大井铜-锡多金属矿床成矿作用与岩浆流体的关系

通过对大井铜锡多金属矿床硫化物的硫同位素和流体包裹体的氢同位素测定，确定了成矿期的流体以大气降水为主，但硫主要来源于深部的岩浆流体。岩浆流体对这类热液脉型矿床的形成起着重要作用， 富硫和其它挥发组分的岩浆流体携带了岩浆中的Cu、Sn等多种成矿金属元素，它与大气降水的混合是造成Sn、Cu和Zn等金属成矿物质逐步沉淀的主要原因

The Relationship between Mineralization of the Dajing Cu Sn Polymetallic Deposit and Magmatic Fluid

Determination of sulfur isotope of sulfides and hydrogen isotope of fluid inclus ions at the Dajing Cu Sn polymetallic ore deposit confirms that meteoric water was the dominant fluid at its ore forming stage, but sulfur was mostly derived from a deep magmatic fluid. Magmatic fluid, in fact, plays an important role in the formation of hydrothermal vein deposits. The magmatic fl uid enriched in sulfur and other volatile components may carry many ore forming metallic elements in the mag ma, such as Cu and Sn. The mixture of magmatic fluid with meteoric water is the main reason for successive depositions of ore forming metals such as Sn, C u and Zn.