Journal article

Continental setting inferred for emplacement of the 2.9-2.7 Ga Belingwe Greenstone Belt, Zimbabwe

R Bolhar, JD Woodhead, JM Hergt

GEOLOGY | GEOLOGICAL SOC AMERICA, INC | Published : 2003

Abstract

New major element, trace element, and Nd isotope data are reported for volcanic rocks from the 2.9 Ga Lower Greenstone and 2.7 Ga Upper Greenstone assemblages of the Belingwe Greenstone Belt. The majority of samples from five distinct stratigraphic units have generally unfractionated to slightly depleted trace element patterns similar to those observed in the small number of previous studies. However, previously unrecognized incompatible element-enriched samples with distinct high field strength anomalies invariably also occur in close association. These are reminiscent of crustally contaminated rocks from other well-documented greenstone settings. Numerical modeling of combined assimilation..

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