TargetTEM^TM

"They said it was just another filter ... then they saw the drill targets!"

TargetTEM^TM is a combined anomaly-detection and data-compression algorithm specifically for multichannel, airborne, transient electro-magnetic (TEM) survey data. It resolves both conductive and resistive features and discriminates these from the responses of conductive overburden and conductive host rocks.

Conventional data-processing techniques transform multichannel TEM data into conductivity-depth images showing the conductivity of the sub-surface at particular depths. These algorithms assume that the sub-surface is horizontally layered, but this is usually not the case and, hence, they provide only limited resolution of the underlying geology.

Conventional techniques also often fail to resolve subtle conductive and resistive features that can be important exploration targets. TargetTEM^TM does not compute conductivity or depth and makes no assumptions about the underlying geology. Hence, it provides the highest resolution of subtle features in complex geological environments.

TargetTEM^TM can be applied to multichannel B-field (magnetic sensor) and dB/dt (coil sensor) data from all types of airborne TEM systems such as GEOTEM, MEGATEM, TEMPEST, HOISTEM, QUESTEM, SPECTREM, AeroTEM, VTEM etc.

TargetTEM^TM colour brochure (244 KB).

TargetTEM^TM is used by geologists to quickly analyse the large volumes of complex, multichannel data characteristic of all airborne TEM surveys. It is being used by mineral and petroleum explorers to identify drill targets in a wide variety of geological environments. It is also being used in groundwater and salinity studies and has found application in a wide variety of geological environments.

TargetTEM^TM benefits geologists and explorers by:

• increasing the resolution of a wide range of geological features;

• helping to identify drill targets; and

• reducing the time and cost of analysing multichannel TEM data.

TargetTEM^TM is a new standard in geophysical data processing -- another innovation from the research laboratory of Vector Research.

Further details about TargetTEM^TM and a description of its output products are given in Vector Research Technical Note No. 9 downloadable below. A number of TargetTEM^TM case histories can also be downloaded below. These compare the raw survey data and conventional conductivity-depth images with the various TargetTEM^TM responses and demonstrate the superior resolution of TargetTEM^TM.

Specialised data processing using TargetTEM^TM is available only from Vector Research in Perth, Western Australia. Processing costs are based on the volume of survey line data processed; i.e. the survey line distance measured in kilometres. To convert survey area to survey line distance, use the conversion factors given in Vector Research Technical Note No. 6, downloadable below.

To discuss your TargetTEM^TM data processing requirements contact Stephen Mudge of Vector Research.

TargetTEM^TM is a trade mark of Vector Research Pty Ltd.

The following PDF files provide more-detailed information.

Technical Notes

	Technical note # 9: TargetTEMTM A two-page description of TargetTEMTM (113 KB).
	Technical note # 6: convert survey area to survey line distance A one-page technical note describing how to convert a survey area in square kilometres to a survey line distance in kilometres (83 KB).

Case Histories

	Case history # 11: nickel - greenstone belt (HOISTEM) DINGO RANGE, Yilgarn Craton, Western Australia (190 KB)
	Case history # 12: manganese (HOISTEM) PILBARA CRATON, Western Australia (311 KB)
	Case history # 13: salinity (HOISTEM) LAKE GORE, Esperance, Western Australia (211 KB)
	Case history # 14: nickel - greenstone belt (GEOTEM) WEST MUSGRAVE BLOCK, Western Australia (303 KB)
	Case history # 15: nickel - greenstone belt (HOISTEM) HARTS RANGE, Arunta Province, Northern Territory, Australia (231 KB)

The documents above are in PDF format. They can be viewed using Adobe’s free Adobe Reader software. You probably already have this installed on your computer, but if not, you can grab a free copy here: www.adobe.com/products/acrobat/readstep2.html.