About Zion Geophysics

David Johnson is a global mineral explorer with over 25 years experience across a wide variety of geological terrains, deposit types and geographic areas.  With several discoveries to his credit and expertise in applying geophysical methods, David can help your company to find ore.


As Chief Geophysicist at Independence Group (ASX:IGO), David led regional and in-mine geophysics teams to exploration success, including discovery of the Moran and Long North nickel orebodies at Kambalda and the Rosie nickel deposit in the Duketon greenstone belt in Western Australia.  The Kambalda in-mine team made innovative use of underground TEM transmitter loops and a high-powered transmitter developed in collaboration with Curtin University.

David also discovered The Horn nickel sulphide deposit in the Wildara greenstone belt and contributed to the discovery of the Lounge Lizard nickel orebody (acquired by Western Areas from Kagara in 2012) south of Flying Fox in the Forrestania belt for LionOre.  He contributed to the Nordic Mining discovery of nickel sulphide mineralization in the Reinfjord and Lokkarfjord intrusions on the Øksfjord Peninsula, northern Norway, and the Ardiden Limited (ASX:ADV) Silver Star North graphite discovery in Ontario.  As a graduate geophysicist at WMC, he had a key role in the discovery of the Gum Pool palaeochannel groundwater resource for Leinster Nickel Operations using moving loop TEM.


David graduated from University of Melbourne in 1990 with a Bachelor of Science with Honours in Geophysics.  From 1995 to mid-1997, David completed his Master of Science degree at the University of Utah within the Consortium for Electromagnetic Modeling and Inversion (CEMI), funded by a WMC Company Fellowship.  He also holds a Graduate Diploma in Applied Finance from the Securities Institute of Australia.

David has held technical specialist positions with major mining companies (Western Mining Corporation, Rio Tinto) and mid-tier producers (LionOre, Independence Group).  He has served on the boards of private (Revelation Geoscience, a Vancouver-based multi-disciplinary geoscience consulting firm acquired by CSA Global) and public (Cassini Resources Ltd, an ASX-listed junior explorer) companies.  As a consultant, he has provided advice to explorers in Australia, Asia, Africa, the Americas and Scandinavia.  David is currently Vice President, Exploration at Gold Bull Resources Corp. (TSX-V:GBRC).

Connect with David:  logo-2c-21px-r

Gravity surveying in Burkina Faso – base station reading at the village well.  Two weeks were spent in the field, establishing a network of base stations for GPS and gravity, training local staff to use the instruments and starting the survey.  The remainder of the regional survey was monitored from the office via the internet.
Transient electromagnetic surveying in Lapland, Sweden.  A mid-winter program to follow up anomalies picked from SkyTEM data, resulting in successful drill testing.
Induced polarization survey in Rajasthan, India.  Visiting with the locals.  Surveying through farm yards, construction sites, fields, etc made safety No. 1 priority, followed closely by maintaining good relations with the local people.
EM surveying in the Gobi Desert, Mongolia.  Training and supervision of the survey in rugged terrain and harsh weather over a 2 month period produced high quality data.
On a death march across a Au-Ag property outside Lovelock NV.
Figuring out the CDM-DUO ground conductivity meter with some Valentis-Austhai geologists in Myanmar.  Yes, it was very hot and humid that day.
Using a SCIP Core Tester manufactured by Instrumentation GDD to take resistivity and chargeability measurements on some rock samples.  Gaining insight into how physical properties relate to geology is the first step in applying geophysics to an exploration problem.  When there’s no published data, you’d better generate it yourself.