Variations of the Earth’s magnetic field in the Phanerozoic

被引：0
作者：
A. A. Schreider
Al. A. Schreider
P. Varga
C. Denis
机构：
[1] Russian Academy of Sciences,Shirshov Institute of Oceanology
[2] Lomonosov Moscow State University,Faculty of Geology
[3] Hungarian Academy of Sciences,The Seismological Observatory of the Geodetic and Geophysical Research Institute
[4] University of Liege,Institute of Astrophysics
来源：
Oceanology | 2011年 / 51卷
关键词：
Earth Planet; Tephra; Oceanic Crust; Maastrichtian; Lower Cambrian;
D O I：
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中图分类号：
学科分类号：
摘要：
The global VDM database, which was later supplemented by new determinations published in the world literature (a total of 3194 determinations), is used as the basis for addressing the VDM behavior in the Phanerozoic (0–542 Ma) and up to 580 Ma. The results revealed a positive linear trend to higher VDM values from 3.5 × l022 Am2 to 5.7 × l022 Am2. Against this background, fluctuations of the mean VDMs occur with a periodicity of about 40 Myr. In the Phanerozoic, prominent minima of the intensity are found in the time intervals of 510–520, 420–460, 340–370, 290–300, 240–270, 190–210, 165–140 Ma (chrons M17–M43), 130–120 Ma (chrons M2–M10), 100–110 Ma (chron C34), 75–85 Ma (chrons C33 and the beginning of chron C34), 70–60 Ma (chrons C31–C27), and 40–15 Ma (chrons C18–C5AD). The distribution of the VDMs appears to reflect the paleomagnetic field behavior and may be taken into account in a magnetization model for the reversely magnetized oceanic crust.
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页码：506 / 510
页数：4
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