer is described that consists of a Foerster-probe (fluxgate) triplet (sensitivity 1 nT), a Foerster-probe gradiometer (sensitivity 2 nT/40 cm), a gyro unit (mean angular drift approx 0.5/sup 0//h) which is equipped with accelerometers (sensitivity 1/100/sup 0/), and a data transmission unit (with multiplexer and 16-bit AD converter). The sensitive fluxgate-magnetometer can detect weakly magnetic or small source bodies. Data from the gyro and the accelerometers allow the 3-component magnetic field values to be transformed to north, east and vertical components. Since they do not rely on magnetically-determined directional data, the results are not disturbed by local anomalies of the magnetic declination. Furthermore, the magnetometer can also be used in vertical boreholes. 3-component measurements are carried out at discrete points in the neighbourhood of a source body to locate its position, and within the source body to determine the direction of magnetization. The strength of magnetization and information on magnetic classification are obtained by continuous measurement of one or more components within the source body. Calculation algorithms and computer programs are available to simplify data processing and interpretation. Survey examples are discussed. |
| doi_str_mv | 10.1111/j.1365-2478.1988.tb02201.x |
| format | Article |
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The sensitive fluxgate-magnetometer can detect weakly magnetic or small source bodies. Data from the gyro and the accelerometers allow the 3-component magnetic field values to be transformed to north, east and vertical components. Since they do not rely on magnetically-determined directional data, the results are not disturbed by local anomalies of the magnetic declination. Furthermore, the magnetometer can also be used in vertical boreholes. 3-component measurements are carried out at discrete points in the neighbourhood of a source body to locate its position, and within the source body to determine the direction of magnetization. The strength of magnetization and information on magnetic classification are obtained by continuous measurement of one or more components within the source body. Calculation algorithms and computer programs are available to simplify data processing and interpretation. Survey examples are discussed.</description><identifier>ISSN: 0016-8025</identifier><identifier>EISSN: 1365-2478</identifier><identifier>DOI: 10.1111/j.1365-2478.1988.tb02201.x</identifier><identifier>CODEN: GPPRAR</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>02 PETROLEUM ; 020200 - Petroleum- Reserves, Geology, & Exploration ; 03 NATURAL GAS ; 030200 - Natural Gas- Reserves, Geology, & Exploration ; ALGORITHMS ; ANALOG-TO-DIGITAL CONVERTERS ; Applied geophysics ; BOREHOLES ; CAVITIES ; COMPUTER CODES ; DATA ANALYSIS ; DATA TRANSMISSION SYSTEMS ; Earth sciences ; Earth, ocean, space ; ELECTRICAL SURVEYS ; ELECTROMAGNETIC SURVEYS ; ELECTRONIC EQUIPMENT ; Exact sciences and technology ; EXPLORATION ; GEOPHYSICAL SURVEYS ; Internal geophysics ; MAGNETIC FIELDS ; MAGNETOMETERS ; MAGNETOTELLURIC SURVEYS ; MATHEMATICAL LOGIC ; MEASURING INSTRUMENTS ; Metal geology ; Metallic and non-metallic deposits ; MINERALS ; SURVEYS ; TECHNOLOGY ASSESSMENT ; THREE-DIMENSIONAL CALCULATIONS</subject><ispartof>Geophys. Prospect.; (United States), 1988-11, Vol.36 (8), p.933-961</ispartof><rights>1989 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>309,310,314,776,780,785,786,881,23909,23910,25118,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=7304783$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/6060410$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>BOSUM, W.</creatorcontrib><creatorcontrib>EBERLE, D.</creatorcontrib><creatorcontrib>REHLI, H.-J.</creatorcontrib><creatorcontrib>Bundesanstalt fur Geowissenschaften und Rohstoffe (BGR), Hannover (DE)</creatorcontrib><title>A GYRO-ORIENTED 3-COMPONENT BOREHOLE MAGNETOMETER FOR MINERAL PROSPECTING, WITH EXAMPLES OF ITS APPLICATION</title><title>Geophys. Prospect.; (United States)</title><description>A triple axis borehole magnetometer is described that consists of a Foerster-probe (fluxgate) triplet (sensitivity 1 nT), a Foerster-probe gradiometer (sensitivity 2 nT/40 cm), a gyro unit (mean angular drift approx 0.5/sup 0//h) which is equipped with accelerometers (sensitivity 1/100/sup 0/), and a data transmission unit (with multiplexer and 16-bit AD converter). The sensitive fluxgate-magnetometer can detect weakly magnetic or small source bodies. Data from the gyro and the accelerometers allow the 3-component magnetic field values to be transformed to north, east and vertical components. Since they do not rely on magnetically-determined directional data, the results are not disturbed by local anomalies of the magnetic declination. Furthermore, the magnetometer can also be used in vertical boreholes. 3-component measurements are carried out at discrete points in the neighbourhood of a source body to locate its position, and within the source body to determine the direction of magnetization. The strength of magnetization and information on magnetic classification are obtained by continuous measurement of one or more components within the source body. Calculation algorithms and computer programs are available to simplify data processing and interpretation. Survey examples are discussed.</description><subject>02 PETROLEUM</subject><subject>020200 - Petroleum- Reserves, Geology, & Exploration</subject><subject>03 NATURAL GAS</subject><subject>030200 - Natural Gas- Reserves, Geology, & Exploration</subject><subject>ALGORITHMS</subject><subject>ANALOG-TO-DIGITAL CONVERTERS</subject><subject>Applied geophysics</subject><subject>BOREHOLES</subject><subject>CAVITIES</subject><subject>COMPUTER CODES</subject><subject>DATA ANALYSIS</subject><subject>DATA TRANSMISSION SYSTEMS</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>ELECTRICAL SURVEYS</subject><subject>ELECTROMAGNETIC SURVEYS</subject><subject>ELECTRONIC EQUIPMENT</subject><subject>Exact sciences and technology</subject><subject>EXPLORATION</subject><subject>GEOPHYSICAL SURVEYS</subject><subject>Internal geophysics</subject><subject>MAGNETIC FIELDS</subject><subject>MAGNETOMETERS</subject><subject>MAGNETOTELLURIC SURVEYS</subject><subject>MATHEMATICAL LOGIC</subject><subject>MEASURING INSTRUMENTS</subject><subject>Metal geology</subject><subject>Metallic and non-metallic deposits</subject><subject>MINERALS</subject><subject>SURVEYS</subject><subject>TECHNOLOGY ASSESSMENT</subject><subject>THREE-DIMENSIONAL CALCULATIONS</subject><issn>0016-8025</issn><issn>1365-2478</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1988</creationdate><recordtype>article</recordtype><recordid>eNo9kF9PgzAUxRujiXP6HZrFR8H-oRQeETuGAcoYZvpEulIim24L8DC_vSQzuy83N-eXm3MOADOMbDzO89bG1GUWcbhnY9_z7GGDCEHYPl2ByUW6BhOEsGt5iLBbcNf3W4QoYsyZgF0Ao89CWrKIRVaKV0itUKa5zMYLvshCLGQiYBpEmShlKkpRwLksYBpnoggSmBdylYuwjLPoCa7jcgHFR5DmiVhBOYdxuYJBnidxGJSxzO7BTaO-e_Pwv6fgfS7KcGElMhqRxGpHs4OF1aZmjBrk-hTXrG44ZoYrY2rCHY9pphria0P5GKJuXKKRrxrPaXzFNfFoTadgdv576Ie26nU7GP2lD_u90UPlIhc5GI3Q4xk6ql6r76ZTe9321bFrf1T3W3GKxuLoiFlnrO0Hc7rIqttVLqecVessqvL10ifLcF290T9Ehm9K</recordid><startdate>19881101</startdate><enddate>19881101</enddate><creator>BOSUM, W.</creator><creator>EBERLE, D.</creator><creator>REHLI, H.-J.</creator><general>Blackwell Publishing Ltd</general><general>Blackwell</general><scope>BSCLL</scope><scope>IQODW</scope><scope>OTOTI</scope></search><sort><creationdate>19881101</creationdate><title>A GYRO-ORIENTED 3-COMPONENT BOREHOLE MAGNETOMETER FOR MINERAL PROSPECTING, WITH EXAMPLES OF ITS APPLICATION</title><author>BOSUM, W. ; EBERLE, D. ; REHLI, H.-J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i247t-1abd553e06931d5df715e7aeed27485c5af29ce37003df62c09af84f9a7c283d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1988</creationdate><topic>02 PETROLEUM</topic><topic>020200 - Petroleum- Reserves, Geology, & Exploration</topic><topic>03 NATURAL GAS</topic><topic>030200 - Natural Gas- Reserves, Geology, & Exploration</topic><topic>ALGORITHMS</topic><topic>ANALOG-TO-DIGITAL CONVERTERS</topic><topic>Applied geophysics</topic><topic>BOREHOLES</topic><topic>CAVITIES</topic><topic>COMPUTER CODES</topic><topic>DATA ANALYSIS</topic><topic>DATA TRANSMISSION SYSTEMS</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>ELECTRICAL SURVEYS</topic><topic>ELECTROMAGNETIC SURVEYS</topic><topic>ELECTRONIC EQUIPMENT</topic><topic>Exact sciences and technology</topic><topic>EXPLORATION</topic><topic>GEOPHYSICAL SURVEYS</topic><topic>Internal geophysics</topic><topic>MAGNETIC FIELDS</topic><topic>MAGNETOMETERS</topic><topic>MAGNETOTELLURIC SURVEYS</topic><topic>MATHEMATICAL LOGIC</topic><topic>MEASURING INSTRUMENTS</topic><topic>Metal geology</topic><topic>Metallic and non-metallic deposits</topic><topic>MINERALS</topic><topic>SURVEYS</topic><topic>TECHNOLOGY ASSESSMENT</topic><topic>THREE-DIMENSIONAL CALCULATIONS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>BOSUM, W.</creatorcontrib><creatorcontrib>EBERLE, D.</creatorcontrib><creatorcontrib>REHLI, H.-J.</creatorcontrib><creatorcontrib>Bundesanstalt fur Geowissenschaften und Rohstoffe (BGR), Hannover (DE)</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>OSTI.GOV</collection><jtitle>Geophys. Prospect.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>BOSUM, W.</au><au>EBERLE, D.</au><au>REHLI, H.-J.</au><aucorp>Bundesanstalt fur Geowissenschaften und Rohstoffe (BGR), Hannover (DE)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A GYRO-ORIENTED 3-COMPONENT BOREHOLE MAGNETOMETER FOR MINERAL PROSPECTING, WITH EXAMPLES OF ITS APPLICATION</atitle><jtitle>Geophys. Prospect.; (United States)</jtitle><date>1988-11-01</date><risdate>1988</risdate><volume>36</volume><issue>8</issue><spage>933</spage><epage>961</epage><pages>933-961</pages><issn>0016-8025</issn><eissn>1365-2478</eissn><coden>GPPRAR</coden><abstract>A triple axis borehole magnetometer is described that consists of a Foerster-probe (fluxgate) triplet (sensitivity 1 nT), a Foerster-probe gradiometer (sensitivity 2 nT/40 cm), a gyro unit (mean angular drift approx 0.5/sup 0//h) which is equipped with accelerometers (sensitivity 1/100/sup 0/), and a data transmission unit (with multiplexer and 16-bit AD converter). The sensitive fluxgate-magnetometer can detect weakly magnetic or small source bodies. Data from the gyro and the accelerometers allow the 3-component magnetic field values to be transformed to north, east and vertical components. Since they do not rely on magnetically-determined directional data, the results are not disturbed by local anomalies of the magnetic declination. Furthermore, the magnetometer can also be used in vertical boreholes. 3-component measurements are carried out at discrete points in the neighbourhood of a source body to locate its position, and within the source body to determine the direction of magnetization. The strength of magnetization and information on magnetic classification are obtained by continuous measurement of one or more components within the source body. Calculation algorithms and computer programs are available to simplify data processing and interpretation. Survey examples are discussed.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/j.1365-2478.1988.tb02201.x</doi><tpages>29</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0016-8025 |
| ispartof | Geophys. Prospect.; (United States), 1988-11, Vol.36 (8), p.933-961 |
| issn | 0016-8025 1365-2478 |
| language | eng |
| recordid | cdi_pascalfrancis_primary_7304783 |
| source | Wiley Online Library Journals Frontfile Complete |
| subjects | 02 PETROLEUM 020200 - Petroleum- Reserves, Geology, & Exploration 03 NATURAL GAS 030200 - Natural Gas- Reserves, Geology, & Exploration ALGORITHMS ANALOG-TO-DIGITAL CONVERTERS Applied geophysics BOREHOLES CAVITIES COMPUTER CODES DATA ANALYSIS DATA TRANSMISSION SYSTEMS Earth sciences Earth, ocean, space ELECTRICAL SURVEYS ELECTROMAGNETIC SURVEYS ELECTRONIC EQUIPMENT Exact sciences and technology EXPLORATION GEOPHYSICAL SURVEYS Internal geophysics MAGNETIC FIELDS MAGNETOMETERS MAGNETOTELLURIC SURVEYS MATHEMATICAL LOGIC MEASURING INSTRUMENTS Metal geology Metallic and non-metallic deposits MINERALS SURVEYS TECHNOLOGY ASSESSMENT THREE-DIMENSIONAL CALCULATIONS |
| title | A GYRO-ORIENTED 3-COMPONENT BOREHOLE MAGNETOMETER FOR MINERAL PROSPECTING, WITH EXAMPLES OF ITS APPLICATION |
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