Physics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004pepi..142...49z&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 142, Issue 1-2, p. 49-59.
Physics
11
Scientific paper
A palaeomagnetic and geochronologic investigation has been conducted on a basalt lava sequence at Jianguo in Liaoning Province, northeastern China. Radiometric 40Ar/39Ar dating experiments indicate the volcanism occurred in relatively short time intervals between 105.5 and 102.2Ma. Thermomagnetic experiments and electron microprobe show that main primary carrier of remanence to be titanomagnetite with Curie temperature of ~300°C. A modified version of the Thellier-Thellier technique with systematic partial thermoremanent magnetization (pTRM)-checks was used for palaeointensity determinations. Fourteen out of 61 samples from the studied lavas yield reliable palaeointensity estimates with a mean virtual dipole moment (VDM*) of (4.07+/-0.2)×1022Am2, about half the strength of the modern-day field.
Lo Ching-Hua
Pan Yongxin
Shao Jian
Shi Guanghai
Shi Ruiping
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