18 articles
A grade-tonnage curve looks simple — grade on one axis, tonnage on the other. But reading it correctly requires understanding what the curve assumes and what it hides.
Your kriging search ellipse determines which samples influence each block estimate. Too big and you over-smooth. Too small and you're noisy. Here's how to find the right one.
Search ellipse kriging Anda menentukan sample mana yang mempengaruhi estimasi setiap blok. Terlalu besar dan over-smooth. Terlalu kecil dan noisy. Begini cara menemukan yang tepat.
Kurva grade-tonnage terlihat sederhana — grade di satu sumbu, tonase di sumbu lain. Tapi membacanya dengan benar butuh pemahaman apa yang diasumsikan dan apa yang disembunyikan kurva.
Variogram Anda adalah pondasi estimasi kriging. Salah dan setiap blok di model Anda bias. Ini lima kesalahan yang paling sering saya lihat di proyek resource Indonesia.
Your variogram is the foundation of your kriging estimate. Get it wrong and every block in your model is biased. Here are the five mistakes I see most often in Indonesian resource projects.
Kapan membagi domain, bagaimana memvalidasinya, dan jebakan over-domaining. Studi kasus epitermal Indonesia yang menunjukkan kenapa urat dan halo harus diestimasi secara terpisah.
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.
From Orebit — practical geology tools for working geologists
