| 下庄铀矿田成矿模式 |
| |
| 引用本文： | 何德宝,范洪海,汪昱.下庄铀矿田成矿模式[J].铀矿地质,2016(3):152-158. |
| |
| 作者姓名： | 何德宝 范洪海 汪昱 |
| |
| 作者单位： | 1. 核工业北京地质研究院,北京,100029;2. 成都理工大学信息科学与技术学院,四川成都,610059 |
| |
| 摘 要： | 笔者对下庄铀矿田不同类型矿床的成矿期次、流体包裹体温度及成分特征等进行了对比研究,结果表明该矿田不同类型的铀矿床具有相同的物质来源,铀成矿作用经历了3个阶段。第1阶段成矿年龄为138 Ma,矿化主要受东西向构造控制,为中高温碱性热液成矿;第2阶段成矿年龄为96.4~81 Ma,矿化主要受北东向构造控制,为中低温酸性热液成矿;第3阶段成矿年龄为61 Ma,表现为后期改造作用成矿。结合区域构造、岩浆演化历史,建立了下庄铀矿田的构造控矿三维成矿模式,认为铀矿床具有多阶段叠加成矿的特点,早期构造在晚期应力作用下派生的张裂部位是找矿的有利部位。希望铀矿床存在东西向基性岩脉充填构造,其深部具有寻找东西向矿体的潜力。
|
| 关 键 词： | 成矿模式 成矿时代 流体包裹体 构造控矿 下庄铀矿田 |
Metallogenic Model in Xiazhuang Uranium Ore Field |
| |
| Abstract: | Study of metallogenic epoch , temperature and composition of the fluid inclusions in different deposits in Xiazhuang ore field indicated that the uranium deposits were with the same ore‐forming flu‐id.Mineralization in Xiazhuang ore field can be divided into three stages.The first metallogenic stage was happened at 138Ma by alkaline fluid with high temperature , and the ore body was controlled by EW‐trending structure. The second metallogenic stage was happened at 96.4 ~ 81 Ma by acidic fluid with moderate‐to‐low temperature ,and the ore body was controlled by NE‐trending structure.The third met‐allogenic stage was happened at 61 Ma and the ore body was reformed from old ore body.Based on the structure and magma evolution , A 3D structure controlling metallogenic model was established for Xi‐azhuang uranium ore field. The deposit was believed to be formed by supposition of several stage mineral‐ization and the favorable exploration place is the tensional part of the later derived fracture of the early main structure. There were EW strike basement structure filled with basic rock veins in Xiwang deposit , therefore there are potential to find orebody in the deep of the deposit. |
| |
| Keywords: | metallogenic model metallogenic epoch fluid inclusion ore controlling structure Xiazhuang uranium ore field |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
