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

Sample Detail

Sample Number 62ABa2424A

Sample Documentation

Analyses [Download All]

Reference Number OFR77-631-MO-recalc
Reference Date 1991-08-01
Citation RI 91-3
Laboratory Alaska Division of Geological & Geophysical Surveys - Burns, Laurel E.
Description Some totals were recalculated to reflect changes in oxide percentages.
Sample Type rock

Reference Number OFR77-631-MO
Reference Date 1977-08-01
Citation OF 77-631
Laboratory Alaska Division of Geological & Geophysical Surveys - Shapiro, Leonard
Laboratory Number 163835
Description 9 rock samples were crushed then pulverized so that the material passed through a -100 mesh screen. 9 samples were analyzed for SiO2, Al2O3, Fe2O3, MnO, P2O5 and TiO2 using Spectrophotographic methods and 9 samples were analyzed for CaO, K2O, MgO and Na2O using Atomic Absorption Spectroscopy. Sample preparation/digestion is uncertain but followed either the one or two solution methods outlined in USGS Bulletin 1401 by Shapiro (1975). FeO was analyzed using titrimetric methods. H2O- values were acquired by heating methods. H2O+ values were acquired by calculating total water minus H2O-. CO2 values were acquired by its volume upon evolution with acid.
Sample Type rock

Reference Number RI91-3 Burns1989
Reference Date 1990-08-01
Citation RI 91-3
Laboratory Alaska Division of Geological & Geophysical Surveys - Burns, Laurel E.
Description CIPW norms for the major element analyses were calculated using a highly modified version of the basic program "Petcal" written for DOS in the BASIC programming language. The program was originally proposed by Bingler and others, 1976, Nevada Bureau of Mines and Geology Report 28 and modified by Richard Koch in 1983. Discriminant functions developed by Newberry and Burns (1989) using SAS statistical software were used to evaluate the gold potential of the samples. Some results may have been rounded off in the publication.
Sample Type rock

Reference Number RI91-3 FeO
Reference Date 1990-08-01
Citation RI 91-3
Laboratory Alaska Division of Geological & Geophysical Surveys
Description FeO % Total was calculated.
Sample Type rock