黔西南灰家堡金矿田成矿构造特征研究

灰家堡矿田中水银洞等金矿床具有极高的矿石品位,成为卡林型金矿床特例.通过矿田构造与矿床地质研究,结合CSAMT深部探测,文章提出了灰家堡背斜为含金超压流体上拱形成的气液热隆褶曲,含金超压流体沿背斜轴部破裂带和盲断裂爆破上涌,交代上覆围岩形成高品位的层控型和断裂型金矿体的成矿模式,中二叠统与上二叠统之间岩溶不整合构造(构造蚀变体)作为深部含矿流体的中转聚集站,本身也赋存大规模的金矿体,据此提出了多方位的深部成矿预测方案.

Research on metallogenic regulation of gold-rich deposits and features of metallogenetic structure in Huijiabao gold field, Southwest of Guizhou, China

The Shuiyindong gold deposit in the Huijiabao gold ore field is an ultra-high grade special case in Carlin-type gold deposits. Based on researches on ore field structure and ore deposit geology, combined with the results of CSAMT measurement, the authors propose a new metallogenic model which holds that Huijiabao anticline was a gas-liquid heat upheaval fold resulting from the upwelling gold-bearing overpressure fluid, that the fluid upwelling in the explosive form along the fracture zone and blind fault replaced the covering rock to form the high grade stratabound and fault-bound gold ore bodies, and that the karst unconformity structure between middle Permian and upper Permian, i.e., the structural alteration body, served as the aggregation transshipment station, where there existed large-scale gold ore bodies too. The authors also present a multi-aspect suggestion for metallogenic prognosis at the depth of the ore field.