Variable IP method mainly measures the Percent Frequency Effect (PFE), and phase IP method mainly measures phase. They both aim at finding IP anomaly. However, only using PFE anomaly or single phase anomaly can′t dis...Variable IP method mainly measures the Percent Frequency Effect (PFE), and phase IP method mainly measures phase. They both aim at finding IP anomaly. However, only using PFE anomaly or single phase anomaly can′t distinguish IP body′s property. The authors put forward a new method——dualfrequency and multiparameter IP method, which can not only find anomaly of PFE and phase, but also provide the property information of IP anomaly resource. The authors also have invented the dualfrequency and multiparameter IP instrument. A lot of experiments and field work have been done. The results show that the instrument is valuable in distinguishing IP anomalies.展开更多
The dual-frequency(DF)IP is a new kind of frequency domain IP method.Not only is thedual-frequency current transmitted simultaneously but the electric potential difference due to dualfrequency current is measured sync...The dual-frequency(DF)IP is a new kind of frequency domain IP method.Not only is thedual-frequency current transmitted simultaneously but the electric potential difference due to dualfrequency current is measured synchronously.This paper discusses the principle and charateristicof DF current, DF current can be formed by two rectangular currents which must be coherent orelse false Percent Frequency Effect(PEE)will occur.DF currents with different waveforms areequivalent in the ability of detecting IP anomalies.Unstable current has much less effect of DFIP than on conventional variable frequency method;in fact,there is no need to stabilize currentin DF IP method.There are many differences between harmonic contents of DF current and thatof rectangular wave used in variable frequency method,but theoretical analysis,labaratory mod-eling and field data all show that the anomalies of both DF and variable frequency method are sim-liar in character and close in value.DF IP can match variable frequeney IP and time domain IPin the ability of detecting IP anomaly,furthermore,dual-frequency IP measurements are morerapid,more accurate and more simple in operation.展开更多
Gold mineralization in the Tanghuping Prospect was the target of the geophysical exploration. The mineralization shows close relation with geological structures and is accompanied by alteration. Sulfide concentrations...Gold mineralization in the Tanghuping Prospect was the target of the geophysical exploration. The mineralization shows close relation with geological structures and is accompanied by alteration. Sulfide concentrations in the altered zones w ere used to trace the mineralization by Induced Polarization(IP) method. Through laboratory and field measurements of some selected samples of the study area,t heir geophysical properties were studied carefully. After that by numerical calc ulation,a geophysical model was built. Six lines were designed to use dual-fre quency IP sounding in the west of the surveyed area. Gradient,pole-dipole and reverse pole-dipole arrays were used to acquire the data. Interpretation of the processed data shows eight veins that demonstrate diverging and converging phen omena. Therefore east of the surveyed area is considered as most prosperous zone in the study area.展开更多
文摘Variable IP method mainly measures the Percent Frequency Effect (PFE), and phase IP method mainly measures phase. They both aim at finding IP anomaly. However, only using PFE anomaly or single phase anomaly can′t distinguish IP body′s property. The authors put forward a new method——dualfrequency and multiparameter IP method, which can not only find anomaly of PFE and phase, but also provide the property information of IP anomaly resource. The authors also have invented the dualfrequency and multiparameter IP instrument. A lot of experiments and field work have been done. The results show that the instrument is valuable in distinguishing IP anomalies.
文摘The dual-frequency(DF)IP is a new kind of frequency domain IP method.Not only is thedual-frequency current transmitted simultaneously but the electric potential difference due to dualfrequency current is measured synchronously.This paper discusses the principle and charateristicof DF current, DF current can be formed by two rectangular currents which must be coherent orelse false Percent Frequency Effect(PEE)will occur.DF currents with different waveforms areequivalent in the ability of detecting IP anomalies.Unstable current has much less effect of DFIP than on conventional variable frequency method;in fact,there is no need to stabilize currentin DF IP method.There are many differences between harmonic contents of DF current and thatof rectangular wave used in variable frequency method,but theoretical analysis,labaratory mod-eling and field data all show that the anomalies of both DF and variable frequency method are sim-liar in character and close in value.DF IP can match variable frequeney IP and time domain IPin the ability of detecting IP anomaly,furthermore,dual-frequency IP measurements are morerapid,more accurate and more simple in operation.
文摘Gold mineralization in the Tanghuping Prospect was the target of the geophysical exploration. The mineralization shows close relation with geological structures and is accompanied by alteration. Sulfide concentrations in the altered zones w ere used to trace the mineralization by Induced Polarization(IP) method. Through laboratory and field measurements of some selected samples of the study area,t heir geophysical properties were studied carefully. After that by numerical calc ulation,a geophysical model was built. Six lines were designed to use dual-fre quency IP sounding in the west of the surveyed area. Gradient,pole-dipole and reverse pole-dipole arrays were used to acquire the data. Interpretation of the processed data shows eight veins that demonstrate diverging and converging phen omena. Therefore east of the surveyed area is considered as most prosperous zone in the study area.
