Abstract

100 Ma timing paradox of Archean gold, Abitibi greenstone belt (Canada): New evidence from U-Pb and Pb-Pb evaporation ages of hydrothermal zircons: Correction

Geology, v. 22, p. 1131–1134 (December 1994)

The lower half of p. 1133 should contain Figure 1, as shown here, instead of a repeat of Table 1.

Figure 1. A: Magmatic and thermal evolution of Abitibi southern volcanic zone (SVZ) and Superior province, and gold mineralization and resetting events (modified from Feng et al., 1992; Kerrich and Cassidy, 1994). M1 is first metamorphism, M2 is second metamorphism. Solid black bars are U-Pb and Pb-Pb ages on zircons; checker-pattern bars are U-Pb ages on rutile, scheelite, or titanite; black bars with diagonal white dotted lines are 40Ar/39Ar plateau apparent ages; black bars with vertical white lines are Sm-Nd mineral isochrons; vertical lines are Rb-Sr whole-rock isochron ages. Heavy vertical black lines are time spans of shoshonitic magmatism at terrane boundary structures marking accretion of allochthonous tectonostratigraphic terranes. B: Magmatic and thermal evolution and gold mineralizing events at specified localities elsewhere in Superior province, where mineralization is vigorously constrained by crosscutting dikes. Shoshonitic magmatism and gold mineralization are linked to accretion, albeit involving different processes.

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