Other
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986e%26psl..78..121f&link_type=abstract
Earth and Planetary Science Letters, Volume 78, Issue 1, p. 121-128.
Other
16
Scientific paper
The dates of movements of the Itoigawa-Shizuoka Tectonic Line (I-S T.L.) and Minobu Fault in the western South Fossa Magna have been obtained by ESR dating. Measurements were made on various lattice defects of the OHC, Ge, Al and E' centres in quartz grains of fault clay and quartz veins intruded at the time of movement. All the dates obtained from these centres in quartz grains from two localities of the I-S T.L. and two localities of the Minobu Fault fall in the range of 0.30-0.55 Ma; this suggests that all the centres were annihilated completely, and that the obtained age can be admitted as the actual data of the latest fault movement. Meanwhile, ESR dates of,quartz vein and fault clay in other localities (locations 3, 6, 7) are divided into 0.30-0.55 Ma and 1.5-2.0 Ma, which suggest incomplete resetting. The dates of 0.30-0.55 and 1.5-2.0 Ma might correspond to the clino-unconformities observed in Plio-Pleistocene sequence of this region.
Fukuchi Tatsuro
Imai Noboru
Shimokawa Koichi
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