The United States Geological Survey has all kinds of wonderful resources, including:
Historical Topo Maps which may be downloaded (free!)
The goal of The National Map’s Historical Topographic Map Collection (HTMC), which started in 2011, is to provide a digital repository of USGS 1:250,000 scale and larger maps printed between 1884, the inception of the topographic mapping program, and 2006.
Here’s a report from 1979 on the mineral resources of Aravaipa Canyon:
USGS Report on Mineral Resources of Aravaipa Canyon 1979
The Arizona Geological Survey also has a lot of interesting information. Here are some examples: