Significance of the precambrian Basement and Late Cretaceous Thrust Nappes on the Location of Tertiary Ore Deposits in the Oquirrh Mountains, Utah.

摘要

Some descriptions of the geology of individual parts of the range are as much as 1 to 12 decades old. The most recent discussion of the geology of the Oquirrh Mountains as a whole by Butler (1920) is more than 75 years old. However, there are a number of more recent geologic descriptions of local (mining) areas in the range. These are published in field trip guides, mining company reports, and are in university faculty and student theses. This report is the author's updated evaluation of the regional geology of the Oquirrh Mountains area; it also considers some of the controversial not fully resolved differences from past geologic analyses. The report primarily describes and summarizes the regional geologic relations observed by USGS maps of all or parts of fourteen 7 1/2-min. quadrangles (at a 1:24,000 scale), which include the Oquirrh Mountains. A compilation of these maps by Tooker, and Roberts (1998) at 1:50,000 scale provides the geologic foundation for the author's assessment of the geological occurrence of ore deposits in the Oquirrh Mountains.