The deposit models project is an attempt to classify the many known metallic mineral deposits and occurrences in Yukon into specific mineral deposit models. This work began with the initiation of regional mineral potential assessments by the Yukon government (e.g., Bradshaw and vanRanden, 2004). The quantitative method used for regional mineral assessments in Yukon is based on a method developed by the United States Geological Survey (USGS), which uses the mineral deposit models of Cox and Singer (1986). The reader is encouraged to consult this reference for further discussion on the fundamental purpose for defining mineral deposit models. In general terms, resource assessments require that tracts of land be assessed on the basis of probability for the occurrence of one or more specific deposits of a particular type with previously defined grades and tonnages. In the course of conducting regional mineral potential assessments, grade and tonnage information for deposit types that occur or potentially could occur in Yukon was compiled, grade and tonnage curves were constructed, and deposit models were assigned to known mineral deposits and occurrences (i.e., Yukon MINFILE occurrences; Deklerk, 2003).