Nevada Bureau of Mines and Geology - University of Nevada, Reno

Summary of Work Performed
Mineral Inventory Paradise-Denio and Sonoma Gerlach (Winnemucca District)
Resource Areas
Contract #YA-553 CTI-1058
U.S. Bureau of Land Management
Work was completed on the Winnemucca District Mineral Resource
Inventory in two complementary stages. First, search of the literature was
made, and data on mineral occurrences within the project area were
compiled on short form Nevada CRIB forms. All of the information was
plotted on maps for field use. Folios were then prepared for each mining
district, which included the CRIB forms, notes on mining claims, and
pertinent references. This material provided the basis for planning the
second stage of the inventory, the field examinations.
During the field stage of the project, mining districts within the
Resource area were visited and selected properties were examined.
Important properties as well as outlying prospects were examined and
described in order to provide more complete and accurate information on
the occurrences beyond that provided in the literature. During the
examination, emphasis was placed on collecting geologic information on the
mineral occurrences and on noting current activity.
Photos were taken in each area to document activity, type of mine
workings, and geologic relationships. In addition, samples showing typical
mineralization were collected from most of the visited properties. All of
the samples were high-graded and usually taken from dumps, ore piles, or
outcrops. Some samples of nearby intrusive rock or altered material were
collected for comparison purposes.
The samples were prepared for analysis by the Nevada Analytical
Laboratory, UNR, Reno, and analyzed for 31 elements (semi-quantitative
spectrographic technique) by the Branch of Exploration Geochemistry, U.S.
Geological Survey, Denver, Colorado. The analytical work was done through
a cooperative agreement between the Branch of Exploration Geochemistry and
the Nevada Bureau of Mines and Geology.
The information collected during the course of the Winnemucca project
has heen compiled and is presented in this report in the following form:
1) Summary report organized by mining district: includes location,
history, field observations, and current mining status of each
district. A list of selected references follows each individual
district write-up. Sample description sheets and results of
geochemical analysis are included in the appendix of the report.
2) Mining District folios:
a) Prospect forms describing each mine property examined in the
field. Sample descriptions accompany forms of sampled
properties.