40 Ar/39 Ar Age-Spectrum Data for Hornblende, Biotite, White Mica, and K-Feldspar Samples From Metamorphic Rocks in the Great Smoky Mountains of North Carolina And Tennessee

摘要

This report contains reduced 40Ar/39Ar data of hornblende, biotite, white mica and (or) sericite, and potassium-feldspar mineral separates and phyllite groundmass samples from metamorphic rocks of the Great Smoky Mountains in North Carolina and Tennessee. Included in this report are information on the location of the samples and a brief description of the samples. The data contained herein are not interpreted in a geological context, and care should be taken by users unfamiliar with argon isotopic data in the use of these results. No geological meaning is implied for any of the apparent ages presented below, and many of the individual apparent ages are not geologically meaningful. This report is primarily a detailed source document for subsequent publications that will integrate these data into a geological context. All the samples in this report were collected in and around the Great Smoky Mountain National Park in western North Carolina and eastern Tennessee. Table 1 is a listing of the location of all the samples and includes the sample number, the U.S. Geological Survey (USGS) 7.5-minute quadrangle that the sample is located in, the material dated, and the latitude and longitude of the sample site. In general, the samples are listed by mineral and (or) sample type and date of collection.