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Paired metamorphic belts are sets of parallel linear rock units that display contrasting metamorphic mineral assemblages. These paired belts develop along convergent plate boundaries where subduction is active. Each pair consists of one belt with a low-temperature, high-pressure metamorphic mineral assemblage, and another characterized by high-temperature, low-pressure metamorphic minerals.

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  • Paired metamorphic belts (en)
  • 成雙變質帶 (zh)
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  • Paired metamorphic belts are sets of parallel linear rock units that display contrasting metamorphic mineral assemblages. These paired belts develop along convergent plate boundaries where subduction is active. Each pair consists of one belt with a low-temperature, high-pressure metamorphic mineral assemblage, and another characterized by high-temperature, low-pressure metamorphic minerals. (en)
  • 成雙變質帶(英語:paired metamorphic belts)是一組平行的線性變質岩帶,一個帶由低溫高壓變質礦物組合,另一帶以高溫低壓變質礦物組合。兩帶之間有對比鮮明的變質礦物組合。 成雙變質帶是在聚合板塊邊緣造成的。沿海溝區域產生低溫、高壓變質環境,而弧區下方產生高溫、低壓變質環境。 低溫高壓變質帶以藍片岩相和榴輝岩相為主。 常見的礦物包括:硬柱石、石榴石、藍閃石、柯石英(英語:coesite)、绿纤石、赤鐵礦。 這種礦物組合表明在 2.5-3.5 GPa 的壓力下溫度為 500-800 攝氏度。 高溫低壓變質帶以麻粒岩相和角閃岩相為主。 常見礦物包括:矽線石、石英、堇青石、斜方輝石。 這種礦物組合表明溫度在 0.5-1.3 GPa 的壓力下達到 1000 攝氏度。 成對的變質帶可推斷俯衝方向和板塊相對運動。 例如,日本東部的 Ryoke/Sanbagawa 成對變質帶指出西北俯衝方向的變質序列。 而日本西海岸的 Hidaka/Kamuikotu 成對變質帶則表現出相反的方向,表明了不同的俯衝方向。 (zh)
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  • Paired metamorphic belts are sets of parallel linear rock units that display contrasting metamorphic mineral assemblages. These paired belts develop along convergent plate boundaries where subduction is active. Each pair consists of one belt with a low-temperature, high-pressure metamorphic mineral assemblage, and another characterized by high-temperature, low-pressure metamorphic minerals. (en)
  • 成雙變質帶(英語:paired metamorphic belts)是一組平行的線性變質岩帶,一個帶由低溫高壓變質礦物組合,另一帶以高溫低壓變質礦物組合。兩帶之間有對比鮮明的變質礦物組合。 成雙變質帶是在聚合板塊邊緣造成的。沿海溝區域產生低溫、高壓變質環境,而弧區下方產生高溫、低壓變質環境。 低溫高壓變質帶以藍片岩相和榴輝岩相為主。 常見的礦物包括:硬柱石、石榴石、藍閃石、柯石英(英語:coesite)、绿纤石、赤鐵礦。 這種礦物組合表明在 2.5-3.5 GPa 的壓力下溫度為 500-800 攝氏度。 高溫低壓變質帶以麻粒岩相和角閃岩相為主。 常見礦物包括:矽線石、石英、堇青石、斜方輝石。 這種礦物組合表明溫度在 0.5-1.3 GPa 的壓力下達到 1000 攝氏度。 成對的變質帶可推斷俯衝方向和板塊相對運動。 例如,日本東部的 Ryoke/Sanbagawa 成對變質帶指出西北俯衝方向的變質序列。 而日本西海岸的 Hidaka/Kamuikotu 成對變質帶則表現出相反的方向,表明了不同的俯衝方向。 (zh)
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