Abstract
125 whole rock samples from the productive Marysville, Montana, granodiorite and the surrounding metamorphic rocks were analyzed by neutron activation analysis for gold and silver, and by atomic absorption for copper, lead and zinc. In the vicinity of known gold veins, anomalous values for gold and silver were found in both types of bedrock. Anomalies for the base metals were much less pronounced. The results indicate that systematic analysis of igneous bodies could be useful in exploration for hydrothermal ore deposits.
Zusammenfassung
125 Gesteinsproben des sogenannten „produktiven“ Granodiorits in Marysville (Montana) wurden durch Neutronenaktivierungsanalyse auf Gold und Silber und mittels Atomabsorptionsanalyse auf Kupfer, Blei und Zink analysiert. In der Nähe bekannter Goldadern wurden in beiden Gesteinsarten ungewöhnlich hohe Gold- und Silber-Werte gefunden. Anomale Werte für Kupfer, Blei und Zink waren seltener. Die Ergebnisse zeigen, daß eine systematische Untersuchung magmatischer Gesteinskomplexe bei der Suche nach hydrothermalen Erzlagerstätten von Nutzen sein kann.
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Mantei, E., Bolter, E. & Al Shaieb, Z. Distribution of gold, silver, copper, lead and zinc in the productive Marysville stock, Montana. Mineral. Deposita 5, 184–190 (1970). https://doi.org/10.1007/BF00208062
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DOI: https://doi.org/10.1007/BF00208062