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Earth, Planets and Space
Fig. 11 | Earth, Planets and Space

Fig. 11

From: Inflation and collapse of the Wai’anae volcano (Oahu, Hawaii, USA): implications from rock magnetic properties and magnetic fabric data of dikes

Fig. 11

Above: from dikes yielding reliable data (after rejection of abnormal fabric; see text), minimum confidence zone at 95% (Henry and Le Goff 1995). For Kmin axes(the great circle represents orientation of the dike plane, from field measurements). Below: magnetic zone axis (MZA), except for DK6 where it cannot be determined (too few normal fabrics), with its confidence zones at 95% and 63% (Henry 1997). Inferred flow direction is indicated by triangles (Schmidt diagrams, lower hemisphere). The orientation of the dike plane, suggested as materialized by the plane including the lengthening of the MZA confidence zone (red line), is slightly different from that obtained by the field measurement. The later is often only a rough estimate, particularly for the Hawaiian dikes, and the data from the MZA probably allow a more precise determination of this plane

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