This beautifully presented course manual supporting Snowden Mining Industry Consultants renowned course in Resource Estimation represents the culmination of more than 20 years of course refinements, revisions, improvements and further refinements. No doubt the manual will continue to be improved in the future as new information becomes available and new techniques are introduced. After all a course manual must be a dynamic, living document that remains relevant to the mining industry.

The Most Important Notations and Abbreviations     
Introduction to Some Fundamental Statistical Concepts     
General Definitions     
Frequency Distribution     
Mineral Deposit Statistics
Treatment of the Data Set     
A Simple Case of Calculating a Frequency Distribution     
Using Class Intervals for Calculating Frequency Distributions     
Frequency Distribution of Samples with Dissimilar Specifications
Mean, Variance and Standard Deviation     
The Mean             

SRK Consulting (UK) Limited (“SRK”) is an associate company of the international group holding company, SRK Consulting (Global) Limited (the “SRK Group”). SRK has been commissioned by Anglo Pacific Group Plc (“Anglo Pacific”, hereinafter referred to as the “Company”) to prepare a technical report (the “Technical Report”), in accordance with National Instrument 43-101 - Standards of Disclosure for Mineral Projects (“NI 43-101”), Form 43-101F1 – Technical Report (the “Form 43-101F1”), and Companion Policy 43-101CP (the “Companion Policy”) as published and updated from time to time (latest 23 December 2005) by the Canadian Securities Administrators (“CSA”) on the Company’s royalty in relation to the Kestrel Coal Mine (“Kestrel Mine”), Queensland, Commonwealth of Australia (“Australia”). The Company, via its wholly owned Australian subsidiary Gordon Resources Limited (“GRL”), owns half of the royalty entitlement (the remaining 50% is held by three other major institutions) to the output from: 
 Kestrel Mine which is operated by Kestrel Coal Pty Ltd (“Kestrel Coal”) and for which the most recent marketable reserves over which the royalty is applicable is circa 56Mt. This 
is from 68Mt of ‘Coal Reserves’ and an assumed yield of 82.4%; and 
 Gregory Crinum Mine which is operated by BHP Billiton Mitsubishi Alliance (“BMA”) and for which the most recent marketable reserves over which the royalty is applicable is circa 17Mt. This is from 21Mt of ‘Coal Reserves’ and an assumed yield of 82.4%. <...>

1.2 Prior to September 1999 the estimation and reporting of Coal Resources and Coal Reserves in Australia were prescribed by the "Australian Code for Reporting Identified Coal Resources and Reserves (February 1986)". This code was ratified by the Government Geologists’ Conference in April 1986 and appended to the "Australasian Code for Reporting of Identified Mineral Resources and Ore Reserves" (The JORC Code), prepared by the Joint Ore Reserve Committee (JORC) in February 1989. The JORC Code was subsequently revised in 1992 and 1996.

В основе данной статьи лежит работа Тейлора (H.K.Taylor “General background theory of cut off grades”), опубликованная в 1972 г. Автор данной статьи поставил перед собой задачу познакомить российских горных инженеров с этой и работами других авторов в связи с тем, что горный бизнес в Российской федерации ведется в условиях рыночной экономики и специалисты горных предприятий должны владеть всеми инструментами, позволяющими повышать эффективность горного производства. Так как изложение теории бортовых содержаний занимает очень большой объем, то автор данной статьи позволил себе разбить ее на две части, сократить и несколько модернизировать ее изложение (начало статьи (часть I) в МВ №2 - 2016 г).

В основе данной статьи лежит работа Тейлора (H.K.Taylor “General background theory of cut off grades”), опубликованная в 1972 г. Автор данной статьи поставил перед собой задачу познакомить российских горных инженеров с этой и работами других авторов в связи с тем, что горный бизнес в Российской федерации ведется в условиях рыночной экономики и специалисты горных предприятий должны владеть всеми инструментами, позволяющими повышать эффективность горного производства. Так как изложение теории бортовых содержаний занимает очень большой объем, то автор данной статьи позволил себе разбить ее на две части, сократить и несколько модернизировать ее изложение.

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This text consists of two parts, comments on “Classification and Reporting of Mineral Resources for High-Nugget Effect Gold Vein Deposits,” by S.C. Dominy, P.R. Stephenson and A.E. Annels, Volume 10, No. 3, pp. 215-233, and related comments on some features of the JORC Code.