Paleomagnetic studies of bulk mineral separates from the Bark Lake diorite, Ontario

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Abstract
The separation of superimposed stable remanent magnetizations, increasingly a problem in the study of paleomagnetism of metamorphosed terrains, has usually been attempted using indirect techniques such as vector subtraction. In the coarse-grained Bark Lake diorite of the Grenville Province, two stable and one unstable component, often superimposed in individual samples, are shown to reside in different rock-forming mineral fractions. They are directly separated by orienting small aggregates of dark or light grains and are measured and demagnetized using standard paleomagnetic equipment.

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