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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Subduction of the Nazca Ridge and the Inca Plateau: Insights into the fonnation of ore deposits in Peru
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Subduction of the Nazca Ridge and the Inca Plateau: Insights into the fonnation of ore deposits in Peru

机译：纳斯卡山脉和印加高原的俯冲：秘鲁矿床形成的见解

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摘要

A large number of ore deposits that formed in the Peruvian Andes during the Miocene (15-5 Ma) are related to the subduction of the Nazea plate beneath the South American plate. Here we show that the spatial and temporal distribution of these deposits correspond with the arrival of relatively buoyant topographic anomalies, namely the Nazca Ridge in central Peru and the now-consumed Inca Plateau in northern Peru, at the subduction zone. Plate reconstruction shows a rapid metallogenic response to the arrival of the topographic anomalies at the subduction trench. This is indicated by clusters of ore deposits situated within the proximity of the laterally migrating zones of ridge subduction. It is accordingly suggested that tectonic changes associated with impingement of the aseismic ridge into the subduction zone may trigger the formation of ore deposits in metallogenically fertile suprasubduction environments. (c) 2005 Elsevier B.V All rights reserved.
机译：在中新世（15-5 Ma）期间在秘鲁安第斯山脉形成的大量矿床与南美板块下方的Nazea板块俯冲有关。在这里，我们表明这些矿床的时空分布与相对活跃的地形异常相对应，即秘鲁中部的纳斯卡岭和秘鲁北部现已消耗的印加高原在俯冲带。板块重建显示了对地形异常到达俯冲沟的快速成矿响应。这由位于隆起俯冲的侧向迁移带附近的矿床成簇指示。因此建议，与抗震脊撞击到俯冲带有关的构造变化可能触发成矿作用上超俯冲环境中矿床的形成。 （c）2005 Elsevier B.V保留所有权利。

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