新疆白杨河铀铍矿床控矿因素地球化学特征分析  

Geochemical Characteristic of Ore Controlling Factors of Xinjiang Baiyanghe Uranium-Beryllium Deposit

作　　者：陈浩[1] 王谋[1] 杨镜明[1] 

机构地区：[1]核工业216大队,新疆乌鲁木齐830000

出　　处：《东华理工大学学报（自然科学版）》2015年第4期364-368,共5页Journal of East China University of Technology(Natural Science)

摘　　要：通过总结白杨河铀铍矿床主要控矿因素,分析其地球化学特征及与成矿的作用关系,指出白杨河铀铍矿床区域地球化学背景具有较好的铀铍成矿前景。矿体主要赋存于花岗斑岩与泥盆系火山熔岩、火山碎屑岩的接触带部位,其中花岗斑岩为主要铀源体,中酸性围岩则为成矿富集提供了有利的地球化学障;南北接触带为矿区内重要的含矿和控矿构造,其矿化蚀变及微量元素差异说明铀与铍非同期产出物;该区含矿花岗斑岩蚀变最发育,矿化关系密切的围岩蚀变主要是赤铁矿化和萤石化,据不同蚀变程度微量元素对比发现Pb、Mo等元素可作为铀矿化蚀变的指示元素。Through summarizing the main ore controlling factors of Baiyanghe uranium-beryllium deposit, the inter- acting relationship between its geochemical characteristics and ore formation was analyzed, and the results show that the geochemical background of Baiyanghe uranium-beryllium deposit area possesses good prospective for ura- nium-beryllium ore formation. Ore body is mainly deposited in the contact zone between granite porphyry, and Devonian volcanic rocks as well as pyroclastic rock, and the granite porphyry is the principle uranium source. The intermediate-acid wall rock provides beneficial geochemical barrier for minerogenetic enrichment. The north-south contact zone is the important structure for ore forming and ore controlling in the mining area, and the difference in mineralized alteration and microelement content demonstrates that uranium and beryllium were formed in different phases. The ore-beating granite porphyry in this area has the most developed mineralized alteration, and hematiti- zation and fluoritization are the wall-rock alterations most closely related to mineralization. From the comparison of microelements at different alteration levels, it was found that elements such as Pb and Mo could be the indicator elements of uranium mineralization and alteration.

关 键 词：白杨河 铀铍矿床 花岗斑岩 控矿因素 地球化学 

分 类 号：P619[天文地球—矿床学]