title: Copper artifacts: correlation with source types of copper ores.
abstract: 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.
authors.forename: A M
authors.initials: AM
authors.lastname: Friedman
authors.forename: M
authors.initials: M
authors.lastname: Conway
authors.forename: M
authors.initials: M
authors.lastname: Kastner
authors.forename: J
authors.initials: J
authors.lastname: Milsted
authors.forename: D
authors.initials: D
authors.lastname: Metta
authors.forename: P R
authors.initials: PR
authors.lastname: Fields
authors.forename: E
authors.initials: E
authors.lastname: Olsen