The punctuated distribution of major gold deposits along orogenic belts is poorly understood. In northern Perú, gold deposits cluster along trends that transect the subparallel Phanerozoic belts that accreted onto the western margin of the Archean–Proterozoic Amazonian craton. This suggests the influence of as yet unrecognized pre-Andean basement structures in controlling the localization of Phanerozoic deposits. We report the newly discovered Tomac ophiolite, which represents a missing link in tracing a cryptic basement collisional suture striking obliquely to the Peruvian Andes. The Tomac ophiolite signals the opening of a former Neoproterozoic ocean basin between the Amazonian craton and a continental ribbon of dispersed microterranes. Re-accretion of the continental ribbon resulted in the formation of a collisional belt between ca. 465 and 440 Ma. Rifting and re-accretion occurred parallel to the strike of the ca. 1400–1000 Ma Grenvillian-Sunsás orogen, indicating that structural corridors that transect the Andes at an oblique strike angle reflect inheritance of preexisting lithospheric weak zones. Our study demonstrates that Phanerozoic gold deposits in northern Perú cluster at the intersection between the newly defined basement suture and the superimposed Andean belt and associated well-documented cross faults. Gold mineralization was localized at ancient structural intersections, where enhanced permeability facilitated anomalous energy and mass transfer, promoting major ore accumulation during episodes of accretion.

中文翻译：

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古代结构继承解释了秘鲁北部的金矿聚集

主要金矿沿造山带的间断分布知之甚少。在秘鲁北部，金矿沿着横切亚平行显生宙带的趋势聚集，这些带在太古宙-元古代亚马逊河克拉通的西部边缘增生。这表明尚未识别的前安第斯基底结构在控制显生宙沉积物的定位方面的影响。我们报告了新发现的 Tomac 蛇绿岩，它代表了追踪与秘鲁安第斯山脉斜向的神秘基底碰撞缝合线的缺失环节。托马克蛇绿岩标志着亚马逊克拉通与分散的微地体大陆带之间的前新元古代海洋盆地的开放。大陆带的重新吸积导致约之间形成碰撞带。465 和 440 毫安。裂谷和重新吸积与约的罢工平行发生。1400-1000 Ma Grenvillian-Sunsás 造山带，表明以倾斜走向角横切安第斯山脉的构造走廊反映了先前存在的岩石圈薄弱带的继承。我们的研究表明，秘鲁北部的显生宙金矿聚集在新定义的基底缝合线与叠加的安第斯带和相关的有据可查的交叉断层之间的交汇处。金矿化位于古老的构造交汇处，渗透性增强促进了异常的能量和传质，促进了吸积期间的主要矿石聚集。表明以倾斜走向角横切安第斯山脉的构造走廊反映了先前存在的岩石圈薄弱带的继承。我们的研究表明，秘鲁北部的显生宙金矿聚集在新定义的基底缝合线与叠加的安第斯带和相关的有据可查的交叉断层之间的交汇处。金矿化位于古老的构造交汇处，渗透性增强促进了异常的能量和传质，促进了吸积期间的主要矿石聚集。表明以倾斜走向角横切安第斯山脉的构造走廊反映了先前存在的岩石圈薄弱带的继承。我们的研究表明，秘鲁北部的显生宙金矿聚集在新定义的基底缝合线与叠加的安第斯带和相关的有据可查的交叉断层之间的交汇处。金矿化位于古老的构造交汇处，渗透性增强促进了异常的能量和传质，促进了吸积期间的主要矿石聚集。我们的研究表明，秘鲁北部的显生宙金矿聚集在新定义的基底缝合线与叠加的安第斯带和相关的有据可查的交叉断层之间的交汇处。金矿化位于古老的构造交汇处，渗透性增强促进了异常的能量和传质，促进了吸积期间的主要矿石聚集。我们的研究表明，秘鲁北部的显生宙金矿聚集在新定义的基底缝合线与叠加的安第斯带和相关的有据可查的交叉断层之间的交汇处。金矿化位于古老的构造交汇处，渗透性增强促进了异常的能量和传质，促进了吸积期间的主要矿石聚集。