Copper artifacts: correlation with source types of copper ores.
Six out of eight minor chemical elements, determined by spectroscopic and neutron-activation techniques, were found to be critical in computing a probability that a given copper artifact was derived from one of three types of copper ore: native metal, oxidized ore, reduced ore. Two elements, gold and tin, were apparently alloyed deliberately in many artifacts from both the Old World and the New World.
Friedman
A M
AM
Conway
M
M
Kastner
M
M
Milsted
J
J
Metta
D
D
Fields
P R
PR
Olsen
E
E