The Relationship between Fluid Evolution and Hydrocarbon Accumulation and Metallization in the Nanpanjiang-Youjiang Basin: Evidence from Calcite Petrography and Fluid Inclusions

In the process of diagenesis and burial sedimentary basins, basin fluid activities participate in hydrocarbon accumulation metal mineralization. Understanding evolution is great significance revealing related Paleo-reservoirs are closely associated with Carlin-type gold deposits Nanpanjiang-Youjiang Basin, South China. Calcite, activity product, to bitumen gold-bearing pyrite. By integrating petrographic, cathode luminescence, inclusion analysis, as well relevant chronological results predecessors, this paper attempts establish relationship between evolution, accumulation, Two types calcite (black/gray white) developed Banqi-Yata-Laizishan area, Basin. Black/gray symbiotic features dark red colors luminescence. Many inclusions along analysis at low homogenization temperatures (65.7~173.1 °C). Combining previously reported U-Pb ages (~250–230 Ma) kind some geochemistry data on reservoir deposit, records consecutive mineralization from Late Permian Triassic periods controlled by Indosinian tectonic movement. The white featuring bright cathodoluminescence pyrite realgar, have high (128.2~299.9 Combined regional background isotopic chronology (~140–106 Ma), it seems record early Cretaceous subduction paleo-Pacific plate late Yanshanian period.