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STUDY OF FORMATION MECHANISM OF INTERSTRATIFIED CHLORITE/SMECTITE

层间绿泥石/蒙脱石形成机理研究

基本信息

批准号：
62540624
负责人：
TOMITA Katsutoshi
金额：
$ 0.45万
依托单位：
KAGOSHIMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

项目摘要

Some samples of interstratified chlorite/smectite were collected from altered tuff breccia in Hiwaki-cho, alteredandesites in the Doyama area, Aira-cho, hydrothermally altered volcanic rocks in the Maurazaki area and Bonotsu area, altered andesites in the Fuke mine, Okuchi, and Kinzan, Yokogawa-cho, Kagoshima Prefecture. Interstratified chlorite/smectite samples were collected by sedimentation method, and analyzed by X-ray diffraction method. Altered minerals in the Doyama area could be divided into three zones, ZoneI, ZoneII and ZoneIII by the differences of mineral assemblage. The ZoneI is characterized by chlorite. The ZoneII is by interstratified chlorite/mont morillonite, and the ZoneIII is by montmorillonite. Altered rocks in Hiwaki-cho could be divided into three zones, inner, intermediate and outer zone, by the differences of mineral associations. The intermediate zone is divided into two subzones (A and B). Inner zone is characterized by kaolinite-chlorite-sericite-calcite, in … More termediate zone A is by kaolinite-chlorite-randomly interstratified mica/montmorillonite-calcite, intermediate zone B is by kaolinite-randomly interstratified mica/montmorillonite-randomly interstratified chlorite/montmorillonite,and outer zone is by montmorillonite-heulandite-mordenite. In the Okuchi area, chlorite zone(inner), mixed-layer chlorite/montmorillonite zone(intermediate), and montmorillonite zone (outer) are observed surrounding intruded hornblende andesite. Hydrothermally altered volcanic rocks are widely distributed in the southern part of the Bonotsu area. Clay minerals such as chlorite, smectite, sericite, interstratified mica/smectite and interstratified chlorite/smectite are formed in the altered rocks. In the Makurazaki area, hydrothermally altered andesites are widely distributed, and clay minerals in the altered rocks are kaolinite, interstratified mica/smectite, interstratified dioctahedral chlorite/smectite, dioctahedral smectite, trioctahedral chlorite, interstratified trioctahedral chlorite/smectite and trioctahedral smectite. Concerning the origin of the interstratified chlorite/smectite, the Makurazaki sample was probably formed from smectite in intermediate stage in the transformation of smectite to chlorite, whereas other samples were formed from chlorite on the process of transformation of chlorite into smectite. Less

从Hiwaki-cho的蚀变凝灰岩角砾岩、Aira-cho土山地区的蚀变安山岩、Maurazaki地区和Bonotsu地区的热液蚀变火山岩、Okuchi Fuke矿的蚀变安山岩中采集了一些层间绿泥石/蒙皂石样本，以及鹿儿岛县横河町的金山。采用沉降法采集蒙脱石/蒙脱石间层样品，用X射线衍射法进行分析。根据矿物组合的差异，将土山地区蚀变矿物划分为Ⅰ、Ⅱ、Ⅲ带。第一区的特征是：Ⅱ带为蒙脱石/蒙脱石间层带，Ⅲ带为蒙脱石间层带。根据矿物组合的差异，日胁町蚀变岩可分为内、中、外带三个带。中间区分为两个分区（A和B）。内带以高岭石-绢云母-方解石为特征， ...更多信息中间带A为高岭石-云母-蒙脱石-方解石随机间层，中间带B为高岭石-云母-蒙脱石-蒙脱石随机间层，外带为蒙脱石-片沸石-丝光沸石。在Okuchi地区，在侵入的角闪石安山岩周围观察到蒙脱石带（内部）、蒙脱石/蒙脱石混合层带（中间）和蒙脱石带（外部）。热液蚀变火山岩广泛分布于波之津地区南部。蚀变岩中形成的粘土矿物有云母、蒙皂石、绢云母、云母/蒙皂石间层、云母/蒙皂石间层。在Makurazaki地区，热液蚀变安山岩广泛分布，蚀变岩中的粘土矿物有高岭石、间层云母/蒙皂石、间层双八面体蒙脱石/蒙皂石、双八面体蒙皂石、三八面体蒙脱石、间层三八面体蒙脱石/蒙皂石和三八面体蒙皂石。关于间层蒙脱石/蒙脱石的成因，Makurazaki样品可能是由蒙脱石向蒙脱石转化的中间阶段的蒙脱石形成的，而其他样品则是由蒙脱石向蒙脱石转化过程中的蒙脱石形成的。少