December 2015
The latest CRIRSCO developments
Reviewing the achievements of a growing international body that ensures best practice in the minerals industry The Joint Ore Reserves Committee (JORC) is a founding member of the Committee for Mineral Reserves International Reporting Standards (CRIRSCO), which was formed in 2002. In fact, AusIMM and JORC members have played significant roles in CRIRSCO’s development, starting with the late Norman Miskelly, who was the driving force at its inception and the Founding Chairman. Pat Read More
December 2015
Ore Reserve estimates and changes in commodity price – a survival guide
Understanding price fluctuations and implementing best practice in Reserve estimation Volatile commodity prices present particular challenges for Competent Persons and companies and their obligations to keep the market informed. One of the hot-topics from the recent Monograph 30 Roadshows was the influence of recent swings in commodity price. In extreme cases people asked ‘does the Ore Reserve estimate still exist?’ and we heard a paper from Michael Creech where he presented a study of Read More
December 2015
Geotechnical considerations for Resource and Reserve estimation
Why geotechnical design should be seen as an integral part of the overall mine design During last year’s Monograph 30 Roadshow a number of questions were raised regarding the need for additional guidance in connection with geotechnical input into Resource and Reserve estimations. In this respect this article advances some of the concepts given in Sullivan’s 2014 paper ‘The influence of geotechnical and groundwater factors on Ore Reserve estimation’ (Sullivan, 2014). It is important to Read More
December 2015
Strengthening the community and environmental aspects of the JORC and VALMIN Codes
Providing guidance on community and environmental aspects for professionals applying JORC and VALMIN In early 2014 the AusIMM Community and Environment (C&E) Society committee commenced an initiative to determine if the Society’s expertise, experience and knowledge on community and environmental aspects could help assist and/or strengthen the JORC and VALMIN codes. While community and environmental aspects are mentioned to some degree in both codes, the C&E Society committee were Read More
December 2015
The influence of drill hole deviation on Resource estimates in steep dip deposits
Addressing knowledge gaps in steeply dipping coal geological models and the implications for Resource and Reserve estimates Author audits of steeply dipping coal geological models in the recent boom time highlighted knowledge gaps in the area of true and apparent thickness and flow-on effects to Resource and Reserve estimates. Discussion with metals geologists suggests that this issue is well understood in their domain; the profusion of relevant information in the oil and gas literature Read More
C&E Society to review community and environmental aspects of JORC and VALMIN Codes
The Community and Environment Society committee are investigating how their expertise, experience and knowledge can help strengthen the JORC and VALMIN Codes in relation to community and environmental aspects. To complete the short survey, please click here. Background While these aspects are mentioned in both Codes, the Society committee believes these are not currently covered in sufficient detail given the growing impact that these issues have on the potential viability of the Read More