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

Sample Detail

Sample Number L82_1686
Project Livengood 1980s

Sample Documentation

Analyses [Download All]

Reference Number FA04030732
Reference Date 2004-06-22
Citation RDF 2005-4
Laboratory ALS Chemex
Description The original pulps were prepared at the DGGS Geochemical Laboratory in 1982 by air-drying before screening at minus-80 mesh. In 2004, 287 stream sediment samples were submitted from storage. 287 samples were analyzed for gold using Atomic Absorption Spectroscopy after Fire Assay Fusion. 287 samples were analyzed for mercury by Cold Vapor Atomic Absorption Spectroscopy after HCl:HNO3 (3:1) acid digestion. All other geochemical analyses on the 30 samples were performed, after HF-HNO3-HClO4 acid digestion with a HCl leach, by either Inductively Coupled Plasma - Atomic Emission Spectroscopy, Inductively Coupled Plasma - Mass Spectroscopy, or a combination of Inductively Coupled Plasma - Atomic Emission Spectroscopy and Inductively Coupled Plasma - Mass Spectroscopy. Results were corrected for spectral interelement interferences. The HF-HNO3-HClO4 acid digestion with a HCl leach method of digestion is possibly incomplete for certain elements and may result in lower analytical results.
Sample Type stream sediment

Reference Number RI83-1-table1-DGGS-Bondar-Clegg
Reference Date 1982-12-01
Citation RI 83-1
Laboratory Alaska Division of Geological & Geophysical Surveys
Description Stream sediment samples were prepared at the DGGS Geochemical Laboratory by air-drying before screening at minus-80 mesh. Some samples were analyzed at the DGGS Geochemical Laboratory for copper, zinc, lead, silver, antimony, molybdenum, cadmium, and arsenic using Atomic Absorption Spectroscopy after HCl:HNO3 (3:1) acid digestion. Other samples were analyzed for copper, zinc, cobalt, nickel, iron, manganese, cadmium, chromium using Inductively Coupled Plasma - Atomic Emission Spectroscopy after HCl:HNO3 (3:1) acid digestion. Some results may be below the lower limit for that element and method. Bondar-Clegg performed analyses on 118 stream sediment samples for copper and zinc using Atomic Absorption Spectroscopy.
Sample Type stream sediment