PALEOMAGNETIC RECORD OVER THE PAST 35,000 YEARS OF A SEDIMENT CORE FROM OFF SHIKOKU, SOUTHWEST JAPAN

被引:12
作者
OHNO, M
HAMANO, Y
MURAYAMA, M
MATSUMOTO, E
IWAKURA, H
NAKAMURA, T
TAIRA, A
机构
[1] UNIV TOKYO,EARTHQUAKE RES INST,TOKYO 113,JAPAN
[2] UNIV TOKYO,OCEAN RES INST,NAKANO KU,TOKYO 113,JAPAN
[3] NAGOYA UNIV,WATER RES INST,CHIKUSA KU,NAGOYA,AICHI 464,JAPAN
[4] NAGOYA UNIV,DATING & MAT RES CTR,CHIKUSA KU,NAGOYA,AICHI 464,JAPAN
关键词
D O I
10.1029/93GL01241
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The paleomagnetism of a sediment core (KT89-18, P4), recovered from the sea floor off Southwest Japan, was studied to investigate geomagnetic field variation over the past 35,000 years. Alternating fields demagnetization revealed that the remanent magnetization of the unconsolidated sediments was stable and not affected by any secondary overprints. C-14 datings were made on 21 horizons, using a Tandetron accelerator mass spectrometer, providing a detailed time scale to the core. The inclination record agrees with that from Lake Biwa [Kawai et al., 1975], and supports the existence of the geomagnetic excursions which had been found in the Lake Biwa core. The ages of the excursions are estimated to be during ca. 32 ky.B.P. is similar to ca. 28 ky.B.P. and ca. 26 ky.B.P. is similar to ca. 24 ky.B.P.
引用
收藏
页码:1395 / 1398
页数:4
相关论文
共 28 条
[1]   CORRECTION OF ACCELERATOR MASS SPECTROMETRY C-14 AGES MEASURED IN PLANKTONIC FORAMINIFERA: PALEOCEANOGRAPHIC IMPLICATIONS [J].
Bard, Edouard .
PALEOCEANOGRAPHY, 1988, 3 (06) :635-645
[2]   ANALYSIS OF MAGNETIC INCLINATION IN BORECORES [J].
BRIDEN, JC ;
WARD, MA .
PURE AND APPLIED GEOPHYSICS, 1966, 63 (01) :133-&
[3]   AN EXPERIMENT ON THE POST-DEPOSITIONAL REMANENT MAGNETIZATION IN ARTIFICIAL AND NATURAL SEDIMENTS [J].
HAMANO, Y .
EARTH AND PLANETARY SCIENCE LETTERS, 1980, 51 (01) :221-232
[4]  
Hirooka K., 1983, GEOMAGNETISM BAKED C, P150
[5]   GEOMAGNETIC SECULAR VARIATION RECORDED IN REMANENT MAGNETIZATION OF SILTY SEDIMENTS FROM THE INLAND SEA, JAPAN (SETO-NAIKAI) [J].
HYODO, M ;
YASKAWA, K .
JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY, 1986, 38 (01) :11-26
[6]   PALEOMAGNETISM OF A CORE FROM OSAKA BAY [J].
HYODO, M ;
MORINAGA, H ;
NISHIMURA, H ;
INOKUCHI, H ;
YASKAWA, K .
JOURNAL OF GEOMAGNETISM AND GEOELECTRICITY, 1985, 37 (07) :729-737
[7]   OSCILLATING GEOMAGNETIC-FIELD WITH A RECURRING REVERSAL DISCOVERED FROM LAKE BIWA [J].
KAWAI, N ;
TORII, M ;
YASKAWA, K ;
NAKAJIMA, T ;
HORIE, S .
PROCEEDINGS OF THE JAPAN ACADEMY, 1972, 48 (03) :186-&
[8]  
KAWAI N, 1975, PALEOLIMNOLOGY LAKE, V3, P143
[9]   STATISTICS OF PALEOMAGNETIC INCLINATION DATA [J].
KONO, M .
JOURNAL OF GEOPHYSICAL RESEARCH, 1980, 85 (NB7) :3878-3882
[10]   A 60000-YEAR PALEOMAGNETIC RECORD FROM GULF OF CALIFORNIA SEDIMENTS - SECULAR VARIATION, LATE QUATERNARY EXCURSIONS AND GEOMAGNETIC IMPLICATIONS [J].
LEVI, S ;
KARLIN, R .
EARTH AND PLANETARY SCIENCE LETTERS, 1989, 92 (02) :219-233