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National Geochemical Survey


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As

Au, Pd, Pt

C, S

ICP40

ICP16

ICP10

Hg

NAA

Sb

Se

Te, Tl

W

XRF

NURE

Neutron Activation Analysis (NAA)

Two different multielement instrumental neutron activation analysis (INAA) methods are represented in this data set, one done at the USGS laboratories in Denver, the other at Becquerel Laboratories in Mississauga, Ontario, Canada. These methods are described below. For records indicating analysis at BOTH labs, all reported values were determined at the USGS except Ti, Mo, and Br, which were determined at Becquerel. In addition to these two methods, a small number of samples were analyzed by delayed neutron (DN) activation analysis. This method is also described below.

Methods