Analyses and descriptions of geochemical samples, northeastern part of the Dahlonega gold belt and vicinity, northeastern Georgia

Abstract

Semiquantitative spectrographic analyses for 30 elements, atomic absorption analyses for gold, copper, lead, and zinc, colorimetric analyses for arsenic and molybdenum, and instrumental analyses for mercury on all or part of a sample suite of 879 rock and saprolite samples are reported here in detail. In addition, Energy Dispersive X-ray Fluorescence analyses for a selected suite of 14 trace elements made on 146 of the samples are also reported. Most of the samples are saprolite derived from mica schist and gneiss, amphibolite, and quartzite, or vein quartz in saprolite. Samples of vein quartz generally contain some enclosing country rock. Samples are from roadcuts, surface and underground mine workings, and mine dumps. Locations are given by quadrangle and latitude and longitude. Sixty-seven percent of the samples from old mine areas and 24 percent from roadcuts contain gold at a limit of determination of 0.02 parts per million (ppm). Half of the mine samples and three-fourths of the roadcut samples that contain detectable gold have less than 0.2 ppm.