【摘要】 以剪切带型金矿为例,基于对中国东部胶东西北部地区及其典型金矿田、金矿床构造应力场与成矿地球化学场的详细研究结果,初步阐释了它们在多重时-空间尺度上的耦合关系。区域尺度上,应力极值区不利于成矿,金矿床就位于应力梯级带,尤其是不同方向应力梯级带的交汇部位。矿田尺度上,成矿物质有从应力高值区向低值区运移的趋势,成矿主期应力梯度的增大有利于成矿元素进一步浓集,应力梯级的强烈变化地段(或时段)往往形成金属元素的大量堆积。矿床尺度上,成矿物质的运移受不同方向剪应力梯级带的叠加影响,金属元素就位于NE和NW向应力梯级带交汇部位缓坡带一侧的次级梯级带之上。多重时-空尺度成矿动力学的深入研究,将可能揭示出这种非线性效应的丰富内涵。更多还原

【Abstract】 Based on tectonic stress fields and metallogenic geochemical fields in multi-scales of area,orefields and ore deposits in northwest Jiaodong,China,the authors have discussed th e coupling relationship between the tran-sition of tectonic stress fields and its metallogenic geochemical field s on multi-scales.Regionally the re gions of stress maximum and minimum are adverse to ore formation.Gold deposits are located in the gradient zones of shear stress,especially in the intersectant places of different stress gradi ent zones.On the scale of orefield,t he metal-logenic materials trend to migrate f rom the regions of higher stress valu e to the places of lower stress value.The increase of stress gradient in the ma in metallogenic stage makes a contribution to concentrating of metallogenic elements.Generally,metal element s have emplaced in the places(or the periods)where(or when)stress gradient changes sharply.On the sca le of ore deposit,the stress gradien t zones of NE strike and the stress gra dient zones of NW strike control together t he migration of metallogenic matera ls.Metal elements emplace in the sub-gradient zones on the gentle side of t he intersectant places of the stress gradient zones of NE strike and the stress gradient zones of NW strike.Theses s how that the nonlinear effects of ore formation exist on multi temporal an d spatial scales,and more researches of the dynamics of this phenomenon could be useful for bringing to light its essence.更多还原