EarthRef.org Reference Database (ERR) -- Kono & Nagata 1968

EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information

Kono & Nagata 1968

Kono, M. and Nagata, T. (1968). Intensity of the Earth's magnetic field in geological time; [Part] 1, Late Pliocene in the southwestern U.S.A. Journal of Geomagnetism and Geoelectricity 20(3): 211-220.

Basaltic rocks from 23 late Pliocene lava flows in New Mexico andArizona were studied by Thellier's method and 17 intensity estimates were obtained. For both normal and reversed samples the field of intensity at the sampling locality at the time of lava flow was not greatly different from that of the present; estimates for the late Pliocene range from 0.35 oe to 0.82 oe, the mean value being 0.53 + or - 0.14 oe. Comparison of magnitude of natural remanent with that of total thermoremanent magnetization produced in the laboratory could not give reliable intensity values in many cases, because most samples show changes in magnetic properties during heating. According to results from Rio Grande lavas the intensity fluctuations of the Pliocene geomagnetic field seem to have a much shorter period than the duration of a geomagnetic polarity epoch.

DATABASE QUICK LINKS

	MagIC Database

BACKGROUND DATA FILES

	Abstract

	Table 1
	Table 2

	Samples
	Experimental Procedure

	MagIC SmartBook v1
	MagIC SmartBook v2

Keywords
Arizona; Cenozoic; Earth; intensity; magnetic field; Neogene; New, Mexico; Pliocene; Tertiary; United States, 18, Solid-earth geophysics

Journal
Journal of Geomagnetism and Geoelectricity
http://www.terrapub.co.jp/journals/EPS/JGG/

Publisher
Terra Scientific Publishing Co., Tokyo
5-27-19 Okusawa
Setagaya-ku, Tokyo 158-0083
Japan
+81-3-3781-7500
+81-3-3718-4406
gj@ess.sci.osaka-u.ac.jp