Authors: ShuWei Zhang J Harald Walderhaug YueJun Yang
Publish Date: 2008/03/27
Volume: 53, Issue: 5, Pages: 759-767
Abstract
Magnetic measurements were performed on apparently deformed igneous rocks of 23 sites from the southeastern part of the Taimyr Peninsula Rock magnetism and reflected light microscopy analyses reveal that finegrained titanomagnetites up to pure magnetites mainly carry the majority of magnetic fabrics in the sills and that the slightly coarser Tipoor ormedium titanomagnetites carry most magnetic fabrics in the basaltic flows Magnetic anisotropies were determined by applying anisotropy of lowfield magnetic susceptibility AMS on 180 unheated samples and 128 samples that had been previously heated to 600°C during a paleomagnetic study to detect heating effects on the anisotropy of magnetic susceptibility AMS properties of volcanic rocks Laboratory heating significantly affects anisotropy variations of these igneous rocks corresponding to the mineralogical changes during the heat treatment
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