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Glossary

The following is a glossary of terms used throughout the site:
A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z  
C
Carbon-in-leach

A recovery process in which a slurry of gold ore, carbon granules and cyanide are mixed together. The cyanide dissolves the gold content and the gold is absorbed on the carbon; the carbon is subsequently separated from the slurry for further gold removal.

 
Carbon-in-pulp

Similar to carbon-in-leach process, but initially the slurry is subjected to cyanide leaching in separate tanks followed by carbon-in-pulp. Carbon-in-leach is a simultaneous process.

 
Cyanidation

A method of extracting gold or silver by dissolving it in a weak cyanide solution. In the operational flow chart at the Toroparu Gold-Copper Property, cyanide use is mitigated by cyanide destruction.

 
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D
Dilution

The effect of waste or low-grade ore being included unavoidably in the mined ore, lowering the recovered grade.

 
Doré

Unrefined gold and silver bullion bars, which will be further refined to almost pure metal.

 
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G
Gold equivalent production

Gold equivalent for copper production is calculated on a copper to gold ratio based on metal recoveries, selected metal prices, and the projected contribution of revenue attributable to copper relative to gold.

 
Grade

The amount of valuable metal in each tonne of ore, expressed as grams per tonne for precious metals.

Cut-off grade - is the minimum metal grade at which a tonne of rock can be processed on an economic basis.

Recovered grade - is actual metal realized by the metallurgical process and treatment of ore based on actual experience or laboratory testing.

Reserve grade - is the estimated mass weighted average metal content of an ore body based on reserve calculations.

 
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H
Heap leaching

A process whereby gold is extracted by "heaping" broken ore on sloping impermeable pads and repeatedly spraying the heaps with a weak cyanide solution which dissolves the gold content. The gold-laden solution is collected for gold recovery.

 
Hectares

One hectare = 2.47 acres

 
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K
Kilometre

One kilometer = 0.62 miles

 
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M
Metre

One metre = 3.28 feet

 
Mill

Physical plant where ore is ground fine and undergoes physical or chemical treatment to extract the valuable metals.

 
Mineralized material

Mineralized material is the projection of mineralization in rock based on geological evidence and assumed continuity. It may or may not be supported by sampling but is supported by geological, geochemical, geophysical or other data. This material may or may not have economically recoverable mineralization.

 
Mining claim

That portion of public or private mineral lands which a party has staked or marked out in accordance with federal, provincial or state mining laws to acquire the right to explore for and exploit the minerals under the surface.

 
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N
NSR

Net smelter return (NSR) - a share of the net revenues generated from the sale of metal produced by a mine.

 
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O
Ore

Rock, generally containing metallic and non-metallic minerals that can be mined and processed at a profit.

 
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R
Reclamation

The process by which lands disturbed as a result of mining activity are reclaimed back to a beneficial land use. Reclamation activity includes the removal of buildings, equipment, machinery and other physical remnants of mining, closure of tailings impoundments, leach pads and other mine features, and contouring, covering and re-vegetation of waste rock piles and other disturbed areas.

 
Recovery

A term used in process metallurgy to indicate the proportion of valuable material obtained in the processing of an ore. It is generally stated as a percentage of valuable metal in the ore that is recovered compared to the total valuable metal present in the ore.

 
Refining

The final stage of metal production in which impurities and precious metals coal, and industrie minerals are removed from the molten metal.

 
Reserves

Mineral Reserves are sub-divided in order of increasing confidence into Probably Mineral Reserves and Proven Mineral Reserves. A Probable Mineral Reserve has a lower level of confidence than a Proven Mineral Reserve.

'Mineral Reserve': Is the economically mineable part 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..

'Probable Mineral Reserve': Is the economically mineable part of an Indicated, and in some circumstances, 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 can be justified.

'Proven Mineral Reserve': Is 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.

The above definitions of "mineral reserve", "proven mineral reserve", and "probable mineral reserve", conform to Canadian Institute of Mining, Metallurgy and Petroleum ("CIM") definitions as defined in the CIM Standards on Mineral Resources and Reserves - Definitions and Guidelines as required by National Instrument 43-101 of the Canadian Securities Administrators, Standards of Disclosure for Mineral Projects.

Resources

Mineral resources are sub-divided, in order of increasing geological confidence, into Inferred, Indicated and Measured categories: An Inferred Mineral Resource is that part of a Mineral Resource for which quantity and grade or quality can be estimated on the basis of geological evidence and limited sampling and reasonable 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.

'Mineral Resource': Is a concentration or occurrence of diamonds, natural, solid inorganic, or fossilized organic material including base and precious metals, coal, and industrial minerals in or on the Earth's crust in such form or quantity and of such grade or quality that it has reasonable prospects for economic extraction. The location, quantity, grade, geological characteristics and continuity of a Mineral Resource are known, estimated or interpreted from specific geological evidence and knowledge.

'Indicated Mineral Resource': Is 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': Is 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 above definitions of "mineral resource", "measured mineral resource", and "indicated mineral resource" conform to Canadian Institute of Mining, Metallurgy and Petroleum ("CIM") definitions as defined in the CIM Standards on Mineral Resources and Reserves - Definitions and Guidelines as required by National Instrument 43-101 of the Canadian Securities Administrators, Standards of Disclosure for Mineral Projects.

 
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S
Sedimentary rock

Rocks formed from material derived generally by erosion of other rocks and laid down by a chemical or mechanical process i.e., limestone, shale and sandstone.

 
Stockpile

Broken ore heaped on surface or prepared areas underground, pending treatment or shipment.

 
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T
Tailings

The material that remains after all metals considered economic have been removed from ore during milling.

 
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V
Volcanic rock

Rocks formed as a result of ancient volcanic activity and deposited in various textures and compositions, generally defined by silica content.

 
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  • Toroparu Preliminary Assessment

    PEA Highlights

    • 5 M oz of gold in preliminary mine plan
    • $2.6 billion life of mine operating and $1.7 billion pre-tax free cash flow at three-year trailing average gold price of $1,255/oz. effective December 31, 2011
      • • $750 million cumulative cash flow during first five years of production
      • • Pre-production capital costs of $482 million through development of more capital efficient operation for the first five years of mine life
    • Average net cash costs including royalties of $450/oz. gold in first five years of operation and $600/oz. gold over the 14-year mine life
    • Pre-tax and post-royalty net present value (discounted at 5%) of $805 million and pre-tax internal rate of return of 21%
      • • After tax net present value (discounted at 5%) of $540 million and after tax internal rate of return of 18%
      • • Life of mine projected production of 4.3 M oz of gold and 262 M lbs of by-product copper
  • Exploration Upside

    Exploration Upside

    • Infill drilling in progress for Toroparu resource definition
    • Step-out and exploration drilling in progress for resource growth
    • Strong potential to make new discoveries of 1000 square kilometer land package
    • 300 square kilometer geochemical survey nearly complete
    • Exploration team led by team that has made several key discoveries of gold deposits that have led to production in West Africa
    • Senior exploration management living in Guyana
  • Potentially Mineable Resources

    Potentially Mineable Resources

    • Potentially Mineable Portion of the Mineral Resource at an average cut-off grade of 0.54 g/t Au1, 2, 3

      Potentially Mineable Classification Tonnes (000’s) Au g/t Au oz (000’s) Cu % Cu (M lbs)
      Saprolite Measured 2,213 0.73 52 0.05 2
      Saprolite Indicated 5,008 0.67 108 0.04 4
      Saprolite Measured & Indicated 7,221 0.69 160 0.04 6
      Saprolite Inferred 5,240 0.56 94 0.04 5






      Fresh Rock Measured 20,567 1.24 820 0.14 64
      Fresh Rock Indicated 75,213 1.03 2,491 0.10 166
      Fresh Rock Measured & Indicated 95,780 1.07 3,311 0.11 230
      Fresh Rock Inferred 13,125 0.97 409 0.07 20






      Fresh Rock Stockpile Measured & Indicated 69,899 0.39 876 0.07 108
      Fresh Rock Stockpile Inferred 17,537 0.37 209 0.05 19






      Total Measured & Indicated 172,900 0.78 4,347 0.09 344
      Total Inferred 35,902 0.62 712 0.05 44

      1 The potentially mineable mineral resources are reported at an average cut-off grade of 0.54 g/t gold which is intentionally elevated above an optimized cut-off grade of 0.28 g/t Au)used to determine the in-pit optimized resource estimate for the Property to enhance the economics of production.

      2 Mineral resources, which are not mineral reserves, do not have demonstrated economic viability. Environmental, permitting, legal, title, taxation, sociopolitical, marketing, or other relevant issues may materially affect the estimate of mineral resources. The quantity and grade of reported Inferred resources in this estimation are uncertain in nature and there has been insufficient exploration to define these Inferred resources as an Indicated or Measured mineral resource and it is uncertain if further exploration will result in upgrading them to an indicated or measured mineral resource category.

      3 The potentially mineable portion of the mineral resource estimate was prepared by Eugene Puritch, P. Eng (PEO #100014010) of P&E Mining Consultants Inc. Mineral resource estimates reported in this press release were estimated using the Canadian Institute of Mining, Metallurgy and Petroleum (CIM), Standards on Mineral Resources and Reserves, Definitions and Guidelines prepared by the CIM Standing Committee on Reserve Definitions.

  • Why Sandspring?

    Why Sandspring?

    • Rapidly developing the Toroparu Gold Deposit, Guyana’s largest mineral resource
    • Working toward Large-scale Commercial Production for 5 M oz potentially mineable resource
      • • Environmental authorization pending
      • • Pre-feasibility study scheduled in Q3 2012
    • Potential to add to mineable resources through resource growth and definition drilling
    • Highly Accomplished board and management with senior producer experience and large ownership interest
    • Operational capacity to support both exploration and development
    • Sufficient cash available to continue to advance project