Upwarpimg Movement during the Quaternary in the Atsumi Peninsula, Central Japan
Upwarpimg Movement during the Quaternary in the Atsumi Peninsula, Central Japan
复制标题
日本中部渥美半岛第四纪的上翘运动
DOI：
10.4116/jaqua.6.89
复制
发表时间：
1967
期刊：
影响因子：
--
通讯作者：
Y. Ota
中科院分区：
文献类型：
--
作者：
Kayo Ishikawa;Y. Ota
大津半岛位于日本中部爱知县南部。在地质上，该半岛主要由厚度约为100米的较厚海相更新世沉积物组成，称为Atsumi组，不包括西部的内古生代山地。本文拟根据海相阶地的分布、特征和海拔高度，归纳出该半岛第四纪的地壳运动模式。结果表明：1)在Atsumi半岛存在5组海相阶地，表明前高海平面的存在。它们依次为高阶阶地、天pakuhara阶地、Fukue阶地、低阶阶地和冲积平原，其分布如图1所示。高阶阶地为破碎的磨蚀岩面，分为两层，均代表Atsumi组沉积前的早第四纪高海平面。如Kuroda、Kaizuka和Tsuchi等人先前的研究所指出的，天pakuhara阶地原本可以认为是Atsumi组的成藏阶地。目前，这个表面呈现起伏的丘陵地形，被许多小河密集地分割。福井阶地发育为典型的海相阶地，具有明显的后陡坡和由海相滩砾石不整合覆于Atsumi组上的平坦阶地平原。根据地质特征和构造特征的相似性，可以认为该阶地与关东地区的下水吉阶地有关
The Atsumi Peninsula is situated in the southern part of Aichi Prefecture, Central Japan. Geologically, this peninsula is mainly composed of the relatively thick marine Pleistocene sediments about 100m in thickness which is called the Atsumi formation, exclusive of the inlier Paleozoic mountainland in the west. In this paper, the authors intend to induce the mode of crustal movement during the Quaternary in this peninsula on the basis of the distribution, character and altitude of the marine terraces. The results are summarized as follows: 1) In the Atsumi Peninsula, there are five groups of the marine terraces which indicate the existence of the former high sea level. They are the higher terraces, Tempakuhara terrace, Fukue terrace, the lower terrace and the alluvial plain in the descending order and their distribution is shown in Fig. 1. The higher terraces are the fragmentary abraded rocky surfaces and subdivided into two levels, both of them represent the high sea level during the early Quaternary before the deposition of the Atsumi formation. Tempakuhara terrace can be considered originally, as the accumulation terrace of the Atsumi formation, as pointed out by Kuroda, Kaizuka and Tsuchi's previous studies. At present, this surface shows the undulated hilly topography, dissected densely by many small rivers. Fukue terrace is developed as the typical marine terrace which has the distinct back scarps and flat terrace plains composed of marine beach gravels overlying unconformably the Atsumi formation. This terrace can be thought to correlate with Shimosueyoshi terrace in Kanto district, according to the resemblance of geological and mor-