Hydrothermal Rock Alteration of Matsukawa Geothermal Area, Iwate Prefecture
Hydrothermal Rock Alteration of Matsukawa Geothermal Area, Iwate Prefecture
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岩手县松川地热区热液岩石蚀变
DOI：
10.11456/shigenchishitsu1951.16.79_261
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发表时间：
1966
期刊：
影响因子：
--
通讯作者：
K. Sumi
中科院分区：
文献类型：
--
作者：
K. Sumi
为开发松川地热资源，深部钻探揭示了热液蚀变岩块的三维结构。该块体由五个不同矿物组成的区域组成。组合类型分别为弱蚀变带、蒙脱石带、高岭土带、明矾石带和叶蜡石带。蒙脱石、高岭土和明矾石三个带呈带状分布。讨论了以下几点：1.蚀变块整体上呈垂直拉长，深度达720m(距主要腐殖体活动时的恢复表面)。在海拔340米以上的较浅部分，直到地表显示出不对称的分带。在更深的部分，发现了从管道到外围的对称分带。深部的排液量可能大于浅部。尽管迁移趋势相似，但总体上浅层元素的迁移量大于深层。
The three-dimensional structure of a hydrothermally altered mass was revealed by deep drillings for the exploitation of the geothermal resources in Matsukawa. The mass comprises five zones of different mineral. assemblages, i. e. weakly altered zone, montmorillonite zone, kaolin zone, alunite zone and pyrophyllite zone, respectively. The three zones, montmorillonite, kaolin and alunite zones, are zonallyarranged. The followings are discussed:1. The altered mass as a whole is rather vertically elongated reaching to 720m in depth (from the restored surface at the time of main humarolic activity). The shallower part above the 340m level shows a asymmetrical zoning up to the surface. In the deeper part is recognized a symmetrical zoning from conduit to periphery.2. The amount of discharge of fluid was probaly larger in the deeper part than in the shallower part. The quantities of migrated elements as a whole were generally larger in the shallower part than in the deeper part, although the tendency of migration is similar.