对670地区铀成矿的认识  

A RECOGNITION ON URANIUM METALLOGENESIS IN AREA No. 670

作　　者：周家志 

机构地区：[1]华东地质局269大队

出　　处：《铀矿地质》1996年第1期17-25,共9页Uranium Geology

摘　　要：本文分析和归纳了蒙山破火山口主要地质特征及其对６７０地区铀成矿所起的控制作用，论证了赋矿火山岩为壳幔混源、以壳源为主的岩浆产物；探讨了该区铀矿的成矿物质来源、成矿物化条件及其形成过程，认为该区铀矿属富铀基底地层重熔的火山岩浆期后含铀热液成因模式，其成矿物质由重熔岩浆分异演化而来，在近地表富氧、低温、张性火山构造中沉淀成矿。This paper analyses and concludes the main geological characteristics of Mengshan caldera and its control over uranium metallogenesis in area No. 6701demonstrates that the ore-hosting volcanic rocks are derived from the crust-mantle mixed source and mainly from the crustal source;approaches the uranium source, physicochemical condition of uranium metallogenesis and its formational process in the uranium deposit of the area. It is considered that uranium deposit in this area can be synthesized into the genetic model of uraniferous hydrothermal solution of postmagmatic volcanic magma remelted from the uranium-enriched basement, its ore-forming materials are derived from the remelted magmatic differentiation an d evolution and are precipitated to form the deposit in oxygen-rich,low temperature and tensile volcanic tectonics at near-surface.

关 键 词：铀矿床 成矿 热液成矿 破火山口 

分 类 号：P619.140.5[天文地球—矿床学]