Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8865899 | Journal of Geochemical Exploration | 2018 | 72 Pages |
Abstract
In a vent-distal setting, the somewhat spurious metal anomalies of the hanging wall units can be difficult to distinguish from those of the favorable interval. The favorable stratigraphic interval can, however, be recognized by also taking into account that positive Zn anomalies are mainly coincident with positive anomalies in both K and Mn only in the favorable interval. Furthermore, samples from the favorable interval generally have Co/Niâ¯>â¯1 and display a positive Co/Ni vs. Zn trend, whereas samples of the pyrrhotite- and graphite-rich pelite have Co/Niâ¯<â¯1 and define a negative Co/Ni vs. Zn trend. Thus, the index (Co/Ni)*Zn allows easy detection of weak Zn anomalies associated with the stratiform Zn-Pb-Ag mineralization.
Keywords
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Authors
N.F. Jansson, A. Zetterqvist, R.L. Allen, L. Malmström,