Holocene geohazard events on the southern Izu Peninsula, central Japan (first title; Geohazard events during Holocene on the southern Izu Peninsula, central Japan.
Holocene geohazard events on the southern Izu Peninsula, central Japan (first title; Geohazard events during Holocene on the southern Izu Peninsula, central Japan.
复制标题
日本中部伊豆半岛南部全新世地质灾害事件（第一标题；日本中部伊豆半岛南部全新世地质灾害事件。
DOI：
10.1016/j.quaint.2015.04.021
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发表时间：
2015
影响因子：
2.2
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Kitamura;A.;Ohashi;Y.;Ishibashi;H.;Miyairi;Y.;Yokoyama;Y.;Ikuta;R.;Ito;Y.;Ikeda;M.;Shimano;T.
日本中部伊豆半岛南部4个地点出现的无基组合的动物组成和14c年龄表明，同震隆起发生在公元前1256 ~ 950年、公元1000 ~ 1270年、公元1430 ~ 1660年和公元1506 ~ 1815年。资料表明，伊豆半岛南部在约3100 BP时应力场转变为现在的南北挤压，近1000年来隆升诱发地震的重复周期变短。造成这次地震活动的主要断层似乎位于伊豆半岛南部的近海。对伊豆半岛南部6940 ~ 6810 cal BP之间沉积的1 cm厚的岩屑层进行了研究。这一层以前没有进行过岩石学研究，它由来自研究区域以东40公里处的伊豆大岛火山的碎屑颗粒组成，而不是来自伊豆半岛本身的火山。
Faunal compositions and14C ages of emerged sessile assemblages at four sites in the southern part of Izu Peninsula, central Japan, indicate that co-seismic uplift occurred at 1256–950 BC, AD 1000–1270, AD 1430–1660, and AD 1506–1815. The data suggest that the stress field in the southern part of Izu Peninsula changed to its current north–south compression at ca. 3100 BP, and that the recurrence intervals for uplift-inducing earthquakes have become shorter during the last 1000 years. The main faults responsible for this seismicity appear to be located offshore from the south part of Izu Peninsula. This study also examined a 1-cm-thick scoria layer deposited between 6940 and 6810 cal BP in the south part of Izu Peninsula. The layer, which had not been previously examined petrographically, consists of scoria grains derived from Izu-Oshima volcano located 40 km east of the study area, rather than from volcanoes located on Izu Peninsula itself.