@ARTICLE{Nieć_Marek_Geological_2002,
 author={Nieć, Marek},
 number={No 4},
 journal={Gospodarka Surowcami Mineralnymi - Mineral Resources Management},
 pages={5-19},
 howpublished={online},
 year={2002},
 publisher={Komitet Zrównoważonej Gospodarki Surowcami Mineralnymi PAN},
 publisher={Instytut Gospodarki Surowcami Mineralnymi i Energią PAN},
 abstract={Mineral deposit is commonly defined as natural accumulation of mineral commodity that can be economically mined. The existing classification of resources and reserves as for example United Nations Framework Classification (UNFCR) or JORC Code have adopted the uniform definitions of particular their categories, but do not touch the problem how the mineral deposit itself is defined. If global estimates of resources are composed or comparisons, made the criteria defining mineral deposits and their resources and reserves should be simultaneously presented to avoid miscomparisson of not comparable items. The criteria defining mineral deposit and its resorces commonly used are: - the greatest depth oflocation (or the greatest allowable stripping ration ifdeposit is located close to the surface, suitable for opencast mining), - cut off values ofmineral quality parameters, - the lowest acceptable deposit thickness, - the lowest acceptable mineral accumulation, defined as amount of mineral per square meter surface. There are no natural values ofsuch criteria that can be used for delineation ofthe mineral deposit and they should be arbitrally selected. At opportunity study stage, threefold approach can be proposed for finding them: 1) based on analogy, considering the data from existing mines and mining projects, 2) based on rough economic estimates considering reported costs and values ofmineral commodities, 3) based on general data on applicable mining and mineral processing technology standards considering mining safety rules and marketable mineral quality standards. Such mode of defining mineral deposit and its resources is ilustrated by copper ore deposit example.},
 type={article},
 title={Geological criteria defining mineral deposit},
 URL={http://ochroma.man.poznan.pl/Content/132602/PDF/3_GSM_18_4_2002_Niec_Geological.pdf},
 keywords={mineral deposits, resources, cut off parameters},
}