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甘肃龙首山芨岭地区钠交代型铀矿成矿模式研究
引用本文:赵如意.甘肃龙首山芨岭地区钠交代型铀矿成矿模式研究[J].地质与勘探,2013,49(1):67-74.
作者姓名:赵如意
作者单位:核工业二○三研究所,陕西咸阳,712000
基金项目:中国核工业地质局铀矿地质科研项目(编号:2010-56)资助
摘    要:钠交代型铀矿是龙首山铀成矿带重要的铀矿类型.文章以甘肃龙首山芨岭铀矿床为研究对象,介绍了该类型铀矿的矿体特征、矿石特征和地球化学特征.综合研究分析认为:由花岗质岩浆房产生的富气、富钠热液运移至压力骤减部位时,发生爆腾形成隐爆角砾岩,碳酸铀酰络合物(UO2(CO3)]4-)由于压力减小发生分解、卸裁成矿物质导致成矿;同时围岩产生了钠长石化、绿泥石化、碳酸盐化、赤铁矿化等蚀变.指出钠交代型铀矿的实质是隐爆角砾岩型铀矿,依据隐爆角砾岩的成矿模式,有望在该区获得新的找矿突破.

关 键 词:钠交代  隐爆角砾岩  成矿模式  芨岭  龙首山  甘肃
收稿时间:2012/4/11 0:00:00
修稿时间:2012/9/16 0:00:00

Metallogenic model of the Sodic-Metasomatic Type Uranium Ore Deposit in the Jiling area of Longshoushan,Gansu Province
ZHAO Ru-yi.Metallogenic model of the Sodic-Metasomatic Type Uranium Ore Deposit in the Jiling area of Longshoushan,Gansu Province[J].Geology and Prospecting,2013,49(1):67-74.
Authors:ZHAO Ru-yi
Institution:Research Institute NO. 203 of nuclear industry, Xianyang, Shaanxi
Abstract:Abstract: The alkali-metasomatic type uranium deposit area is an important deposit type in the Longshoushan ore belt, Gansu Province. In this paper, taking the Jiling uranium ore deposit in the Longshoushan ore belt as an example, we present the deposit, ore-body characteristics and its geochemical features. The results show that the gas-rich sodic fluid from magma chamber burst out to form cryto-explosive breccia when migrating to low-pressure positions. Then the carbonic-uranium complex (UO2(CO3)]4-) decomposed due to pressure decrease and unloaded mineral to form ores. The wall rocks underwent albitization, chloritization, carbonatation, hematitization, argillization, and silication. It is suggested that the sodic-metasomatic type uranium is essentially of cryto-explosive breccia type, and a breakthrough in ore search is expected upon the mineralization model of cryto-explosive breccia.
Keywords:Jiling  alkali-metasomatite  cryto-explosive breccia  ore forming model
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