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归来庄金矿是近年来在鲁西南新发现的隐爆角砾岩型金矿床 ,成因上与附近铜石偏碱性杂岩体有关。本文通过对侵入杂岩和金矿床中流体包裹体研究 ,结合前人地质勘探和科研成果 ,认为形成归来庄金矿的成矿流体是岩浆水与大量来自围岩的大气降水混合而成 ,早期为富含卤素和 CO2 的低 -中等盐度热液 ,演化至晚期为低挥发分、不同盐度的低温热水溶液。金矿沉淀时的流体压力不高于 40～ 60 MPa,温度为 1 80～ 2 50℃。温度下降和伴随隐爆作用发生的减压和流体不混溶是促使金沉淀的主要因素。
The Guilaizhuang gold deposit is a newly discovered cryptoexplosive breccia-type gold deposit discovered in recent years in Southwest China and is genetically related to the copper-derived alkaline complex. Based on the study of fluid inclusions in intrusive complexes and gold deposits, combining with the previous geological exploration and scientific research, it is considered that the ore-forming fluid forming Guilizhuang gold deposit is a combination of magmatic water and a large amount of atmospheric precipitation from the surrounding rock. It is a low-moderate salinity hydrothermal solution that is rich in halogens and CO2 and evolved to a low-temperature hot-water solution with low volatility and different salinities in the late stage. The fluid pressure of the gold deposit is not higher than 40 ~ 60 MPa and the temperature is 180 ~ 250 ℃. Decreasing the temperature and accompanying decompression and fluid immiscibility of the implosion are the main factors that promote gold precipitation.