Ore value-tonnage diagrams for resource assessment |
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| Authors: | Tetsuya Shoji Hiroaki Kaneda |
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| Institution: | (1) Department of Geosystem Engineering, School of Engineering, The University of Tokyo, Hongo 7-3-1, 113 Tokyo, Japan |
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| Abstract: | An ore value-tonnage diagram has been proposed for assessing mineral resources. Diagrams of W+Mo, and Pb+Zn deposits show
a good linearity between ore value and logarithms of cumulative ore tonnage. Diagrams of the massive sulfide, orthomagmatic,
placer, porphyry, replacement, and stratabound types are also linear. It is assumed, therefore, that deposits of each of these
commodities and these types belong to a single population. In contrast, the ore value-tonnage relations of all the deposits
analyzed here is approximated by the combination of two exponential functions. The same feature is seen for deposits of the
Cu+W+Mo, Cu+Pb+Zn, and Au+Ag commodities, and of the vein and unconformity-related types. This suggests that deposits belonging
to each of such categories are divided into the high and low value groups. We can expect, accordingly, to find high value
deposits of such categories. |
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| Keywords: | Ore-value tonnage diagrams mineral resources deposit models |
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