Three stable magnetization components A, B, and C have been isolated from a set of dikes that have been collectively referred to as the Molson swarm. Positive baked contact tests and square-shouldered thermal decay curves indicate that these components were acquired during three periods of dike emplacement. Dikes carrying A with a pole at 15.4 ¿N and 96.5 ¿W (A95=4.1¿, N=16 sites) have been dated by the U-Pb method at 1883 Ma and are closely related to the Paleoproterozoic Trans-Hudson Oregon. Ages of B with a pole at 27.1 ¿N and 140.8 ¿W (A95=3.8¿, N=30) and C with a pole at 40.7 ¿N and 156.3 ¿W (A95=9.7¿, N=19) are estimated at 2170--2120 Ma, on the basis of paleomagnetic characteristics that are distinct from the A component, the analysis of metamorphic history of the Pikwitonei Domain, and comparison with well-dated paleomagnetic poles from mafic igneous rocks in the Superior Province. The associated B and C dikes were emplaced in normal and reversed geomagnetic fields when the northwestern margin of the Superior Province experienced initial rifting prior to the Trans-Hudson Orogen. These earlier dikes may correlate with known 2094 Ma mafic magmatism documented in the lower Hurwitz Group of the Hearne Province. A stable magnetization component D with a pole at 20.9 ¿N and 133.6 ¿W (A95=7.6¿, N=30 samples) was also identified from unbaked granulites throughout the Pikwitonei Domain. This component predates all dike intrusion in the region, has an age range of 2200--2170 Ma, and may have been caused by earlier uplift of the northwestern Superior Province. ¿ American Geophysical Union 1994