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

Serge Antoine Séguret | Zendy

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

Author(s) -

Serge Antoine Séguret

Publication year - 2015

Publication title -

tos forum

Language(s) - English

Resource type - Journals

eISSN - 2053-969X

pISSN - 2053-9681

DOI - 10.1255/tosf.51

Subject(s) - drill , drilling , geology , metre , blast furnace , sampling (signal processing) , materials science , engineering , metallurgy , detector , physics , telecommunications , astronomy

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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