Grade-Tonnage Curves: How to Read Them and When They Lie
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.
12 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.
When indicator kriging beats ordinary kriging, how to build probability maps from binary transforms, and threshold selection for Indonesian gold deposits.
Kapan indicator kriging mengalahkan ordinary kriging, bagaimana membangun peta probabilitas dari transformasi biner, dan pemilihan threshold untuk endapan emas Indonesia.
Composite length adalah salah satu keputusan paling berpengaruh sekaligus paling jarang dibahas dalam estimasi sumber daya. Ini kerangka kerja teruji di lapangan untuk memilih yang tepat.
Composite length is one of the most consequential and least-discussed decisions in resource estimation. Here's the field-tested framework for picking the right one.
From Orebit — practical geology tools for working geologists