Geochemical data for intrusive rocks sampled in northwestern Utah and adjacent states

This release of whole-rock geochemical data for northwestern Utah and adjacent Idaho and Nevada is for unaltered intrusive rocks sampled and analyzed from 1980 to 2023. The rocks range in age from Archean to Cenozoic. Most samples represent plutons, stocks, and dikes of Mesozoic and Cenozoic age. A few older igneous and metamorphic rocks are included. The data support several map publications by the U.S. Geological Survey, Utah Geological Survey and Nevada Bureau of Mines and Geology.

The data release includes new, previously unpublished data as well as results for USGS-processed samples that are publicly available through the USGS National Geochemical Database: Rock (NGD-Rock) website. This data release supersedes and improves on the data available for download from the NGD-Rock website by: consolidating all analytical data for a sample from multiple tables into one table, correcting or improving sample locations, correcting typographic errors in sample numbers, updating descriptive information, and adding samples and/or data for samples that are missing from the online NGD-Rock files.
 
Samples were analyzed by three analytical laboratories and are grouped by laboratory since each laboratory used different instruments and analytical methods. Refer to "Child Items" section below to access data. Within USGS, in-house analytical labs were used on many samples, after which USGS used contract labs. In addition, contract labs were used by Utah Geological Survey.

Symbol colors on browse graphic match those used for the browse graphic for each child item.