锡在花岗质熔体和流体中的性质及分配行为研究进展  

Advances in Tin Distribution between Granitic Melts and Coexisting Aqueous Fluids and a Review of Tin in Fluids and Melts

作　　者：胡晓燕[1] 毕献武[1] 胡瑞忠[1] 尚林波[1] 樊文苓[1] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学重点实验室

出　　处：《地球科学进展》2007年第3期281-289,共9页Advances in Earth Science

基　　金：中国科学院知识创新工程重要方向项目"中国南方大陆岩石拉张与成矿作用"(编号:KZCX3-SW-125);国家自然科学基金项目"富碱侵入岩的Au;Cu;Sn成矿专属性研究"(编号:40373020);中国科学院"西部之光"项目"富碱侵入岩与铜;金;锡成矿关系研究"共同资助

摘　　要：元素在流/熔体间的交换、分配过程是岩浆热液矿床形成的重要环节,作为与岩浆活动有密切成因联系的典型矿种之一,锡在花岗质熔体和流体中的存在形式、分配行为及其影响因素是认识其成矿机理的关键。锡在花岗质熔体和流体中的分配特征不仅受温度、压力、氧逸度等条件的制约,流体组成和熔体的NBO/T(非桥氧键/桥氧键)、碱含量、A lK/A l(总碱与铝含量比)也是制约锡分配行为的重要因素;挥发分F、C l对锡在流体、熔体中的地球化学行为影响尤为明显。The distribution of elements between melts and coexisting aqueous fluids plays an important role in magmatic hydrothermal ore-forming process. Tin ore is one of the representatives related to granitic magma evolvements. Cognition of tin species in granitic silicate melts, fluids and the partition coefficients is a key to recognition of the mechanism of tin ore-forming. The distribution of tin between granitic silicate melts and fluids is not only influenced by temperature, pressure, oxygen fugacity, but hlso controlled by NBO/T,Alkali and Alkali/Aluminium of melts and the content of fluids. Tin geochemical characteristics in melts and fluids are influnced significantly by different contents of volatiles fluorine and chlorine.

关 键 词：锡 花岗质熔体 流体 分配行为 

分 类 号：P618.44[天文地球—矿床学]