Abstract The forearc of the North-Central Peruvian Andes (FNCPA, 6–10°S) provides an exceptional opportunity to study the long-term processes that affect a convergent plate boundary. First, it shows long-term subsidence, depocenter superimposition and individualization. Second, although being mostly extensional and characterized as a typical erosive margin, the FNCPA shows complex uplifted regions. Older deformation is expressed by basement horst and grabens disposed in a complex geometry which onset may have resulted from strike-slip tectonics. A long-lived episode of regional subsidence affected the forearc and led to the relatively thick and regional deposition of the lower Miocene series coeval with a significant increase of the convergence velocity. This period was followed by an episodic uplift of trench-parallel corridors along the so-called Main Deformation Zone. Uplift ceased through the late Miocene and restarted during Pliocene and Quaternary, generating accommodation space by basin flank uplift for a forearc depocenter characterized by landward tilted strata. Significant along-strike differences in the degree of uplift resulted in either uplifting series producing sharp seaward dipping erosional surfaces or less uplifted areas covered by seawards prograding clinoforms. As a consequence of the shallow-water marine setting, the seismic strata geometry, lateral extent and thickness of the deposits for the Neogene successions in the FNCPA have been also tightly controlled by accommodation changes. Uplift is uneven along-strike independently of fault direction and closely followed the increase of the subsidence of the continental slope produced by subduction-erosion. Therefore, sediment underplating seems the most appropriate mechanism at the origin of uplift; as observed in other parts of the Peruvian and Chilean margins. Although the erosive character of the margin, the effects on basin geometry of the raised zone resemble that of typical outer forearc highs in accretionary margins such as in the Kumano basin in Japan.

中文翻译：

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侵蚀俯冲机制中的外弧高度控制：秘鲁中部前弧的案例（6-10°S）

摘要 秘鲁中北部安第斯山脉 (FNCPA, 6–10°S) 的前弧为研究影响会聚板块边界的长期过程提供了难得的机会。一是呈现长期沉降、沉积中心叠加和个体化。其次，虽然 FNCPA 主要是伸展的并且被表征为典型的侵蚀边缘，但 FNCPA 显示出复杂的隆起区域。较早的变形表现为基底地堑和地堑分布在复杂的几何形状中，其开始可能是由走滑构造引起的。一个长期的区域性沉降事件影响了弧前，并导致了同时期的下中新世系列相对较厚和区域性的沉积，收敛速度显着增加。在此期间之后，沿着所谓的主要变形区出现了与海沟平行的通道的间歇性抬升。隆起在中新世晚期停止，在上新世和第四纪重新开始，通过盆地侧翼隆起为以向陆倾斜地层为特征的弧前沉积中心产生容纳空间。隆起程度的显着沿走向差异导致隆起系列产生急剧的向海倾斜侵蚀面或由向海前移的斜面覆盖的隆起较少的区域。由于浅水海洋环境，FNCPA 中新近系序列的地震地层几何形状、横向范围和沉积物厚度也受到住宿变化的严格控制。与断层方向无关的沿走向不均匀隆起，紧随俯冲侵蚀产生的大陆坡下沉的增加。因此，沉积物底侵似乎是隆起起源最合适的机制；正如在秘鲁和智利边缘的其他地区所观察到的那样。尽管边缘具有侵蚀性，但对隆起带盆地几何形状的影响类似于增生边缘的典型弧外弧前高点，例如日本熊野盆地。