Quantifying Favorableness for
Occurrence of a
Mineral Deposit Type
Using Fuzzy Logic—
An Example from Arizona
By Mark E. Gettings and Mark W. Bultman
U.S. Geological Survey Open-File Report 93-0392
This publication applies the quantitative theory of possibility to
the existence of silver-lead vein-type deposits in southeastern Arizona
using fuzzy set techniques. The methods of fuzzy logic are used to produce
a map of favorableness estimation for this deposit type, which can be used
to help in mineral resource estimations.
Originally published in 1993, this report is presented here in
Portable Document Format. Adobe Acrobat Reader 3.0™ is
required to view it. If you already have Acrobat Reader 3.0
installed on your computer, click here to access the text (2.3 Mb).
If you wish to download Acrobat Reader 3.0 free of charge, click here.
For more information about this report contact William D. Heran at wheran@usgs.gov
