Language:
English
In:
Journal of Geophysical Research, 2003-08-15, Vol.108 (B8), p.2379-n/a
Description:
Detailed rock magnetic investigations, including the analysis of the laboratory installed magnetizations, the measurement of hysteresis parameters, and the high temperature‐dependency of the saturation magnetization, were carried out on sediments from Birkat Ram, Golan Heights, Israel. The 550 cm long composite profile, composed of three single cores, is supposed to span the Late Holocene, i.e., the last 4400 years, at least. Titanomagnetites in the pseudo single‐domain range were identified as the main magnetic carrier minerals in the homogenous sediments. The variations in concentration and grain size of the magnetic fraction are only partly reflected in the sediment lithology. The relative paleointensity was estimated by normalizing the intensity of the natural remanent magnetization (NRM) after demagnetization at 20 mT (JNRM(20 mT)) by different concentration parameters. The median destructive field of the NRM (MDFNRM) is coherent with the relative paleointensity estimates, indicating that a sedimentary effect has not sufficiently been removed by the normalization process. The morphologies of these estimates, however, correspond to the archeomagnetic records from Bulgaria and Greece. Therefore a second normalization, based on the linear relationship between the paleointensity estimates and the MDFNRM, was applied, resulting in an improvement of the records.
Subject(s):
Birkat Ram ; General or miscellaneous ; Geomagnetism and Paleomagnetism ; Instruments and techniques ; lacustrine sediments ; Late Holocene ; Near East ; Paleointensity ; relative paleointensity ; Rock and mineral magnetism ; rock magnetism
ISSN:
0148-0227
E-ISSN:
2156-2202
DOI:
10.1029/2002JB002049
Source:
Wiley Online Library All Backfiles
Source:
Alma/SFX Local Collection
Source:
Wiley-Blackwell Full Collection 2014
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