The Florida Canyon evaporite-related Zn-Pb sulfide deposit, in northern Peru, is one of the largest Mississippi Valley-type deposits in South America. Triassic carbonate and former evaporite-bearing rocks of the Pucará Group host the orebodies that constitute two different styles: (1) predominantly stratabound ore associated with hydrocarbon-rich porous dolostones and evaporite dissolution breccias and (2) high-grade ore associated with evaporite breccias representing diapiric injections along faults. A dome structure that controls the location of the ore deposit was defined by drill hole spatial data; the dome likely resulted from halokinetic processes during Andean deformation. NNE-trending, steeply dipping secondary faults linked to major northwest structures appear to control the distribution of ore grades in the deposit. Mineralization postdated hydrocarbon migration and accumulation. Strontium, carbon, and oxygen data isotope signatures allow distinction between pre- and synmineralization carbonate stages. The sulfur isotope composition of sulfides in the deposit suggests they precipitated as the result of mixing of a metal-rich fluid with resident hydrogen sulfide in the dome. Local thermochemical sulfate reduction may have contributed to the reduced sulfur budget during mineralization.

中文翻译：

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秘鲁北部邦加拉区与蒸发器相关的密西西比河谷型矿床佛罗里达峡谷的Zn-Pb矿化

秘鲁北部与佛罗里达州蒸发岩有关的Zn-Pb硫化物矿床，是南美最大的密西西比河谷型矿床之一。Pucará集团的三叠纪碳酸盐岩和以前的含蒸发岩的岩体构成了两种不同的矿体：（1）与富烃多孔白云岩和蒸发岩溶角砾岩相关的主​​要为地层结合矿，以及（2）与蒸发岩角砾岩相关的高品位矿石代表沿断层的二元注入。钻孔空间数据定义了控制矿床位置的穹顶结构。圆顶可能是由安第斯变形过程中的晕动过程造成的。与西北主要构造有关的北非走向，陡倾的次生断层似乎控制着矿床中矿石品位的分布。矿化作用晚于碳氢化合物的迁移和聚集。锶，碳和氧数据的同位素特征可以区分预矿化阶段和全矿化碳酸盐阶段。矿床中硫化物的硫同位素组成表明，它们是由于富金属流体与穹顶中残留的硫化氢混合而沉淀的。局部热化学法硫酸盐的还原可能是导致矿化过程中硫预算减少的原因。