| dbo:abstract |
Induced polarization (IP) is a geophysical imaging technique used to identify the electrical chargeability of subsurface materials, such as ore. The polarization effect was originally discovered by Conrad Schlumberger when measuring the resistivity of rock. The survey method is similar to electrical resistivity tomography (ERT), in that an electric current is transmitted into the subsurface through two electrodes, and voltage is monitored through two other electrodes. Induced polarization is a geophysical method used extensively in mineral exploration and mine operations. Resistivity and IP methods are often applied on the ground surface using multiple four-electrode sites. In an IP survey, in addition to resistivity measurement, capacitive properties of the subsurface materials are determined as well. As a result, IP surveys provide additional information about the spatial variation in lithology and grain-surface chemistry. The IP survey can be made in time-domain and frequency-domain mode: In the method, the voltage response is observed as a function of time after the injected current is switched off or on. In the mode, an alternating current is injected into the ground with variable frequencies. Voltage phase-shifts are measured to evaluate the impedance spectrum at different injection frequencies, which is commonly referred to as spectral IP. The IP method is one of the most widely used techniques in mineral exploration and mining industry and it has other applications in hydrogeophysical surveys, environmental investigations and geotechnical engineering projects. (en) Metode polarisasi terimbas atau polarisasi terinduksi merupakan metode geofisika aktif. Metode ini merupakan pengembangan dari metode geolistrik pemetaan (resistivitas). Pada metode polarisasi terimbas, arus listrik dinjeksikan melalui elektrode arus pada selang waktu tertentu kemudian dihentikan. Ketika sumber arus dihentikan voltmeter yang berada pada elektrode potensial tidak langsung menunjuk nol namun turun secara perlahan-lahan. Gejala ini disebut sebagai efek polarisasi terimbas. Efek polarisasi terimbas inilah yang menjadi elemen dasar pada metode IP. Efek polarisasi terimbas bisa terjadi karena tanah atau batuan memiliki unsur kapasitif yaitu kemampuan suatu medium untuk menyimpan muatan listrik ketika diberi arus listrik. Efek polarisasi ini menyebabkan timbulnya potensial ekstra yang disebut over voltage. Nilai over voltage akan semakin besar apabila frekuensi arus yang diinjeksikan rendah atau mendekati arus searah. Ketika arus yang diinjeksikan berhenti maka potensial polarisasi akan terdeteksi dan akan turun secara perlahan disebut decay potential. Decay potential merupakan indikator besarnya polarisasi. Apabila potensial ini direkam dan dihitung harga integralnya maka besaran yang dihitung dinamakan chargeability (M). Semakin besar nilai polarisasi maka nilai chargeabilitynya juga semakin besar. Metode ini sering digunakan dalam pertambangan terutama eksplorasi logam mulia seperti emas dan perak. (in) Мéтод вы́званной поляриза́ции (ВП) — метод электроразведки, основанный на изучении возникающих вторичных токов и поляризации в телах под действием первичного электрического и магнитного полей. Используется в основном для поиска вкрапленных руд и подземных вод. (ru) |
| dbo:thumbnail |
wiki-commons:Special:FilePath/Theoretical_current_w...arization_measurements..png?width=300 |
| dbo:wikiPageExternalLink |
http://www.l-gm.de/English/Resistivity_Meters/resistivity_meters.html |
| dbo:wikiPageID |
11715513 (xsd:integer) |
| dbo:wikiPageLength |
6658 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID |
1066035942 (xsd:integer) |
| dbo:wikiPageWikiLink |
dbr:Electric_current dbr:Electrical_resistivity_measurement_of_concrete dbr:Electrical_resistivity_tomography dbr:Electrode dbr:Voltage dbr:Geophysical_imaging dbr:Ore dbr:DC_impedance_spectroscopy dbr:Alternating_current dbr:Four-terminal_sensing dbr:AC_impedance_spectroscopy dbc:Geophysical_imaging dbr:Cole–Cole_equation dbr:Integral dbr:Spectral_IP dbr:Frequency-domain dbr:Blackwell_Science dbr:Resistivity dbr:Conrad_Schlumberger dbr:Time-domain dbr:Apparent_resistivity dbr:File:Theoretical_current_waveform_and_...nduced_polarization_measurements..png |
| dbp:cs1Dates |
y (en) |
| dbp:date |
January 2022 (en) |
| dbp:wikiPageUsesTemplate |
dbt:Anchor dbt:Cite_book dbt:Main dbt:Reflist dbt:Use_dmy_dates dbt:Use_list-defined_references dbt:Geophysics-stub |
| dct:subject |
dbc:Geophysical_imaging |
| gold:hypernym |
dbr:Technique |
| rdf:type |
dbo:TopicalConcept |
| rdfs:comment |
Мéтод вы́званной поляриза́ции (ВП) — метод электроразведки, основанный на изучении возникающих вторичных токов и поляризации в телах под действием первичного электрического и магнитного полей. Используется в основном для поиска вкрапленных руд и подземных вод. (ru) Induced polarization (IP) is a geophysical imaging technique used to identify the electrical chargeability of subsurface materials, such as ore. The polarization effect was originally discovered by Conrad Schlumberger when measuring the resistivity of rock. The survey method is similar to electrical resistivity tomography (ERT), in that an electric current is transmitted into the subsurface through two electrodes, and voltage is monitored through two other electrodes. The IP survey can be made in time-domain and frequency-domain mode: (en) Metode polarisasi terimbas atau polarisasi terinduksi merupakan metode geofisika aktif. Metode ini merupakan pengembangan dari metode geolistrik pemetaan (resistivitas). Pada metode polarisasi terimbas, arus listrik dinjeksikan melalui elektrode arus pada selang waktu tertentu kemudian dihentikan. Ketika sumber arus dihentikan voltmeter yang berada pada elektrode potensial tidak langsung menunjuk nol namun turun secara perlahan-lahan. Gejala ini disebut sebagai efek polarisasi terimbas. Efek polarisasi terimbas inilah yang menjadi elemen dasar pada metode IP. Efek polarisasi terimbas bisa terjadi karena tanah atau batuan memiliki unsur kapasitif yaitu kemampuan suatu medium untuk menyimpan muatan listrik ketika diberi arus listrik. (in) |
| rdfs:label |
Polarisasi terimbas (in) Induced polarization (en) Метод вызванной поляризации (ru) |
| owl:sameAs |
freebase:Induced polarization wikidata:Induced polarization dbpedia-id:Induced polarization dbpedia-ru:Induced polarization dbpedia-vi:Induced polarization https://global.dbpedia.org/id/3tp4e |
| prov:wasDerivedFrom |
wikipedia-en:Induced_polarization?oldid=1066035942&ns=0 |
| foaf:depiction |
wiki-commons:Special:FilePath/Theoretical_current_w...nduced_polarization_measurements..png |
| foaf:isPrimaryTopicOf |
wikipedia-en:Induced_polarization |
| is dbo:wikiPageDisambiguates of |
dbr:IP |
| is dbo:wikiPageRedirects of |
dbr:Frequency-domain_IP dbr:Frequency-domain_induced_polarisation dbr:Frequency-domain_induced_polarization dbr:Frequency_domain_IP dbr:Frequency_domain_induced_polarisation dbr:Frequency_domain_induced_polarization dbr:IP_measurement dbr:IP_method dbr:Time-domain_IP dbr:Time-domain_induced_polarisation dbr:Time-domain_induced_polarization dbr:Time_domain_IP dbr:Time_domain_induced_polarisation dbr:Time_domain_induced_polarization dbr:Induced_Polarisation dbr:Induced_Polarization dbr:Induced_polarisation |
| is dbo:wikiPageWikiLink of |
dbr:Electrical_resistivity_measurement_of_concrete dbr:Electrostatic_induction dbr:Geophysical_imaging dbr:Geophysical_survey dbr:Emigma dbr:Geophysics dbr:Dielectric_spectroscopy dbr:Frequency-domain_IP dbr:Frequency-domain_induced_polarisation dbr:Frequency-domain_induced_polarization dbr:Frequency_domain_IP dbr:Frequency_domain_induced_polarisation dbr:Frequency_domain_induced_polarization dbr:Jeffrey_C._Wynn dbr:Keith_Henson dbr:IP_measurement dbr:IP_method dbr:Time-domain_IP dbr:Time-domain_induced_polarisation dbr:Time-domain_induced_polarization dbr:Time_domain_IP dbr:Time_domain_induced_polarisation dbr:Time_domain_induced_polarization dbr:Seismology dbr:IP dbr:Spectral_induced_polarisation dbr:Induced_Polarisation dbr:Induced_Polarization dbr:Near-surface_geophysics dbr:Exploration_geophysics dbr:Redox_gradient dbr:Seismo-electromagnetics dbr:Outline_of_geophysics dbr:Induced_polarisation |
| is foaf:primaryTopic of |
wikipedia-en:Induced_polarization |
