TY - JOUR
T1 - Lead isotope results of acid leaching experiments on acid volcanics and black shales in an ore environment
AU - Gulson, Brian L.
PY - 1977
Y1 - 1977
N2 - In the volcanogenic Woodlawn Cu-Pb-Zn deposit, where pyrite is the dominant sulphide phase in the ore and a ubiquitous mineral in the host volcanics and shales, leaching experiments using HNO3-HCl to overcome the ore/rock lead dominance, resulted in highly complex lead isotopic data, dependent mainly on the original lead concentration in the rock. for samples with higher (> 5ppm) lead concentrations, the acid leaches are less radiogenic than the rocks or residues whereas for samples with >5ppm lead, the acid leaches are more radiogenic than the rocks or residues. In those samples with > 15ppm lead, the data arrays are those expected for a dominance of ore/rock lead. In all except the very high lead samples (> 100ppm), lead is derived from sources other than sulphides. Furthermore, in only the highest lead sample is the acid leach isotopic value compatible with that of the ore lead. As found in previous leaching investigations, the dominant component of lead and uranium is extracted in the acid leach. Acid-leaching experiments of this type may have possible applications in prospecting for basemetal sulphides.
AB - In the volcanogenic Woodlawn Cu-Pb-Zn deposit, where pyrite is the dominant sulphide phase in the ore and a ubiquitous mineral in the host volcanics and shales, leaching experiments using HNO3-HCl to overcome the ore/rock lead dominance, resulted in highly complex lead isotopic data, dependent mainly on the original lead concentration in the rock. for samples with higher (> 5ppm) lead concentrations, the acid leaches are less radiogenic than the rocks or residues whereas for samples with >5ppm lead, the acid leaches are more radiogenic than the rocks or residues. In those samples with > 15ppm lead, the data arrays are those expected for a dominance of ore/rock lead. In all except the very high lead samples (> 100ppm), lead is derived from sources other than sulphides. Furthermore, in only the highest lead sample is the acid leach isotopic value compatible with that of the ore lead. As found in previous leaching investigations, the dominant component of lead and uranium is extracted in the acid leach. Acid-leaching experiments of this type may have possible applications in prospecting for basemetal sulphides.
UR - http://www.scopus.com/inward/record.url?scp=85010089369&partnerID=8YFLogxK
U2 - 10.2343/geochemj.11.239
DO - 10.2343/geochemj.11.239
M3 - Article
AN - SCOPUS:85010089369
SN - 0016-7002
VL - 11
SP - 239
EP - 245
JO - GEOCHEMICAL JOURNAL
JF - GEOCHEMICAL JOURNAL
IS - 4
ER -