论文部分内容阅读
岩浆在其放气作用过程中能向地表释放出大量的金属元素,如Cu、Mo、Au,如果存在适当的富集机制,从岩浆熔体中释放出来的成矿元素在一定的地质环境中聚集并沉淀就能够形成工业矿体。岩浆液态不混溶作用是导致分散于岩浆熔体中的成矿元素有效富集并最终形成工业矿体的重要机制。在封闭体系中,随岩浆结晶作用的进行,挥发性组分会在残余岩浆中不断聚集并最终析出而形成岩浆热液。F和B因易与Si、Al、Na、K等造岩元素结合而倾向于固定在熔体结构中,并在结晶作用发生时进入矿物晶格中,因此不易从岩浆熔体中析出而进入流体中。蚀变与矿化是两个独立的地质作用,尽管矿化与蚀变相伴生,但成矿作用的发生与否与蚀变作用没有本质上的联系。
Magma can release a large amount of metal elements such as Cu, Mo and Au to the surface during the process of deflation. If there is an appropriate enrichment mechanism, the ore-forming elements released from the magma melt in a certain geological environment Aggregation and precipitation can form industrial ore bodies. The liquid immiscibility is an important mechanism leading to the effective enrichment of metallogenic elements dispersed in magmatic melt and the final formation of industrial orebodies. In a closed system, as the crystallization of the magma progresses, the volatile components will accumulate in the residual magma and eventually form a magmatic hydrothermal solution. F and B tend to be fixed in the melt structure due to their combination with rock-forming elements such as Si, Al, Na, K and the like, and they enter the crystal lattice when the crystallization takes place and are therefore not easily precipitated from the magma melt Fluid. Alteration and mineralization are two independent geological processes. Although mineralization and alteration are accompanied, the occurrence of mineralization is not intrinsically linked with alteration.