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Geostatistical comparison between blast and drill holes in a porphyry copper deposit

Abstract : Diamond drill-hole grades are known to be of better quality than those of blast holes; is this true? We present a formal study of a porphyry copper deposit in Chile where the variogram of 3 meter long drill hole samples is compared to 15 meter long blast hole ones and we show that the blast holes can be assumed to regularizing the point information deduced from the drill holes, except for a nugget effect specific to the blast samples. Complementary analyses based on migrated data show that the drill holes also have their own errors.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01160562
Contributor : Serge Antoine Séguret <>
Submitted on : Wednesday, June 22, 2016 - 10:26:23 AM
Last modification on : Thursday, September 24, 2020 - 4:34:19 PM
Long-term archiving on: : Friday, September 23, 2016 - 12:43:44 PM

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Serge Antoine Séguret. Geostatistical comparison between blast and drill holes in a porphyry copper deposit. WCSB7 7th world conference on sampling and blending, Jun 2015, bordeaux, France. ⟨10.1255/t0sf.51⟩. ⟨hal-01160562v2⟩

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