What is a gossan?
The rusty cap left when sulphide minerals weather at surface: how it forms, how to read it, and why not every gossan sits above ore.
Guides
Guides to exploration data
Plain explanations of the methods and terms behind our work: what they can support, and where they stop.
Prospectivity mapping explained
How geology, geochemistry and geophysics are combined into a ranking of ground, which methods suit sparse data, and what the map cannot tell you.
Can you use legacy assay data?
Old assays are cheap and plentiful, but methods and locations differ from modern data. How to test whether they can be used, and when to leave them out.
Exploration target versus mineral resource
Both are expressed in tonnes and grade. One is a conceptual range, the other a classified estimate. What separates them under JORC and NI 43-101.
Public geological data in Latin America
Geological surveys and mining cadastres publish maps, geochemistry, geophysics and tenure at no cost. What exists, and how to use it with care.
What a 3D model can show from twelve drillholes
Too few holes for a resource estimate, enough for a useful model. What sparse drilling can and cannot support in three dimensions.
Have data and a decision to make?
Tell us what you have and what you need to decide. We will say what your data can support, and what it cannot, before any work starts.