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Subsurface Mapping Tem Transient Electromagnetic Equipment Geological Groundwater Mineral Exploration Equipment1
Other Instruments MetersTransient Electromagnetic EquipmentTransient Electromagnetic
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
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Product Description Subsurface Mapping TEM Transient Electromagnetic Equipment Geological Groundwater Mineral Exploration EquipmentProduct DescriptionIntroductionIn geological exploration, understanding subsurface structures and materials is crucial for resource identification, environmental monitoring, and geotechnical investigations. Among the various geophysical techniques used for this purpose, Transient Electromagnetic (TEM) equipment has emerged as a powerful tool. TEM involves the use of electromagnetic fields to probe the subsurface, offering distinct advantages in terms of speed, accuracy, and non-invasiveness. This article explores the uses, advantages, and practical applications of TEM in geological exploration.What is Transient Electromagnetic (TEM) Equipment?Transient Electromagnetic (TEM) is a geophysical method that involves the measurement of the time decay of induced electromagnetic fields in the Earth's subsurface. TEM surveys typically consist of a transmitter that sends a pulse of electromagnetic energy into the ground and a receiver that measures the time it takes for the induced currents to dissipate. The data collected is then analyzed to infer subsurface electrical properties, such as resistivity, which can be used to map geological features.Uses of Subsurface Mapping TEM Transient Electromagnetic Equipment Geological Groundwater Mineral Exploration Equipment Subsurface Mapping: TEM is widely used for mapping the depth and geometry of geological layers. The resistivity variations in the subsurface can indicate different rock types, water content, or mineral deposits. For example, high-resistivity zones may indicate the presence of dry rocks, while low-resistivity areas might suggest groundwater or clay-rich deposits.Mineral Exploration: One of the key applications of TEM is in mineral exploration, especially for locating ore bodies. Many valuable minerals such as copper, gold, and silver are associated with distinctive resistivity contrasts. TEM helps in detecting these anomalies, enabling more efficient targeting of drilling operations.Environmental and Hydrogeological Investigations: TEM is effective for investigating groundwater resources, identifying contamination plumes, and mapping the subsurface flow of water. The technique is also used for assessing soil and rock conditions in environmental studies, particularly in the context of pollution, waste disposal, and groundwater contamination. Oil and Gas Exploration: In some cases, TEM is used to detect hydrocarbons and oil reservoirs. Variations in resistivity can be indicative of the presence of oil and gas, although this application is less common than its use in mineral exploration.Specifications of Subsurface Mapping TEM Transient Electromagnetic Equipment Geological Groundwater Mineral Exploration Equipment TransmitterTransmitting voltage≤200VTransmitting current≤50ACurrent measurement precisioncurrent range before power supply being cut off is 0~50A, display resolution is 0.01A.Power supply frequencies 0.0625Hz, 0.125Hz, 0.25Hz, 0.5Hz, 1Hz, 2Hz, 4Hz, 8Hz, 16Hz, 32HzTransmitting waveform +ON, OFF, -ON, OFF, equal width and dual polarityTurn-off delay time1μs~1000μsTurn-off time≤1.2μs (pure resistance), changing with the transmitting current and transmitting coil when connecting to the coilsDamping resistance1000ΩTransmitting coil0.1km×0.1km single turn ~ 2km×2km single turnSynchronization modeexternal synchronization (cable, GPS)Power supplyinternal 12V8.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hoursDimension525×436×217mm 3Weight18.5kgWorking temperature -10°C~+50°C ReceiverNumber of channel1Pre-amplification gain8, 32 timesMain amplification gain1, 2, 4, 8, 32, 64, 128 timesBand-pass0~50k Hz (liner phased filter), full band-pass 0~400k HzSuppression80dB A/D16 bitMin sample interval1μsTrace number≤128Stacking times1~9999 timeSynchronization modeinternal 12V9.6Ah rechargeable battery (or external 12V power supply) lasting for over 10 hoursPocket PCWindows Mobile 6.0 system with software such as Word, Excel, etc., 320x240 true color, 64MB Flash Rom/ 64MB SDRAM/64MB 2GB CF card, able to store over 200,000 readings of sampled data,2 original rechargeable batteriesPortsBluetooth, infrared and serial port Dimension340×295×152mmWeight5.3kgWorking temperature-10°C~+50°CStandard configuration of WTEM-2 Geophysical TDEM Time Domain Transient Electromagnetic Equipment01WTEM-2J TEM Receiver02WTEM-2D 15KW TEM Transmitter03Win10 Tablet PC to control the TEM system receiver and the system Optional instruments:PTT-40A Antenna & AdapterWTEM-2T/GPS Synchronized Controller
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