{"ok":true,"version":"1.1.0","license":"https://www.gsj.jp/license/license.html","attribution":"出典：産業技術総合研究所 地質調査総合センター「GSJ 地質図幅凡例データセット」","lang":"ja","type":"LegendUnit","id":"m445_u048","@id":"https://gbank.gsj.jp/ld/resource/zfk/units/m445_u048","geom":{"uri":"https://gbank.gsj.jp/ld/resource/zfk/units/m445_u048/geom","geojson_url":"https://cdn.gsj.jp/ld/zfk/units_geojson/m445_u048.geojson","centroid":{"lat":36.816217,"lon":139.260876,"epsg":4326},"bbox":[139.255727,36.804459,139.269046,36.835087],"color":"#556aa1"},"map":{"type":"LegendMap","map_id":445,"@id":"https://gbank.gsj.jp/ld/resource/zfk/maps/m445","sheet_code":"G50_07_089","series":"5万分の1地質図幅","title_ja":"男体山","title_en":"Nantaizan","author":["河田清雄"],"authors":[{"name_display":"河田清雄","name_ja":"河田清雄","name_en":"Kiyoo KAWATA","name_alt":["Kiyoo 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id=\"m445_u048_Pe\"></span><p>本岩は図幅地域の北西端に分布する斑糲岩体中に，南北に細長く伸びたレンズ状の岩体として露出する。これら橄欖岩は斑糲岩を貫ぬいて迸入したものである。</p><p>一般に淡黄色を帯びて蠟感を有する柔軟な部分と，黒色で非常に堅硬，緻密な部分とが錯綜しており，ところにより微弱な片理を示すことがある。基地はしばしば特有の紋様を呈する。</p><p>肉眼で輝石類の明瞭に認められる輝石橄欖岩と，蛇紋岩化の程度により岩相変化があるが，蛇紋石の網状細脈を生じたヅン橄欖岩とが，野外において認められる。</p><p>鏡下では橄欖石のほかに透角閃石を含み，そのほか少量の尖晶石や滑石を含む。また単斜輝石を有するものがあり，単斜輝石の多くは変質して角閃石を生じている。</p><p>橄欖石は一般に蛇紋石化作用を蒙り，不規則な網状の蛇紋石を生じている。透角閃石は無色で針状または小柱状を呈している。尖晶石は稀に少量含まれ，緑色を帯びた褐色を呈し，黒色不透明の鉄鉱物に縁取られている。</p></div></div>","text":"II.3.2 橄欖岩（Pe）\n本岩は図幅地域の北西端に分布する斑糲岩体中に，南北に細長く伸びたレンズ状の岩体として露出する。これら橄欖岩は斑糲岩を貫ぬいて迸入したものである。\n一般に淡黄色を帯びて蠟感を有する柔軟な部分と，黒色で非常に堅硬，緻密な部分とが錯綜しており，ところにより微弱な片理を示すことがある。基地はしばしば特有の紋様を呈する。\n肉眼で輝石類の明瞭に認められる輝石橄欖岩と，蛇紋岩化の程度により岩相変化があるが，蛇紋石の網状細脈を生じたヅン橄欖岩とが，野外において認められる。\n鏡下では橄欖石のほかに透角閃石を含み，そのほか少量の尖晶石や滑石を含む。また単斜輝石を有するものがあり，単斜輝石の多くは変質して角閃石を生じている。\n橄欖石は一般に蛇紋石化作用を蒙り，不規則な網状の蛇紋石を生じている。透角閃石は無色で針状または小柱状を呈している。尖晶石は稀に少量含まれ，緑色を帯びた褐色を呈し，黒色不透明の鉄鉱物に縁取られている。","blocks":[{"type":"heading","depth":1,"text":"II.3.2 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