Thermal and geochemical footprints of low-temperature sedimentary rock-hosted hydrothermal Au-systems: identifying far-field vectors toward ore

在地球表面发现新的矿物是很罕见的。未来的发现将取决于地下勘探，这需要对此类矿床进行远场探测。沉积岩是加拿大乃至世界上Au、Pb、Zn、Cu等世界级矿床的重要容矿围岩。它们形成于<4-6公里的深度，来自地壳较热层的热流体上涌。由于这些系统的低温（<200-250 ℃）和微妙的、空间受限和约束不良的蚀变晕，确定它们的远场表达具有挑战性。

New mineral occurrences at the earth's surface are rare. Future discoveries will depend on subsurface exploration and this requires the far-field detection of such ore deposits. Sedimentary rocks are important hosts for world-class deposits of Au, Pb, Zn & Cu in Canada and the world. They form at <4-6 km depth from the upwelling of hot fluids derived from hotter levels of the crust. Defining the far-field expression of these systems is challenging owing to their low temperature (<200-250 C) and subtle, spatially restricted and poorly constrained, alteration halos.