The Paleomagnetic Significance of Aeromagnetic Surveys of the Hawaiian Islands

摘要

Aeromagnetic surveys of the Hawaiian Islands have revealed that theprimary magnetic anomalies associated with the islands are dipole anomalies causedby the intrusive rocks of the volcanic centers and rift zones. Comparisons of thedirection of magnetization indicated by the dipole anomalies with results of laboratorymeasurements on lavas show that in many cases the lavas possess reversepolarization while the intrusive rocks are normally polarized. These results must betaken into account when interpreting the magnetic field of submerged marine volcanicfeatures such as seamounts and when establishing periods of reversal in theearth's magnetic field.