铜陵地区金属硫化物矿床沸腾流体成矿过程中气体逸失量的估算  

Estimation of gas-escaping amount during ore-formation originated from fluid boiling at massive sulfide deposits,Tongling region

作　　者：肖新建[1] 顾连兴[2] 倪培[2] 李子颖[1] 

机构地区：[1]核工业北京地质研究院,北京100029 [2]南京大学地球科学系

出　　处：《铀矿地质》2004年第2期91-98,114,共9页Uranium Geology

基　　金：国家自然科学基金 (No 4973 3 1 2 0 );地质矿产部"九.五"攻关项目(No 95 0 1 1 0 2 0 4 0 1 )成果

摘　　要：成矿流体的沸腾作用使得气液相分离 ,逸出大量的气体物质 ,造成流体的成矿物质浓度增大 ,并发生沉淀成矿。然而 ,沸腾作用究竟能使多少气体组分逃逸 ?从而在多大程度上造成上述影响呢 ?笔者以铜陵地区的狮子山矿床和铜官山矿床为例 ,试图定量化地探讨这一问题。分析计算结果表明 :在狮子山矿床中 ,沸腾作用可使 2 6%以上的原始成矿流体损失 ,这是非常可观的比例 !The boiling of metallogenic fluids leads to the separation of gas and liquid phases,making the escaping of great amount of gas material,and the rapid concentration of ore?forming material in fluids and its precipitation to from ores.However,how much gas can escape from fluid?How great the effect of gas?escaping to ore?formation?In this paper,authors try to quantitatively discuss the above questions on specific examples of Shizishan and Tongguanshan sulfide deposits,Tongling region.Estimation results indicate that the boiling of fluid may result in the escaping of more than 26% primary metallogenic fluids.It is a prodigious proportion!

关 键 词：沸腾作用 成矿流体 气体逸失 铜陵地区 

分 类 号：P611.5[天文地球—矿床学]