不同来源的CO_2的成矿作用及发生作用的方式

CO_2可以来源于地幔,也可以来源于围岩与热液的反应,也可以来源于有机物质的分解等等,但是不管什么来源的CO_2,都对很多金属矿床,尤其是对金矿床和铀矿床的形成起着重要的作用。在成矿作用过程中,CO_2可以作为流体以气相或液相携带金属元素;也可以起着pH缓冲剂的作用,改变溶液的pH值,使成矿元素溶解或沉淀;也可以起着矿化剂的作用,和成矿元素络合,形成络合物并运移到地球化学障处沉淀成矿;也可以起着活化剂的作用,使成矿物质活化便于和硫等矿化剂淋滤成矿物质并富集成矿。

Mineralization and Function Types of Different Sources of CO2

CO2 can come from the mantle, the reaction of wall rock and geothermal, decomposition of organics and so on, but no matter where the CO2 comes from, it ＇ s very important for many metal deposits, especially for the formation of gold deposit and uranium deposit. During the mineralization, CO2 can be fluid of gas and liquid to take metal element, also can play the part of pH buffer, change the pH value of the liquid, make the metallogenic element dissolved or subsided; as the mineralizer and complexing with mineral elements, it can form clathrate and send the clathrate to geochemical barrier to deposit; it can also be the activating agent, which make the mineralizing matter activate and be convenient for sulfur etc. mineralizing agent to leach mineralizing matters and form deposits.