Consideration of the mining method is an essential component of ore reserves evaluation. This is particularly true where the profitability of a project is conditioned by the ability to mine selectively. Linear estimation methods such as Ordinary and Simple Kriging commonly fail to provide unbiased estimates of recovered ore tonnage and metal content which means that a mining project can be expo...

The Ok Tedi Complex hosts a world-class porphyry copper-gold deposit. Samples from the Ok Tedi Complex and the neighbouring Mount Ian Complex were analyzed for major and trace elements using XRF and HR-ICP-MS, and the isotopic composition of S in sulphides was analyzed by Elemental Analyzer. Major element geochemistry indicates that both complexes are alkaline and contain rocks ranging in compo...

a high percentage of world copper production is obtained from porphyry copper reserves, these reserves are characterized by: very high tonnage, greater horizontal dimensions than vertical, association with stock like intrusion masses, dispersed minerals in the porphyry mass and in its neighbor rocks, intense sericitization and inplace silicification. the porphyry coppers are concentrated by flo...

sarcheshmeh porphyry copper deposit is located 65 km southwest of rafsanjan in kerman province. the sarcheshmeh deposit belongs to the southeastern part of urumieh-dokhtar magmatic assemblage (i.e., dehaj-sarduyeh zone). intrusion of sarcheshmeh granodiorite stock in faulted and thrusted early-tertiary volcano-sedimentary deposits, led to mineralization in miocene. in this research, the mass ch...

In the Buchim porphyry copper deposit, we determined several representative rare mineral phases, comprising metals from gold-palladium group as well those bismuth-selenium (Cu-Bi-Se-Te-As) group. The phases are represented by new in bismuthinite, galenobismutite, krupkaite, friedrichite, emplectite, laitakarite and native bismuth of gold-palladium, including gold palladium with their elemental ...

Jiama is a super-large porphyry copper–polymetallic deposit located in the Gangdese metallogenic belt of southern Tibet. The consists combination polymetallic skarn, Cu–Mo mineralization at contact between Porphyry and hornfels, distal Au fault. current metal reserves are 7.4 Mt Cu, 0.6 Mo, 1.8 Pb–Zn, 6.65 Moz Au, 360.32 Ag, with skarn to porphyry–hornfels host-rock ratio ~3:1. Based on detaile...