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Development of magnetometers in AustraliaFeatureh. HeliSAM Specialists in Deep Penetration EMThe development of high powered transmitters such as the SAMSONHPTX-80 has made feasible the supply of high current togalvanic electrodes that are separated by several km. The area Gap TM-7 SAM receivers and Totalbetween these electrodes that can be explored using TMI and %ȴHOG&VYDSRXUVHQVRUV([WUHPHO\TFMMR maybe several square km, and the use of a towed bird ORZQRLVHPHDVXUHPHQWVDWYHU\ORZsensor can deliver excellent spatial resolution in a fast and 7[IUHTXHQFLHV2ULHQWDWLRQLQGHSHQ-economic manner. Similarly, the use of a large area GHQWUHDGLQJV5HODWLYHLPPXQLW\WRelectromagnetic loop to energise the ground can make available a ZLQGDQGYLEUDWLRQlarge prospective area capable of benefitting from the efficiencyand speed of airborne data acquisition measuring TMI and TFEM. SAM EMReferences 6XE$XGLR0DJQHWLFV7HFKQRORJ\ '\QDPLFQRQVWRSDFTXLVLWLRQRIBoggs, D. B., Stanley, J. M., and Cattach, M. C., 1998, KLJKGHȴQLWLRQ7RWDO%ȴHOG(0DQG Feasibility studies of TFMMIP and TFEM surveying with 70ΖDWORZ7[IUHTXHQFLHV sub-audio magnetics: Exploration Geophysics, 29, 290–295. doi:10.1071/EG998290 HeliSAM FLEMCattach, M. C., Stanley, J. M., Lee, S. J., and Boyd, G. W., $LUERUQHDFTXLVLWLRQHɝFLHQF\DQG 1993, Sub-audio magnetics (SAM) – a high resolution KLJKSRZHUJURXQGORRSV*UHDWHU technique for simultaneously mapping electrical and magnetic depth penetration than achievable properties: Exploration Geophysics, 24, 387–400. ZLWKDLUERUQH(06XLWDEOHIRUODUJH doi:10.1071/EG993387 ORRSVDQGLQDFFHVVLEOHWHUUDLQ7RWDO %ȴHOG(0DQG70ΖDWORZ7[IUHTXHQ-Duncan, A., Cattach, M. C. and Griffin, S. M., 2007, Total field FLHV8$9SODWIRUPLQGHYHORSPHQW EM for highly conductive targets: ASEG Extended Abstracts, No. 1. SMARTem24ESTCP, 2003, Project 200322 Annual Report, Sub-audio ΖQGXVWU\VWDQGDUG(0Ζ75HFHLYHUV magnetics: technology for simultaneous magnetic and ZLWKFRPSRQHQW60$57)OX[JDWHV electromagnetic detection of UXO. %ȴHOGRU*HR3DN595G%GWFRLOVStanley, J. M., and Cattach, M. C., 1990, The use of high Downhole EM definition magnetics in engineering site investigation: Exploration Geophysics, 21, 91–103. doi:10.1071/EG990091 (0Ζ7'LJL$WODQWLVGLJLWDOERUHKROH PDJQHWRPHWHUFRXSOHGZLWK*HR3DNStanley, J. M., Sertsrivanet, S., and Clark, P. J., 1992, Magnetic +37;WUDQVPLWWHUVUHVXOWLQJLQWKH exploration beneath a near surface magnetic noise source: PRVWSRZHUIXOGRZQKROH(0005 Exploration Geophysics, 23, 323–326. doi:10.1071/ V\VWHPVFXUUHQWO\DYDLODEOH+LJK EG992323 VLJQDODQGVLPXOWDQHRXVDFTXLVLWLRQ RIFRPSRQHQWVPLQLPLVHVVWDWLRQStanley, J. M., Cattach, M. C., Griffin, S. M., and Townsend, RFFXSDWLRQWLPHDQGVXUYH\FRVW J. A., 2005, Environmental applications of sub-audio 'RZQKROHPDJQHWLFVDQGKROH magnetics: Exploration Geophysics, 36, 198–205. WUDMHFWRU\SURYLGHGNPZLQFKHV doi:10.1071/EG05198 GeoPak Transmitters *DSRSHUDWHDUDQJHRIVWDWHRIWKHDUW WUDQVPLWWHUVFDSDEOHRIXSWRN: DQG$+LJKSRZHUSURYLGHVIRU GHHSH[SORUDWLRQDQGKLJKTXDOLW\GDWD DWUHGXFHGFRVW5HPRWHO\RSHUDWHGIRU VDIHW\DQGVXUYH\HɝFLHQF\ For all enquiries please contact us at: +61 (0)7 3846 0999 gapgeo.com FEBRUARY 2017 PREVIEW 49

Business directory “hƐŝŶŐĂƐĐŝĞŶƟĮĐĂůůLJƉƌŝŶĐŝƉůĞĚĂƉƉƌŽĂĐŚ  ƚŽŝŵƉƌŽǀĞĮŶĂŶĐŝĂůďƵŽLJĂŶĐLJ͟ Noll Moriarty, M.Sc(Hons), CFP® AƵƐƚƌĂůŝĂŶΘ/ŶƚĞƌŶĂƟŽŶĂůůŝĞŶƚƐ SƉĞĐŝĂůŝƐŝŶŐŝŶĚĞƚĂŝůĞĚĮŶĂŶĐŝĂůĂĚǀŝĐĞ ƌĞƋƵŝƌĞĚďLJĚŝƐĐĞƌŶŝŶŐƉƌŽĨĞƐƐŝŽŶĂůƐ wǁǁ͘ĂƌĐŚŝŵĞĚĞƐĮŶĂŶĐŝĂů͘ĐŽŵ͘ĂƵ 3/1315 Gympie Rd, Aspley, QLD. Phone 1300 387 351 or (07) 3863 1846 Archimedes Financial Planning Pty Ltd: AFSL No. 437294 | ABN 68 094 727 152 Gap GeoPhysics Australia Pty Ltd GapGeo.com ([SORUDWLRQDQG(QYLURQPHQWDO6HUYLFHV Sub-Audio Magnetics (SAM) | HeliMag / HeliSAM | UAV SAM 6$0621%ȴHOG'HHS6HDUFK(0_'RZQKROH%ȴHOG(06XUYH\V +LJK3RZHU*HR3DN7UDQVPLWWHUV_+LJK'HȴQLWLRQ*URXQG0DJQHWLFV (QYLURQPHQWDO0DSSLQJ_8;2'HWHFWLRQ7HFKQRORJLHV Instrument Manufacturers | Instrument Sales and Rental Dr Malcolm Cattach 2/16 Duncan Street Chief Geophysicist, Chairman West End Qld 4101 M: +61 419 696 982 P: +61 7 3846 0999 E: [email protected] F: +61 7 3844 0022 Engineering & Environmental Geophysics Consulting Services Geophysical Equipment Rental ADVANCED SUBSURFACE INVESTIGATIONSPhone: +61 2 9890 2122 / +61 8 64361591 / +61 3 83183212Fax: +61 2 9890 2922E-mail: [email protected]: www.gbgoz.com.au Sydney Perth Melbourne Technical Workshop 20 Oborn Rd MOUNT BARKER SA 5251 BOREHOLE LOGGING SYSTEMS ˜ Sales ˜ Rentals ˜ TrainingGROUND & AIRBORNE INSTRUMENTS Sales & Rentals Specialising in: ˜Acoustic and Optical Televiewers˜Gravity Matt Edmonds ˜WellCAD Software Matt Edmonds˜Magnetics ˜Quick Link Logging Tools˜EM Conductivity Systems P +61 (0) 407 608 231 ˜Back up support, repairs, training P +61 (0) 407 608 231˜Seismic Systems W geosensor.com.au W geosensorwireline.com˜Spectrometers & more Technical Workshop. 20 Oborn Rd MOUNT BARKER SA 525150 PREVIEW FEBRUARY 2017