江西邹家山铀矿床成矿特征及物质来源  

Metallogenetic Characteristics and Material Source of Zoujiashan Uranium Deposit,Jiangxi Province

作　　者：张万良[1] 李子颖[1] 

机构地区：[1]核工业北京地质研究院

出　　处：《现代地质》2005年第3期369-374,共6页Geoscience

摘　　要：邹家山矿床是一个典型的热液脉型铀矿床,产于江西中部相山火山—侵入杂岩体的西部。受邹家山—石洞断裂带及其派生的一系列张性—张扭性裂隙群(带)控制,脉状、透镜状矿体成群成带,围岩蚀变包括早期的以钠长石化为特征的碱交代和晚期的以水云母化、萤石化为特征的酸蚀变。从早期到晚期含矿热液的酸度逐渐降低、1δ8O逐渐变小的演化特征与典型的岩浆热液矿床类似。U、Th密切共生,沥青铀矿、矿石的稀土配分模式与碎斑熔岩和花岗斑岩近一致,反映了其成矿物质与碎斑熔岩和花岗斑岩一样,都来源于深部的岩浆体系,具有相同的来源。Zoujiashan deposit, located at the west of Xiangshan volcano-intrusive complex, is a typical hydrothermal vein-type uranium deposit, which is governed by Zoujiashan-Shidong fault and its induced tension or tenso-shear fracture zones. The veinand lens-shaped ore bodies are in group and in zone. The wall rock altera- tion can be divided into two epochs. The early epoch is characterized by alkalic replacement with albitization, apatitization, and carbonatization, and the late is acid alteration with fluoritization and hydromicazation. The evolution characteristics that both the acidity and δ^18O of the ore-bearing hydrothermal fall gradually from the early epoch to the late, are similar to those of other typical porphyry deposits. The coexistent relationship between U and Th in ores, and the similar REE patterns of uraninites, ores, granite-porphyrys and clastoporphyritic lava indicate that ore-forming materials, as granite-porphyrys and clastoporphyritic lava, originated from the deep magmatic system. They are of the same source.

关 键 词：成矿特征 热液演化 岩浆体系 邹家山矿床 

分 类 号：P619.14[天文地球—矿床学]