RE: Valuation27 Oct 2019 11:18
I missed some text when pasting so here is some more detail on Russian resource classification. Has anyone actually looked up what has been classified at Monchetundra?
Resource/Reserve Classification
The former Soviet system for classification of reserves and resources, developed in 1960 and revised in 1981, is still used today in Russia and other CIS republics. Essentially, it divides mineral concentrations into seven categories, in three major groups, based on the level of exploration performed: fully explored reserves or resources (A, B, C1), evaluated reserves or resources (C2) and prognostic resources (P1, P2, P3).
Reserves and resources that can be matched to the usual international categories are classified into five main classes designated by the symbols
A
B
C1
C2
P1
Capital letters are used to designate ores that are economic. Sometimes, the same group of letters are written in lower case when the mineralization is considered subeconomic. A simple classification into classified (A,B,C1,C2) ābalansovyeā (balance) = commercially exploitable reserves and unclassified āzabalansovyeā (out-of-balance) = uneconomic resources is used. Synonyms of ābalansovyeā and āzabalansovyeā which are often met, and used descriptively, are ākonditsionniyeā (conditioned) and ānekonditsionniyeā (unconditioned).
Category A
Category A The reserves in place are known in detail. The boundaries of the deposit have been outlined by trenching, drilling, or underground workings. The quality and properties of the ore are known in sufficient detail to ensure the reliability of the projected exploitation.
Category B
Category B The reserves in place have been explored but are only known in fair detail. The boundaries of the deposit have been outlined by trenching, drilling, or underground workings. The quality and properties of the ore are known in sufficient detail to ensure the basic reliability of the projected exploitation.
Category C1
Category C1 The reserves in place have been estimated by a sparse grid of trenches, drill holes or underground workings. This category also includes reserves adjoining the boundaries of A and B reserves as well as reserves of very complex deposits in which the distribution cannot be determined even by a very dense grid. The quality and properties of the deposit are known tentatively by analyses and by analogy with known deposits of the same type. The general conditions for exploitation are known. The ore tonnage is derived from estimates of strike length, dip length and average thickness of the ore body. Allowance for barren blocks may be made statistically.
Category C2
Category C2 These reserves are based on an extremely loose exploration grid, with little data. The limits of the orebody are defined mainly by extrapolation within known geological structures, and from comparison with other similar deposits in the vicinity. The grade and mineral properties of the orebody are determined from core samples and