涡旋成矿作用

帚状和环状矿脉带在大型超大型热液矿床中是最常见的,这两种矿脉带的分布形式与流体力学中涡旋结构的外带(螺旋带)和内带(环状带)相对应。根据上述特征,作者提出涡旋成矿作用的概念:成矿溶液在科里奥利力的作用下旋转上升,有选择地充填断裂和裂隙,从而形成帚状和环状矿脉带。

VORTEX METALLIZATION

Brush veins and ring veins are common in hydrothermal deposits, especially super large-Scale deposits. These two forms of vein distribution are compared with the outer circle and the inner circle, respectively, of the vortex in fluid mechanics. Moreover, the distribution of brush veins in Chinese hydrothermal deposits indicate an anticlock wise rotation. Thus the concept of vortex metallization is put forward for hydrothermal deposits. According to this concept, the ore-forming solution under the action of magma heat is of rotation-rising, which is anticlockwise owing to the Coriolis force. Brush veins and ring veins recorded just the rotation-rising of the ore-forming solution. The anticlock wise direction of the rotation they indicate is the due effect of the Coriolis force on the Northern Hemisphere. Interestingly, it is the ore-forming solution that chose preexisting faults or fractures as its filling space in many hydrothermal deposits. This is different from rotational structures in geomechanics.