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Exhibit Organizational Structure.
Areas of Interest. General Development of the Business. ificant Transactions. of Operations in Production and Guidance. Reportable Operating Segments. Nevada Gold Mines Turquoise Ridge. Other Nevada Gold Mines. Porgera North Mara. Other Mines Gold. Other Mines Copper.
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Mineral Reserves and Mineral Resources. Marketing and Distribution. Employees and Labor Relations.
Board and Management Experience and Oversight. Local Presence.
Internal Controls and Cash Management Practices. Cortez Property. Carlin Complex. Turquoise Ridge Complex.
Pueblo Viejo Mine. Kibali Mine. Loulo-Gounkoto Mine Complex. Government Controls and Regulations. Legal Proceedings. Relevant Education and Experience. Participation on Other Audit Committees.
External Auditor Service Fees. A chemical analysis to determine the amount or proportion of the element of interest contained within a sample, typically base metals or precious metals. Oxidation process in which high temperatures and pressures are applied within a pressurized closed vessel to convert refractory sulfide mineralization into amenable oxide ore.
A payable secondary metal or mineral product that is recovered along with the primary metal or mineral product during the concentration process. Naturally occurring carbon present in the ore from the decay of organic material which can result in an inadvertent loss of precious metals during the cyanidation process.
Carbon-in-column CIC. A method of recovering gold and silver from solution following cyanidation in the process by orption of the precious metals onto prepared carbon burnt coconut shell.
Carbon-in-leach CIL. A recovery process in which precious metals are dissolved from finely ground ore during cyanidation and simultaneously orbed on relatively coarse activated carbon burnt coconut shell granules. The loaded carbon particles are separated from the slurry and recycled in the process following precious metal removal and reactivation through chemical and thermal means.
Class 1 - High ificance Environmental Incident. An incident that causes ificant negative impacts on human health or the environment, or an incident that extends onto publicly accessible land and has the potential to cause ificant adverse impact to surrounding communities, livestock or wildlife.
Class 2 - Medium ificance Environmental Incident. An incident that has the potential to cause negative impact on human health or the environment but is reasonably anticipated to result in only localized and short-term environmental or community impact requiring minor remediation.
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A product from a mineral processing facility, such as gravity separation or flotation, in which the valuable constituents have been upgraded and unwanted gangue materials rejected as waste. Contained ounces. A measure of in-situ or contained metal based on an estimate of tonnage and grade. A unit operation that reduces the size of material delivered as run of mine ore for further processing. A method of stoping in which ore is removed in slices or lifts, and then the excavation is filled with rock or other waste material backfillbefore the subsequent slice is extracted.
Cut-off grade. A calculated minimum metal grade at which material can be mined and processed at break-even cost. Work carried out for the purpose of preparing a mineral deposit for production. In an underground mine, development includes shaft sinking, crosscutting, drifting and raising. The effect of waste or low-grade ore which is unavoidably included in the mined ore, lowering the recovered grade.
A horizontal tunnel generally driven within or alongside an orebody and aligned parallel to the long dimension of the ore.
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A method of underground mining used for flat-lying mineralization or where ground conditions are less competent. Core : a drilling method that uses a rotating barrel and an annular-shaped, diamond-impregnated rock-cutting bit to produce cylindrical rock cores and lift such cores to the surface, where they may be collected, examined and assayed.
Reverse circulation : a drilling method that uses a rotating cutting bit within a double-walled drill pipe and produces rock chips rather than core. Air or water is circulated down to the bit between the inner and outer wall of the drill pipe. The chips are forced to the surface through the center of the drill pipe and are collected, examined and assayed. Conventional rotary : a drilling method that produces rock chips similar to reverse circulation except that the sample is collected using a single-walled drill pipe.
Air or water circulates down through the center of the drill pipe and returns chips to the surface around the outside of the pipe. In-fill : the collection of additional samples between existing samples, used to provide greater geological detail and to provide more closely-spaced assay data.
Prospecting, sampling, mapping, diamond-drilling and other work involved in locating the presence of economic deposits and establishing their nature, shape and grade. A process that concentrates minerals by taking advantage of specific surface properties and applying chemicals such as collectors, depressants, modifiers and frothers in the presence of water and finely dispersed air bubbles.
The concentration of an element of interest expressed as relative mass units percentage, parts per million, ounces per ton, grams per tonne, etc. Grinding Milling. Involves the size reduction of material fed to a process plant though abrasion or attrition to liberate valuable minerals for further metallurgical processing. Heap leaching.
A process whereby precious or base metals are extracted from stacked material placed on top of an impermeable plastic liner and after applying leach solutions that dissolve and transport valuable metals for recovery in the process plant. A mineral deposit, consisting of a zone of veins, veinlets or disseminations, in consolidated rock as opposed to a placer deposit. Long-hole open stoping. A method of underground mining involving the drilling of holes up to 30 meters or longer into an ore bearing zone and then blasting a slice of rock which falls into an open space.
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The broken rock is extracted and the resulting open chamber may or may not be back filled with supporting material. Mega-annums each mega-annum, one million years. Metric conversion. Troy ounces. Troy ounces per short ton.
A facility where ore is finely ground and thereafter undergoes physical or chemical treatment to extract the valuable metals. Mineral reserve. The economically mineable portion of a measured or indicated mineral resource demonstrated by at least a preliminary feasibility study. This study must include adequate information on mining, processing, metallurgical, economic and other relevant factors that demonstrate, at the time of reporting, that economic extraction can be justified. A mineral reserve includes diluting materials and allowances for losses that may occur when the material is mined.
Mineral reserves are sub-divided in order of increasing confidence into probable mineral reserves and proven mineral reserves. Probable mineral reserve : the economically mineable portion of an indicated and, in some circumstances, a measured mineral resource demonstrated by at least a preliminary feasibility study. Proven mineral reserve : the economically mineable part of a measured mineral resource demonstrated by at least a preliminary feasibility study.
This study must include adequate information on mining, processing, metallurgical, economic and other relevant factors that demonstrate, at the time of reporting, that economic extraction is justified. Mineral resource. The location, quantity, grade, geological characteristics and continuity of a mineral resource are known, estimated or interpreted from specific geological evidence and knowledge.
Mineral resources are sub-divided, in order of increasing geological confidence, into inferred, indicated and measured. Inferred mineral resource : that part of a mineral resource for which quantity and grade or quality can be estimated on the basis of geological evidence, limited sampling and reasonably assumed, but not verified, geological and grade continuity.
The estimate is based on limited information and sampling gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes. Indicated mineral resource : that part of a mineral resource for which quantity, grade or quality, densities, shape and physical characteristics can be estimated with a level of confidence sufficient to allow the appropriate application of technical and economic parameters to support mine planning and evaluation of the economic viability of the deposit.
The estimate is based on detailed and reliable exploration and testing information gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes that are spaced closely enough for geological and grade continuity to be reasonably assumed. Measured mineral resource : that part of a mineral resource for which quantity, grade or quality, densities, shape and physical characteristics are so well-established that they can be estimated with confidence sufficient to allow the appropriate application of technical and economic parameters to support production planning and evaluation of the economic viability of the deposit.
The estimate is based on detailed and reliable exploration, sampling and testing information gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes that are spaced closely enough to confirm both geological and grade continuity. The presence of a target mineral in a mass of host rock.
Mining claim. A footprint of land that a party has staked or marked out in accordance with applicable mining laws to acquire the right to explore for and, in most instances, exploit the minerals under the surface.