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\u5ca9\u77f3\u306e\u307b\u3068\u3093\u3069\u306f\u591a\u76f8\u56fa\u76f8\u7cfb\u3067\u3042\u308a\u3001\u7b2c\uff11\u76f8\u9271\u7269\u306e\u7c92\u754c\u306b\u5b64\u7acb\u3057\u3066\u5b58\u5728\u3057\u3066\u3044\u308b\u7b2c2\u76f8\u304c\u30aa\u30b9\u30c8\u30ef\u30eb\u30c9\u6210\u9577\u3057\u3001\u305d\u308c\u306b\u5fdc\u3058\u3066\u7b2c1\u76f8\u7c92\u5b50\u3082\u7c92\u6210\u9577\u3059\u308b\u3002\u305d\u306e\u6642\u3001\u7c97\u5927\u5316\u3059\u308b\u7b2c2\u76f8\u3068\u7b2c1\u76f8\u306e\u91cd\u306a\u308a\u3092\u89e3\u6d88\u3059\u308b\u3088\u3046\u306b\u3001\u7b2c1\u76f8\u7c92\u5b50\u306e\u5909\u5f62\uff08\u30af\u30ea\u30fc\u30d7\uff09\u304c\u5fc5\u8981\u3068\u8003\u3048\u3089\u308c\u3001\u591a\u76f8\u56fa\u76f8\u7cfb\u306e\u30af\u30ea\u30fc\u30d7\u3068\u7c92\u6210\u9577\u306f\u540c\u3058\u30e1\u30ab\u30cb\u30ba\u30e0\u3067\u9032\u3080\u3068\u4e88\u60f3\u3055\u308c\u308b\u3002\u672c\u7814\u7a76\u3067\u306f\u3001\u30d5\u30a9\u30eb\u30b9\u30c6\u30e9\u30a4\u30c8(Mg2<\/sub>SiO4<\/sub>)\uff0b\u30da\u30ea\u30af\u30ec\u30fc\u30b9(MgO)\u591a\u7d50\u6676\u4f53\u306e\u30af\u30ea\u30fc\u30d7\u5b9f\u9a13\u3068\u7c92\u6210\u9577\u5b9f\u9a13\u3092\u884c\u3044\u3001\u30af\u30ea\u30fc\u30d7\u3068\u7c92\u6210\u9577\u3092\u652f\u914d\u3059\u308b\u62e1\u6563\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u660e\u3089\u304b\u306b\u3057\u305f(Okamoto & Hiraga, 2022 JGR)\u3002\u6700\u3082\u9045\u3044\u62e1\u6563\u7a2e\u3067\u3042\u308b\u30b1\u30a4\u7d20\u306f\u3001\u3053\u306e\u591a\u7d50\u6676\u4f53\u3067\u306f\u7b2c1\u76f8\u3067\u3042\u308b\u30d5\u30a9\u30eb\u30b9\u30c6\u30e9\u30a4\u30c8\u306b\u306e\u307f\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u5148\u7a0b\u306e\u4eee\u8aac\u3092\u691c\u8a3c\u3059\u308b\u305f\u3081\u306b\u9069\u3057\u305f\u8a66\u6599\u3060\u3068\u8003\u3048\u3089\u308c\u308b\u3002\u3053\u306e\u30d5\u30a9\u30eb\u30b9\u30c6\u30e9\u30a4\u30c8\uff0b\u30da\u30ea\u30af\u30ec\u30fc\u30b9\u591a\u7d50\u6676\u4f53\u306b\u5bfe\u3057\u3066\u3001\u5927\u6c17\u5727\u30fb\u9ad8\u6e29\uff081150\u301c1400\u2103\uff09\u4e0b\u3067\u306e\u4e00\u8ef8\u5727\u7e2e\u65b9\u5411\u306e\u30af\u30ea\u30fc\u30d7\u5b9f\u9a13\u3092\u884c\u3063\u305f\u3002\u307e\u305f\u30011300\u2103\u304b\u30891450\u2103\u306e\u7570\u306a\u308b\u6e29\u5ea6\u3067500\u6642\u9593\u306e\u7c92\u6210\u9577\u5b9f\u9a13\u3082\u884c\u3063\u305f\u3002\u5b9f\u9a13\u5f8c\u306e\u8a66\u6599\u306e\u5fae\u7d30\u69cb\u9020\u3092\u8d70\u67fb\u578b\u96fb\u5b50\u9855\u5fae\u93e1\u3067\u89b3\u5bdf\u3057\u305f\u3002\u305d\u306e\u7d50\u679c\u3001\u30af\u30ea\u30fc\u30d7\u901f\u5ea6\u3068\u7c92\u6210\u9577\u901f\u5ea6\u306e\u4e21\u65b9\u304b\u3089\u63a8\u5b9a\u3055\u308c\u308b\u62e1\u6563\u4fc2\u6570\u306f\u5b9f\u8cea\u540c\u3058\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u3063\u305f\u3002\u3053\u306e\u7d50\u679c\u306f\u3001\u30d5\u30a9\u30eb\u30b9\u30c6\u30e9\u30a4\u30c8\uff0b\u30da\u30ea\u30af\u30ec\u30fc\u30b9\u591a\u7d50\u6676\u4f53\u306e\u30af\u30ea\u30fc\u30d7\u3068\u7c92\u6210\u9577\u304c\u3001\u5171\u901a\u306e\u62e1\u6563\u30e1\u30ab\u30cb\u30ba\u30e0\u306b\u5236\u5fa1\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3059\u3002\u591a\u304f\u306e\u5ca9\u77f3\u306b\u304a\u3044\u3066\u3001\u6700\u3082\u9045\u3044\u62e1\u6563\u7a2e\u304c\u7b2c\u4e00\u76f8\uff08\u4f8b\u3048\u3070\u3001Si\uff09\u306b\u542b\u307e\u308c\u308b\u3053\u3068\u304b\u3089\u3001\u30af\u30ea\u30fc\u30d7\u3068\u7c92\u6210\u9577\u306e\u901f\u5ea6\u304c\u5171\u901a\u306e\u62e1\u6563\u4fc2\u6570\u3067\u6c7a\u307e\u308b\u3068\u3053\u3068\u304c\u4e88\u60f3\u3055\u308c\u308b\u3002\u7c92\u6210\u9577\u3092\u4f34\u3046\u62e1\u6563\u30af\u30ea\u30fc\u30d7\u4e2d\u306e\u591a\u7d50\u6676\u4f53\u306e\u7c98\u6027\u7387\u306f\u305d\u306e\u5171\u901a\u306a\u62e1\u6563\u4fc2\u6570\u3068\u6642\u9593\u3067\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u304d\u3001\u7c92\u5f84\u2010\u6642\u9593\u7c98\u5ea6\u8a08\u304c\u63d0\u6848\u3055\u308c\u305f\u3002<\/p>\n

\u4e0a\u90e8\u30de\u30f3\u30c8\u30eb\u4e3b\u8981\u9271\u7269\u3067\u3042\u308b\u30aa\u30ea\u30d3\u30f3\u306e\u7d50\u6676\u8ef8\u304c\u3001\u5ca9\u77f3\u4e2d\u3067\u3042\u308b\u65b9\u5411\u306b\u914d\u5411\u3059\u308b\u3053\u3068\u304c\u77e5\u3089\u308c\u3001\u4e0a\u90e8\u30de\u30f3\u30c8\u30eb\u5185\u306e\u5730\u9707\u6ce2\u901f\u5ea6\u7570\u65b9\u6027\u306e\u6210\u56e0\u3068\u8003\u3048\u3089\u308c\u3066\u3044\u308b\u3002\u305b\u3093\u65ad\u9762\u304a\u3088\u3073\u305b\u3093\u65ad\u65b9\u5411\u306b\u5bfe\u3057\u3066\u7d50\u6676\u8ef8\u304c\u4e26\u3076\u30d1\u30bf\u30fc\u30f3\u306b\u69d8\u3005\u306a\u3082\u306e\u304c\u3042\u308b\u3053\u3068\u304c\u77e5\u3089\u308c\u3066\u3044\u308b\u3002Miyazaki et al. (2013 Nature) \u306b\u304a\u3044\u3066\u3001\u62e1\u6563\u30af\u30ea\u30fc\u30d7\u4e0b\u3067\u7d50\u6676\u8ef8\u9078\u629e\u914d\u5411\u304c\u751f\u3058\u308b\u3053\u3068\u3001Maruyama & Hiraga (2017ab JGR)\u3067\u3001\u305d\u306e\u914d\u5411\u304c\u7c92\u754c\u3059\u3079\u308a\u306b\u3088\u3063\u3066\u751f\u3058\u308b\u3053\u3068\u3092\u660e\u3089\u304b\u306b\u3057\u305f\u3002\u672c\u7814\u7a76\u3067\u306f\u3001\u69d8\u3005\u306a\u7d50\u6676\u8ef8\u9078\u629e\u914d\u5411\u306e\u30d1\u30bf\u30fc\u30f3\u304c\u62e1\u6563\u30af\u30ea\u30fc\u30d7\u3067\u751f\u3058\u308b\u304b\u3092\u5b9f\u9a13\u7684\u306b\u8abf\u3079\u305f(Kim et al., 2022 JGR)\u3002Miyazaki et al. (2013) \u304a\u3088\u3073Maruyama & Hiraga (2017ab)\u3067\u7528\u3044\u305f\u540c\u4e00\u8a66\u6599\u3067\u3042\u308b\u30aa\u30ea\u30d3\u30f3\uff0b20vol%\u30c0\u30a4\u30aa\u30d7\u30b5\u30a4\u30c9\u591a\u7d50\u6676\u4f53\u306b\u5bfe\u3057\u3066\u3001\u7570\u306a\u308b\u6e29\u5ea6\u3001\u5909\u5f62\u6642\u9593\u6761\u4ef6\u3067\u306e\u7d14\u7c8b\u305b\u3093\u65ad\u5909\u5f62\u5b9f\u9a13\u3092\u884c\u3063\u305f\u3002\u30aa\u30ea\u30d3\u30f3\u306eb\u8ef8\u304c\u305b\u3093\u65ad\u9762\u306e\u6cd5\u7dda\u65b9\u5411\u306b\u96c6\u4e2d\u3059\u308b\u30bf\u30a4\u30d7\u3001\u305d\u306e\u96c6\u4e2d\u306b\u52a0\u3048\u3066a\u8ef8\u304c\u305b\u3093\u65ad\u65b9\u5411\u306b\u4e26\u3076\u30bf\u30a4\u30d7\u3001\u914d\u5411\u3057\u306a\u3044\uff08\u30e9\u30f3\u30c0\u30e0\uff09\u30bf\u30a4\u30d7\u304c\u898b\u3044\u3060\u3055\u308c\u305f\u3002\u305d\u306e\u30bf\u30a4\u30d7\u304c\u3001\u30aa\u30ea\u30d3\u30f3\u7c92\u5b50\u5f62\u3067\u6c7a\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3001\u7c92\u5b50\u5f62\u306f\u7c92\u5b50\u6210\u9577\u3068\u5171\u306b\u5909\u5316\u3059\u308b\u3053\u3068\u304c\u5206\u3063\u305f\u3002\u3053\u308c\u307e\u3067\u3001\u30aa\u30ea\u30d3\u30f3\u306e\u914d\u5411\u304a\u3088\u3073\u305d\u306e\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u8ee2\u4f4d\u30af\u30ea\u30fc\u30d7\u4e0b\u3067\u306e\u6c34\u306e\u6709\u7121\u3001\u5fdc\u529b\u306e\u5927\u5c0f\u3001\u6e29\u5ea6\u306e\u9055\u3044\u7b49\u306b\u3088\u3063\u3066\u5909\u5316\u3059\u308b\u3068\u8003\u3048\u3089\u308c\u3066\u304d\u305f\u304c\u3001\u6211\u3005\u306f\u3001\u7c92\u6210\u9577\u306b\u3088\u3063\u3066\u7c92\u754c\u3059\u3079\u308a\u3057\u6613\u3044\u65b9\u5411\u304c\u5909\u5316\u3057\u3001\u305d\u308c\u306b\u5fdc\u3058\u3066\u7d50\u6676\u8ef8\u9078\u629e\u914d\u5411\u30d1\u30bf\u30fc\u30f3\u304c\u5909\u5316\u3059\u308b\u3068\u3044\u3046\u65b0\u3057\u3044\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u63d0\u6848\u3059\u308b\u3002<\/p>\n

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