成矿流体的浓缩作用及浓缩方式研究

几乎所有的大中型热液矿床中都广泛存在着热液蚀变现象，且伴随强烈的成矿流体的浓缩作用。初始浓度较稀薄的含矿流体，通过水岩反应生成富水矿物的交代带使热液中的自由水固化在蚀变岩石中，热液中的自由水与Ｃ、Ｓ等组分反应而被大量地消耗，流体的减压沸腾都可极大地促进成矿热液中自由水的减少，从而使残余流体中金属浓度增高。可以通过构造－蚀变岩填图、实验模拟、特征指示性元素性状研究和交代剖面的数学模拟获得成矿溶液浓缩的幅度，进而判定矿化规模，通常在大、中型矿床中都发生过多次流体浓缩作用，依据水岩反应中流体浓缩理论，建立了含矿

Inspissation of Ore_forming Fluids and Its Forms

It is common for almost all of large_and medium_size hydrothermal deposits to develop widespread hydrothermal alteration,accompanied by inspissation of ore_forming fluids.Fluid_rock interaction makes initial low_concentration fluid form the metamorphic zone with water_rich minerals,and cause free_water in solution to solidify in the alteration zone.the interaction between free_water and such components as C and S together with boiling and release of pressure will stimulate the depletion of free_water and the increase of metallic concentration in residual solution.The inspissation of fluids can appear in structural zones or pore fluids.Tectonic_altered rock mapping,experimental simulation,indicator element studies and mathematical modeling for the metasomatic profile can help to determine the inspissation ranges of ore_forming fluids and the dimensions of mineralization.Hence,the theory of fluid inspissation in water_rock interaction will provide a criterion for deciding the ore_forming metamorphic formation and predicting the reserves of ore deposits.