The geophysical data is collected simultaneously with realtime differentiallycorrected global positioning system dgps coordinates. Geomatrix earth science limited em343 electromagnetic. Sites that are generally open and over 1 hectare in size, a geonics em31 ground conductivity survey is often recommended. However, data logging devices such as the juniper archer are available as an optional rental item. Third party software from geomar, geosoft, golden software. Provided engineering design and implementation to support geonics electromagnetic products line such as em31, em38, em39, em633d and protem cm. View dana szovas profile on linkedin, the worlds largest professional community. Em343 the em343 is a fast, simple to operate, costeffective instrument for the engineering geophysicist, geologist and hydrogeologist alike and has been particularly successful for mapping deeper groundwater contaminant plumes and for groundwater exploration. Contact bedrockmapping for geophysical services sales. They were conducted with the geonics em31 and em343 instruments using vertical and horizontal dipole modes at 3. The unit incorporates our trimble pathfinder pro dgps system for positioning. And with above features also comes the simultaneous full control of the em31. Geonics data acquisition and data processing programs for download listed by instruments.
The geonics em31 is a frequencydomain electromagnetic geophysical instrument designed to measure bulk soil conductivity, also known as apparent conductivity. Geonics ground conductivity meters, the most versatile geophysical instruments for geological, environmental, geotechnical, agriculture,and archaeological applications. With the introduction of the em31 ground conductivity meter in 1976, geonics began to service industries, such as engineering and the environment, with a. Digital signal output, required for data collection with the dl600das70 system, is available as an option for all models of the em343. The em31mk2 is an updated version of the standard em31. Electromagnetic geonics em31 geonics em31 ground conductivity meter. Geonics em31, em34, and em38 systems measure the terrain conductivity, inphase response, and magnetic susceptibility of rock, soil, fill, pore fluids, and metal using fdem. The geonics em31mk2 is used to noninvasively estimate the conductivity of the shallow subsurface. Geonics em31 ground conductivity meter exploration instruments.
Geophysical techniques archives pyramid environmental. Geonics em31 buried drum disposal suited for electrically conductive environments then electrical resistivity methods. Geophysical services llc 33 years with over geophysical surveys geophysical surveying and mapping services by geophysical services llc established 1985 geophysical services llc has provided geophysical surveying and mapping services for over thirty years. Ground conductivity meters provide a noninvasive method for measurement of subsurface conductivity and magnetic susceptibility. Developed test plans and training courses to keep thirty of geonics technicians up to speed, and trained them to troubleshoot any malfunctioning electronics and software bugs. Em31mk2, em31sh, rt modified em31, and em31 analog. Incorporated in 1962, geonics limited is a world leader in the design, manufacture and service of electromagnetic em geophysical instrumentation. Figures 26 through figure 32 show the measured ground conductivity and geoelectric cross sections interpreted from the data using interpex em34plus software. Ground conductivity and inphase measurements are read directly from the. If the septic tank is plastic then a magnetometer would not work. Geonics builds two types of tdem systems, the em61 and the protem receiver. Em induction surveys are often conducted using the geonics em31, em34, and em38 terrain conductivity meters. Gpr ground penetrating radar surveys for engineering. Geophysical investigations with the geonics em61mk2 and.
The em31sh is a short version of the em31mk2 providing an effective depth of exploration of about four metres. Usgs scenario evaluator for electrical resistivity survey design tool. The em31mk2 maps geologic variations, groundwater contaminants, or any subsurface feature associated with changes in ground conductivity. After attending the symposium on application of geophysics to engineering and environmental problems in atlanta, georgia, usa he visited equipment manufacturers and researchers in. Geonics em31mk2 includes digital data logger and software rents for. The geonics em31 instrument is used to map average variations of electrical conductivity at depths between zero and three to six metres. Compared to em methods in general, currently available electrical resistivity. Geonics ground conductivity meters geonics limited. The targets were buried drums oriented north south and east west. A worldwide need to use water resources efficiently necessitates more effective approaches to study water and contaminant transport in soil. Rover geonics em343xl surveys clearview geophysics inc. Thus, it is common practice and straightforward for the company to provide well established geophysical methods like those discussed in this web site, to agricultural facilities, farmers, and professionals.
If there is metal in the construction of the septic tank, then an geonics em38, em61, or em31 may pickup the metal, if it is not buried too deep. Jones instrument corporation is an organization specializing in geophysical instrument rentals for subsurface. See the complete profile on linkedin and discover danas connections. Based on the design principles of inductive electromagnetics, ground. Use the dat31w program to view and interpret em31 survey results on a computer. The equipment selected for this investigation included the geonics em31 and em38 terrain conductivity meters. With this inductive method, surveys can be carried out under most geologic conditions including those of high surface resistivity such as sand, gravel, and asphalt.
Products and equipment from geonics limited environmental xprt. Incorporated in 1962, geonics originated with the development of the patented em16 vlf receiver, which became an exploration industry standard for ground vlf. Geonics data acquisition and processing software provides broad functionality for data management including the collection, transfer, positioning, editing and. The receiver needs to be paired up with one of the time domain transmitters em47, em57, or em67. A canadianowned company, located in mississauga, ontario, canada, geonics limited is a world leader in the design, manufacture and service of electromagnetic geophysical instrumentation. Rapid acquisition of spatially dense data sets is usually the most important requirement. Incorporated in 1962, geonics originated with the development of the patented em16 vlf receiver, which became an exploration industry standard for ground vlf instrumentation. However, the geonics em31 or an em38 may detect a change in apparent soil conductivities associated with the tank and its contents. Transmitter, receiver, 2 coils, 3 cables 10m,20m,40m the em343 is a simpletooperate, costeffective instrument for the geologist and hydrogeologist alike. Rent geonics em31 em61 em34 em38 and protem systems for engineers. Software for geonics instruments downloads geonics limited.
Geoseek uses the geonics em31dl terrain conductivity meter to measure soil conductivity and the geonics em61mkii system for precision metal detection. This study examined the effectiveness of a multireceiver electromagnetic induction probe geonics em3rt and modeling software emigma to delineate hydrological regimes at field scale. Geophysical instrumentation for geology, military, environment. Geonics publications related to applications of electromagnetic instruments in geophysical studies conductivity meters, time domain, metal detectors. Rtmap31 electromagnetic software geomatrix earth science ltd. Geonics em31 terrain conductivity device to measure the apparent conductivity per meter, as well as, the inphase ratio of secondary to primary magnetic fields at an experimental station in spinnerstown, pennsylvania. Engineering geophysics use instruments from many manufactures.
The em31 communicates conductivity data to the trimble as an external sensor. Optional software products for geonics instruments geonics limited. Em343xl in regions of particularly high cultural andor atmospheric noise, the em343xl including increased transmitter power and a larger transmitter coil improves the signaltonoise ratio by a factor of 10 at the 40 m spacing, and by a factor of 4 at the 10 and 20 m spacings. It provides conductivity measurements as the trimble collects location information. Using a patented electromagnetic inductive technique that allows measurements without electrodes or ground contact. Manufacturers like geonics, geometrics, advance geosciences. Environmental geophysics research egr laboratory eps. Geonics limited electromagnetic geophysical instrumentation. For automatic integration with gps, we suggest the trackmaker 31 software operating with the trimble ag114 gps. Additional input has been provided by peeter pehme and dr.
Em31mk2, em31sh, rt modified em31, and em31 analog data acquisition. The devices are nonintrusive and can be carried or towed. Geonics limited would like to acknowledge for their considerable input into this document, naeva geophysics inc. Evaluation of a geonics em3rt probe to delineate hydrologic regimes in a tiledrained field article in precision agriculture 125. Real time rt graphical presentation of the data during collection is possible by connecting a computer directly to the rs232 output port on the front panel with.
Instrumentation and software is available in the following product categories. Incorporated in 1962, geonics limited is a world leader in the design. From a commitment to address the varied, demanding realities of the survey environment, geonics instrumentation has developed an enduring reputation for practical design and reliable operation, supported by an equal commitment to prompt and comprehensive customer service. The instrument has an effective depth of penetration, or skindepth, of approximately 5.
Compared to em methods in general, currently available electrical resistivity systems are often capable of producing more detailed crosssections or psuedosections utilizing multielectrode resistivity arrays or towed capacitance coupled resistivity arrays. Calibrating and using an em31 electromagnetic induction. Incorporated in 1962, geonics limited is a world leader in the design, manufacture and service of. Army engineering quality control for oe digital geophysical mapping navigation geonics training em61 em31 em34 em38 learn about geonics equipment. Geonics limited is a world leader in the design and manufacture of electromagnetic geophysical instrumentation for geological, environmental, geotechnical, and uxo applications. Navigation and positioning were accomplished through the use of a juniper systems geode differential gps dgps antenna. Electromagnetic geonics em34 geonics em34 conductivity meter. Geonics em31 survey to locate underground storage tanks em induction method em induction and em utility location are the most common em techniques applied to shallow engineering and environmental investigations. It is more of a belief system than an engineering discipline, or as an electrical engineer once said to me in 1973 witchcraft. I am using a trimble geoexplorer 6000 in conjunction with a geonics em31. This system has proven itself useful for detecting both good and bad conductor sulphide mineralization located both shallow and 100s of metres deep. Geonics em31sh short includes digital logger and software rents for. The following manufacturers and suppliers are reliable sources and provide ongoing sales and support. Rent geonics em31 em61 em34 em38 protem em31 em61 em.
Electromagnetic instruments global positioning systems ground penetrating radar ground resistivity meters magnetic susceptibility meter magnetometers pipe and cable locators seismographs software vibration monitors pdf of geophysical equipment rental costs k. Calibrating and using an em31 electromagnetic induction meter to estimate and map soil salinity in the jarrah and karri forests of southwestern australia september 2006 forest ecology and. Pyramid environmental has years of experience utilizing ground penetrating radar gpr equipment and processing software to analyze geologic site conditions, evaluate the nature and integrity of subsurface strata, and locate buried objects such as usts, drums, or wastedebris. Navigation geonics training em61 em31 em34 em38 learn about geonics equipment.
Important advantages of the em31mk2 over conventional resistivity methods are the speed with which surveys can be conducted, the precision with which small changes in conductivity can be measured and the continuous readout and. Geonics em34 conductivity meter exploration instruments. The modular design of the protem time domain electromagnetic tdem. Rent geonics em31 em61 em34 em38 protem em31 em61 em34. Sites where buried metal is the main target, a geonics em61 metal detection survey is recommended. Geonics em61mk2 em61 operational procedures quality control recommendations or u. Geonics data acquisition and processing software provides broad functionality for data management including the collection, transfer, positioning, editing and presentation of recorded data. Software engineering, is an arcane, heady topic, with swimming pools of ink, and several forests of paper dedicated to it, during the last 35 years or so. With a smaller coil separation 2 m and lighter weight, the em31sh offers improvements in sensitivity to smaller nearsurface targets, lateral resolution and portability, while maintaining the high levels of accuracy and. The em31 has an effective penetration depth of about 6 m, is portable, and measurements may be taken continuously at walking speed while being carried above ground mcneill, 1980. Installation technology transfer program geophysics for. Using the same patented inductive method as the em31, the em343 uses 3 intercoil.
1240 1413 792 1445 1308 453 688 1457 690 394 955 993 62 1479 782 129 612 255 5 976 1505 1409 1274 1382 1537 1187 99 743 734 1037 301 1010 1455 3 572 558 1032 1240 61 615 780 1195 128 1292 746 1260