Figure F94. A. Median destructive field derived from AF NRM demagnetization of discrete samples of ultramafics (white bars) and gabbros (shaded bars). B. NRM unblocking temperature distribution from ultramafics with variable degrees of alteration (dashed lines) and gabbros (solid lines). Increasing degree of talc alteration of the serpentinized peridotite samples correlates with higher unblocking temperatures.

Figure F94. A. Median destructive field derived from AF NRM demagnetization of discrete samples of ultramafics (white bars) and gabbros (shaded bars). B. NRM unblocking temperature distribution from ultramafics with variable degrees of alteration (dashed lines) and gabbros (solid lines). Increasing degree of talc alteration of the serpentinized peridotite samples correlates with higher unblocking temperatures.