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A mantle wedge is a triangular shaped piece of mantle that lies above a subducting tectonic plate and below the overriding plate. This piece of mantle can be identified using seismic velocity imaging as well as earthquake maps. Subducting oceanic slabs carry large amounts of water; this water lowers the melting temperature of the above mantle wedge. Melting of the mantle wedge can also be contributed to depressurization due to the flow in the wedge. This melt gives rise to associated volcanism on the earth's surface. This volcanism can be seen around the world in places such as Japan and Indonesia.

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  • Cuña del manto (es)
  • Mantle wedge (en)
  • 地幔楔 (zh)
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  • En la geología la cuña del manto es la parte del manto terrestre que se encuentra sobre una o más placas tectónicas subducida y bajo la corteza terrestre de modo que, de perfil tiene toma forma de cuña. Partes de una cuña del manto pueden recibir fluidos acuosos provenientes de la placa subducida provocando su fusión parcial de peridotita​ así se origina el magma que puede terminar produciendo volcanes o plutones. (es)
  • A mantle wedge is a triangular shaped piece of mantle that lies above a subducting tectonic plate and below the overriding plate. This piece of mantle can be identified using seismic velocity imaging as well as earthquake maps. Subducting oceanic slabs carry large amounts of water; this water lowers the melting temperature of the above mantle wedge. Melting of the mantle wedge can also be contributed to depressurization due to the flow in the wedge. This melt gives rise to associated volcanism on the earth's surface. This volcanism can be seen around the world in places such as Japan and Indonesia. (en)
  • 地幔楔(mantle wedge),是在海沟(板块汇聚边界)处向地幔俯冲时与上盘的大陆板块(非潜没板块)之间夹杂的三角楔形的地幔舌部。可用地震波速成像来辨识。 俯冲的洋壳携带了大量挥发性水分(水合矿物的分解与渗透的海水),水分的上升将降低其上的地幔楔的熔化温度。地幔楔的流动导致的减压也有助于其熔化。熔融的地幔楔上升形成了火山活动。 弧前地幔扩展至俯冲带与地幔楔较冷的鼻部相遇之处,深度约为10–40 km.俯冲带之处的地震波衰减低,波速快。地幔楔区域的显示为低速高衰减区域,Vp= 7.4 km·s−1 ,Vs= 4 km·s−1. 没有火山弧的地幔楔就没有这种低速。这反映了地幔楔是否熔融。 (zh)
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  • En la geología la cuña del manto es la parte del manto terrestre que se encuentra sobre una o más placas tectónicas subducida y bajo la corteza terrestre de modo que, de perfil tiene toma forma de cuña. Partes de una cuña del manto pueden recibir fluidos acuosos provenientes de la placa subducida provocando su fusión parcial de peridotita​ así se origina el magma que puede terminar produciendo volcanes o plutones. (es)
  • A mantle wedge is a triangular shaped piece of mantle that lies above a subducting tectonic plate and below the overriding plate. This piece of mantle can be identified using seismic velocity imaging as well as earthquake maps. Subducting oceanic slabs carry large amounts of water; this water lowers the melting temperature of the above mantle wedge. Melting of the mantle wedge can also be contributed to depressurization due to the flow in the wedge. This melt gives rise to associated volcanism on the earth's surface. This volcanism can be seen around the world in places such as Japan and Indonesia. (en)
  • 地幔楔(mantle wedge),是在海沟(板块汇聚边界)处向地幔俯冲时与上盘的大陆板块(非潜没板块)之间夹杂的三角楔形的地幔舌部。可用地震波速成像来辨识。 俯冲的洋壳携带了大量挥发性水分(水合矿物的分解与渗透的海水),水分的上升将降低其上的地幔楔的熔化温度。地幔楔的流动导致的减压也有助于其熔化。熔融的地幔楔上升形成了火山活动。 弧前地幔扩展至俯冲带与地幔楔较冷的鼻部相遇之处,深度约为10–40 km.俯冲带之处的地震波衰减低,波速快。地幔楔区域的显示为低速高衰减区域,Vp= 7.4 km·s−1 ,Vs= 4 km·s−1. 没有火山弧的地幔楔就没有这种低速。这反映了地幔楔是否熔融。 (zh)
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