Fig. 6.
From: Paleointensity estimates from oceanic gabbros: Effects of hydrothermal alteration and cooling rate
Analysis of major magnetic hysteresis parameters of bulk rock samples and mineral separates. (a)–(c) Example of slope-corrected major hysteresis loop (open circles) and back field demagnetization of saturation remanence (filled circles) of (a) a bulk sample, (b) a plagioclase separate, and (c) an olivine separate. (d) Summary of magnetic hysteresis parameters on a Day plot. Black circles are Leg 153 samples with successful paleointensity results, gray circles are Leg 153 samples with a low NRM/TRM, open circles are Leg 153 samples that failed in the paleointensity experiments, black triangles are Exp. 304/305 samples with successful paleointensity results, gray triangles are Exp. 304/305 samples with a low NRM/TRM, open triangles are Exp. 304/305 samples that failed in the paleointensity experiments, crosses are plagioclase separates, and diamonds are olivine separates.