Economic Geology; January 2005; v. 100; no. 1;
p. 43-61; DOI: 10.2113/100.1.0043
© Society of Economic Geologists
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FIG. 6. Representative photographs of the ore zone and the concentrations of
Pd in different rock types. Solid squares show the locations of samples used for
Pd analysis after the photographs were taken. The Pd value of the melanonorite
in the center of (C) is for a sample outside the field of view. The numbers in
parentheses correspond to the rock types described in the text. Rock hammer for
scale. A. Medium-grained melanogabbro breccia (2a) containing fragments of
earlier leucocratic rocks (1b-c) in the northern section of the southern Roby
zone. Note low concentrations of Pd in leucocratic rocks and a dike of late
barren clinopyroxenite (3a) cutting the melanogabbro breccia (2a). B. Magma
mingling between early leucogabbro (1d) and late melanogabbro (2c) from the
southern portion of the southern Roby zone. C. Magmatic brecciation of late
melanonorite (6) and earlier norite (5) in the Twilight zone.
Copyright © 2008 by Society of Economic Geologists
