| Aerogeophysical is one of the important means to realize the prospecting quickbreak.In recent years, with the increase of aeromagnetic anomalies, the task of theground check on aeromagnetic anomaly is heavy and urgent.This subject comes fromThe China geological survey&Geological survey projects “Application of Xfluorescence analyzer in the West Tianshan ofaeromagnetic anomaly verification”. useadvantage of The ground high resolution magnetic measurement and ground gammaray spectrometry measurements,not only the instrument is portable，high workefficiency, but also quickly delineated anomalies and evaluation at the scene.Thisarticle mainly from the ground high precision measurement and the gamma rayspectrometry of integration, As the mainresearch, This paper’s main conclusions are asfollows:1Introduced the basic theory of magnetic survey and gamma-rayspectrometry,From the theory research of the magnetic measurement and gamma rayspectrum measurement method integrated technology, in order to provides the basisfor the follow-up tests.2According to gamma ray spectroscopy main measurement rock ore, the soilof gamma rays, and magnetic survey itself doesn’t have the conditions of the releaseradioactive rays,the Interference of magnetometer measurements on the γ energyspectrometer measurement theory does not exist,Therefore, the main study was toinvestigate the interference of the γ spectrometer magnetometer measurements:(1) Magnetometer probe in different directions on the test, indicating that in thenormal field or exception is not a lot of time (a500nT less than), the protonmagnetometer probe toward the direction of the outliers changes will not greatly change mean2nT aboutnot have a major impact on the observation accuracy.(2) Gamma ray spectroscopy surve internal electronic instrument work toproduce of electromagnetic radiation influence test, work and not the work of the γspectrum measurement results of the magnetometer, difference of only0.1nTnegligible.(3) γ spectrometer magnetometer interference tests in different directions atdifferent distances, the measurement data in a different direction in the3meters-10meters between the statistical fluctuation, indicating that the gamma spectrometerinterference magnetometer. Data change in the volatility of less than2meters,0meters to the maximum with the increase of the energy spectrometer distance near tothe interference of the magnetometer has gradually become larger, and the maximummean measurement at0meters in10meters premises measuring the smallest meandifference range for about21.22-16.20nT the average18.30nT, analyze their causesfrom the γ spectrometer host (magnetic material).(4) The wild profile bound measurement and the interference of fixed-pointmeasurement test, through the gamma ray spectroscopy surve magnetometerapparatus to designated interference and profile interference testing that the gammaray spectroscopy surve apparatus to have fixed magnetometer to the interference ofvalue, the contrast found, in actual measurement of the profile of the gamma rayspectroscopy surve apparatus on the magnetometer interference is greater than themean29.04nT gamma ray spectroscopy surve fixed-point interference experimentinstrument of interference mean17.5nT, two test interference difference, there iserror of11.54nT, and analyzes the error caused by the main reason is the fieldmeasurement, in field measurement personnel in the process of doing profile testgamma ray spectroscopy surve host is the instrument in the body of the people back,and gamma ray spectroscopy surve instrument host and magnetometer to probe thedistance between the smaller, causing the interference value change, in view of theanalysis the reasons for supplements, and concludes that the actual profile of themeasurement of gamma ray spectroscopy surve apparatus on the interference of themean error magnetometer11.32nT, and the error is11.54nT differred only0.22nT,the analysis of the reason is correct,interference and profile test interference value isfixed, namely17.72nT.(5) Bluetooth transfer to the influence of the magnetometer test showed that inthe process of transmission is bluetooth magnetometer interference is existence, butits volatility is not big, mean in2.56nT, far less than the real value of magnetic anomaly.Through the above research shows that, Magnetic system and γ measurementsystem in certain geometrical distribution conditions gamma ray spectroscopy surveapparatus on the magnetometer interference value is fixed,18.01nT or so; Bluetoothtransmission process is the interference is fixed magnetometer,2.56nT or so, If we inthe gamma ray spectroscopy surve instrument making reasonable selection on host,selection of the magnetic materials, such as no magnetic conductive line good copperor brass, so this will greatly reduce interference. And in the software to correct, thisinterference will can be ignored. Namely magnetic force-gamma ray spectrumintegration of instrument research is feasible.3In order to research the magnetic-gamma ray spectroscopy surve instrumentintegration actual field application effect and prospects, in the work area, select2profiles used ground high precision measurement and gamma ray spectroscopy survemagnetic method for measuring instrument, one of through the No.135aeromagneticanomalies point. On measuring data, and make comprehensive analysis, throughcomparing the ground magnetic measurement and gamma ray spectroscopy survemeasuring curve, and with geological background, fast and effective classification ofstrata boundaries, and the aeromagnetic anomalies ground inspection evaluation,preliminary concluded that the No.135aeromagnetic anomalies point was since aburied depth of volcanic rocks caused. |
PDF Full Text Request