resistivity Articles
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IP resistivity
This is a collection of various cases where the 2D resistivity imaging method pioneered by Advanced Geosciences Inc have been successfully applied. Click on a section below and you will be shown a full 2D resistivity imaging brochure detailing the case in question. Acknowledgement: These cases have been submitted by satisfied customers whom we thank for permission to publish ...
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Resistivity applications
Archaeological application • Detection of buried tomb. Mineralisation exploration • Determining the size of ore deposit; • Determining the developing direction of ore deposit; • Mapping the distribution of ore deposit. Engineering applications • Determining the thickness of shallow formations; • Mapping basement rocks and their lithology; • ...
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The impact of rolling resistance
Why are mining companies ignoring an easy solution to reducing their operating costs? The truth is, they are losing millions of dollars each year by underestimating the significant cost savings they could be getting with more efficient roads. One way to improve their bottom line is to make stronger, smoother haul roads so their trucks do not use as much fuel. More specifically, rolling ...
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Triclosan resistant bacteria in sewage effluent and cross-resistance to antibiotics
The purpose of this study was to identify triclosan tolerant heterotrophic plate count (HPC) bacteria from sewage effluent and to determine cross-resistance to antibiotics. R2 agar supplemented with triclosan was utilised to isolate triclosan resistant bacteria and 16S rRNA gene sequencing was conducted to identify the isolates. Minimum inhibitory concentrations (MICs) of organisms were ...
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Puncture Resistance Tester
The Puncture Resistance Tester is a highly advanced instrument specifically designed for accurately measuring the puncture resistance and durability of various materials. This sophisticated testing device applies controlled forces to assess the ability of a material to withstand puncture or penetration. Equipped with precision sensors and intuitive software, it ensures accurate data acquisition ...
By TestXpert
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Surface-point resistivity survey case study 1
Surface-points electrical resistivity surveys area can be used to detect one or several known underground anomalies in timely manner. A minimum of one borehole is needed to carry out Surface-points electrical resistivity surveys. A FlashRES electrical resistivity meter allows users to position active electrodes anywhere they want in the borehole, by conducting the survey in a surface-borehole ...
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Archaeological survey 2
The site of the Meadows’ Wesleyan Cemetery in the Adelaide is thought to contain more than 130 unmarked graves. This site initially had a chapel constructed on it in 1840 and the first burial in 1855. The initial chapel was replaced by a more substantial stone building in 1856. Burials continued in this cemetery sporadically until the 1940’s although the site became less used after ...
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The exploration depth of FlashRES resistivity meter
The formula for calculating the maximum depth is universal for all resistivity meters. The exploration depth depends on the survey line length. the survey depth is usually 20-25% of the survey line total length. For example, for 10m takeout cables, the total length of the cable is 10m*63=630m and this means the exploration depth is 0.2*630m to 0.25*630m. The resolution is 10% of the ...
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Roll along resistivity survey
A roll-along survey is a method for operator to survey a long line. After the initial survey, the operator will leave one cable on the ground and move the instrument and cables forward. So there is always one cable overlap between two surveys. Alternatively, the operator can divide the cable in half and only overlap 16 electrode spacing. In this way, the opearator could complete the survey ...
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Compare active and passive cables
Active cables refer to the cable with electronic part in the cable. Control and ADC in resistivity system controls the electronic parts in the cable, which controls the current injection. Passive cables refer to the cable with no electronic part in the cable. One of the advantage of passive cables is its ability to borehole and marine surveys, operator can put passive cables in water. Putting ...
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High efficient Mise-a-la-Masse case study
The traditional Mise-a-la-masse technique has a terribly reputation in its efficiency, however it is a good tool to seek the developing direction of the ore body. For example, to measure 128 voltages for one current position, operator needs inject current into ground 128 times, where the system will measure the voltage potential 128 times. If done manually, this can be very time consuming. ...
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Crosshole resistivity survey case study 1
Crosshole resistivity survey to find water Crosshole survey can be very effective in detecting groundwater and fracture zone. In some case, even with environmental limitation, where only a handful electrodes can be depolyed, crosshole resistiviy survey can still produce sound result. For example, in one of the survey we did, seven and fourteen electrodes were employed in the left and right ...
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What is 61-channel resistivity meter?
FlashRES resistivity meter has 64 electrodes, it uses one common ground electrode, two electrodes as current injection electrodes. For each current injection between A and B, the FlashRES resistivity meter measures the potential on remaining electrodes against the common ground electrode. In this way, 61 MN voltages are measured and hence FlashRES is a 61 channal resistivity meter. Currently only ...
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ZZ array
ZZ array can only be used by FlashRES resistivity meter. the array collect 256 AB pairs in express mode, with each current AB injection measure 61 voltage data. In 20 minutes, ZZ array can collect 15,616 data points. Operator can set the On and Off time to reduce the data collection data even less. FlashRES-64 can only use ZZ array, where FlashRES-UNI can collect ZZ array and all the other ...
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Compare popular resistivity meters with FlashRES
Although most resistivity meters nowadays can collect resistivity, IP and SP data and most of these systems are multi-channal resistivity meters, there is still a technical gap between traditional and next generation resistivity meters. FlashRES has six to 8 times more channel than traditional system, this means larger data quantity, which could help the resistivity inversion image generated ...
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Surface borehole resistivity survey case study 1
Surface borehole method can be used to effectively maximise the value of existing boreholes. This is because surface-boreholre method can give operator more geological and geophysical information around the borehole. For example, we did a surface-borehole survey, where there was already well-known mineralisation existing between 60-80m in Figure one and 100-115m. The inversion resistivity ...
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Bridge/tunnel base exploration case study
Case 1 A surface-borehole resistivity survey completed for bridge construction As shown infigure 1, this surface-borehole survey was configured to accurately locate known caves for structural reasons. The operator collected 60k data points in only one hour as a result of how the FlashRES-UNIVERSAL can collect all voltage readings for each combination of current electrodes. Figure 2 shows that ...
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Underground fracture detection case study
This underground fracture detection survey was completed by ZZ Resistivity Imaging Pty. Ltd. Two 12m electrode spacing 32-core cables were used to collect resistivity data. Then the data is coversed into true resistivity distribution images. Figure below clearly shows the glide plane is located between high (red) and low resistivity (green) zones. ...
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Engineering exploration
Resistivity method uses in engineering usually involve mapping void for construction safety purpose. One survey ZZ did was to use crosshole resistivity method to verify the size and location of two karasts. Due to site limitation, only 32 and 20 electrodes were used. The inversion image found two low resistivity areas next to the borehole, which resemble the void. Latter drilling conferred with ...
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Mineral prospecting case study 1
The electric resistivity survey can effectively find mineral deposit. It can usually be done by laying several surface transect to generate a 3D area resistivity distribution map. In accordance with the inversion image we did for a recent mineral prospecting job. The blue areas circled in red show low electric resistivity, which could indicate a higher chance of mineral deposit in that area. ...
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