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Sandstone Composition in Mobile Belt : An Example from Japanese Islands

移动带中的砂岩成分：以日本列岛为例

基本信息

批准号：
63302019
负责人：
KIMINAMI Kazuo
金额：
$ 5.38万
依托单位：
Yamaguchi Univiesity
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63302019/
关键词：
Sedimentary petrology Sandstone composition Mobile belt Provenance 堆積岩々石学

项目摘要

The following summary of the research results is obtained.1. Sandstone and sands from the Cretaceous Hidaka Supergroup, Jurassic of the northern Kitakami Belt, Jurassic Tanba Group, Cretaceous-Paleogene Shimanto Supergroup, Permian of Ultra-Tanba Zone, Triassic of the Maizuru Belt, Cretaceous Izumi Group, Permian of the Chichibu Belt, core samples from thenkai Trough and others were studied by means of the chemical analysis. The studies have revealed chemical features of clastics from the staple basins in Japan, and a distinctive character of chemical composition of sandstones in each geologic time. The studies also have resulted in the relation between the type of magmatic arc and chemical features of sandstone.2. Modal analysis of sandstones from many basins has revealed the character of times on sandstone composition.(1) Sandstones from the Permian in the inner belt of southwest Japan and in the Chichibu Belt belong predominantly to a quartz-deficient intermediate volcanic sand petrofacies.(2) Sandstones from the Jurassic in the Oshima Belt, northern kitakami Belt, Mino Belt, Tanba Belt and Chichibu Belt belong to a quartz-rich granitic sand petrofacies.(3) Cretaceous sandstones show regional variation in modal composition. Sandstones from such basins situated on the Eurasian margin as Shimanto, Yezo and Hidaka belong to quartz-rich to quartz-deficient, acidic to intermediate volcanic sand petrofacies.

主要研究成果如下：1.对白垩纪日高群、北方北上带侏罗系、侏罗系丹波群、白垩纪-古近纪四万户群、超丹波带二叠系、舞鹤带三叠系、白垩纪泉群、秩父带二叠系、东海海槽岩心等砂岩和砂岩进行了化学分析。这些研究揭示了日本主要盆地碎屑岩的化学特征，以及各地质时期砂岩化学成分的独特性。研究还揭示了岩浆弧类型与砂岩化学特征的关系.通过对多个盆地砂岩的模态分析，揭示了砂岩成分的时代特征。(1)日本西南部内带和秩父带二叠纪的砂岩主要属于缺石英的中间火山砂岩相。(2)大岛岩带、北方北上岩带、美浓岩带、丹波岩带和秩父岩带的侏罗系砂岩属于富石英花岗质砂岩岩相。(3)白垩系砂岩在模态组成上具有区域性差异。位于欧亚大陆边缘的Shimanto、Yezo和日高等盆地的砂岩属于富石英-贫石英、酸性-中等火山砂岩相。