Up until mid-June 2018, I had a collection of blog posts here, mainly describing projects I'd completed and the ways I went about solving exploration problems and processing datasets to extract geological insights. They were fairly popular, generating hundreds of hits on this site every month. I took the blog posts offline after concluding that … Continue reading Where have all the Zion Geophysics blog posts gone?
Mapping the thickness of regolith developed over an orogenic gold project area can often provide clues to the location of structures and strongly altered zones, as these may be associated with development of a thicker weathering profile. Obtaining this information from drilling alone is expensive. Detailed gravity measurements provide one means of imaging variations in … Continue reading Interpreting structure and regolith thickness in an orogenic gold prospect from detailed gravity data using VPmg inversion software
The Moran nickel orebody (June 2009 resource est. 456,000t @ 7.1% Ni for 32,400t contained Ni metal) was discovered in 2008 when underground drill-hole LSU-152 intersected a 12.3 m thick interval of mineralisation with an average grade of 6.0% Ni. The discovery drill-hole had been designed to test a strong conductor detected by transient electromagnetic surveys read in … Continue reading Moran nickel sulphide orebody discovery using DHTEM
I spent August-November 2016 in the eastern end of the Altai Mountains in Ömnögovi Aimag, helping a Logantek Mongolia LLC geophysics crew to read a fixed-loop transient electromagnetic survey in some pretty rough terrain, and providing real-time reporting of results and interpretation to the client. We succeeded in locating a potentially significant extension to a prospect, … Continue reading Fixed-loop TEM for VMS in the Gobi Desert