Reliability of palaeointensity methods using alternating field demagnetization and anhysteretic remanence

Abstract

Using natural volcanic rocks which acquired thermoremanence (TRM) in known fields, reliability of various palaeointensity methods using alternating field (AF) demagnetization were evaluated. Natural remanence (NRM), TRM and anhysteretic remanences (ARM'S) before and after heating were stepwisely AF demagnetized following Shaw's method.