广西珊瑚矿区中部成矿期构造应力场、热力场和地球化学场的耦合作用及成矿分析

通过对裂隙强度、蒸发晕和原生晕的系统研究，作者提出了长营岭和八步岭均存在隐伏岩体。成矿早期以岩体的热力场作用为主，形成矿区的水平倾向分带；中晚期以构造应力场作用为主，形成矿床的垂直逆向分带。根据矿液流向等方面资料分析，长营岭岩体的高点应位于矿床中北部，而不是以往所认为的南部。本区深部找矿的重点也应放在矿床的中北部。

THE COUPLING OF TECTONIC STRESS FIELD OF METALLOGENIC EPOCH, THERMODYNAMIC FIELD AND GEOCHEMICAL FIELD AND METALLOGENIC ANALYSIS IN THE MIDDLE OF SHANHU, GUANGXI

On-the basis of the systematic studies of fracture intensity,evaporation halo and primary halo, the author expounds the basic characteristics and coupling of the tectonic stress field of metallogenic epoch, the thermodynamic field and the geochemical field, advances that there are hidden granite bodies both in Changyingling and in Babuling. In the early metallogenic epoch, the thermodynamic field was dominant. Driven by thermodynamic forces, ore-forming fluids flowed up fromthe depth in the center to shallow levels both on the eastern and western sides along gentle and interlayer fractures, forming horizontal zoning in the ore district. In the middle and late metallogenic epochs, the tectonic stress field was dominant. Driven by tectonic stress, the ore-forming fluids flowed up from the depth in the northeast to the shallow levels in the southwest in pulsating manner along NNE steeply dipping tectonic fractures, forming vertical inverse zoning in the ore district. Through the analysis of the flow direction of ore- forming fluids and other data, it can beconsidered that the top of the Changyingling hidden granite lies in the central-north of the ore deposit, but not in the south of it as it was thought before. From the same reason, the focus of deepseated ore-search should be put upon the northern part of the ore district.