State of Alaska Alaska | Natural Resources DNR | Geological & Geophysical Surveys DGGS | Geochemistry Geochem

Sample Detail

Sample Number 07RL021B
Project Northeastern Fairbanks Mining District, Circle Quadrangle

Sample Documentation

Analyses [Download All]

Reference Number FA07095130
Reference Date 2007-10-22
Citation RDF 2008-1 v. 1.0.1
Laboratory ALS Chemex
Description 135 rock samples were crushed with a Terminator oscillating jaw crusher with chrome steel alloy plates so that at least 70 percent of the material passes through a -10 mesh (2 mm) screen. Representative aliquots of 250 grams each were taken using a stainless steel riffle splitter. These samples were then pulverized in a chrome steel ring mill so that 85 percent of the sample passed through a -200 mesh (75 micron) screen. Trace-element analyses and the gold analyses were performed using representative splits of each 250 gram pulp. 135 samples were assayed for gold by inductive coupled plasma-atomic emission spectroscopy following a 30g fire assay fusion (FA-ICP), after four-acid, near-total digestion. Trace-element geochemical analyses were performed by inductive coupled plasma-atomic emission spectroscopy (ICP-AES) methods after four-acid, near-total digestion. This method of digestion is possibly incomplete for some elements and may result in lower analytical results for these elements. See publication for a listing of these elements.
Sample Type rock