29 articles
How to draw Measured, Indicated, and Inferred boundaries on Indonesian projects. Not just drill spacing — geological continuity, data quality, and kriging variance.
Database structure, version control, audit trails, and common data corruption scenarios. The Indonesian field-camp-to-Jakarta-office workflow and where it breaks down.
How to set drill spacing for epithermal gold, porphyry Cu, laterite Ni, and sedimentary deposits in Indonesia. When infill drilling earns its cost — and when it's waste.
When to split domains, how to validate them, and the over-domaining trap. Indonesian epithermal case study showing why vein and halo must be estimated separately.
When indicator kriging beats ordinary kriging, how to build probability maps from binary transforms, and threshold selection for Indonesian gold deposits.
JORC and KCMI rules for public disclosure in investor presentations. What triggers a material change report, common compliance failures, and what you can't say on slides.
Why resource models over- or under-predict at the mill. Reconciliation factors, SMU vs block size, dilution, and the grade-control loop that fixes the gap.
SG measurement methods, common errors, and why tonnage errors dwarf grade errors. Indonesian nickel laterite case study where SG varied 1.2 to 1.8 across the deposit.
12 questions a KCMI auditor will ask: data validation, QA/QC, variogram, kriging, classification. A practical compliance checklist for Indonesian reporting.
Geoscience × data science for Indonesia: deterministic geostatistics, transparent algorithms, a variogram you can see. Three skills, not a ChatGPT wrapper.
From Orebit — practical geology tools for working geologists
