二连盆地中东部赛汉组古河谷砂岩型铀矿床控矿成因相研究  

Research on the Ore-Controlling Genetic Facies of the Sandstone Type Uranium Deposits in the Paleovalley of Saihan Formation of the Erlian Basin

作　　者：刘波[1,2] 杨建新 秦彦伟 乔鹏 张锋 

机构地区：[1]吉林大学地球科学学院,吉林长春130000 [2]核工业二〇八大队,内蒙古包头014010

出　　处：《地质与勘探》2016年第6期1037-1047,共11页Geology and Exploration

基　　金：二连盆地中西部铀矿资源远景调查(编号12120115017401);整装勘查区基础地质研究(编号12120114076601);中国核工业地质局二连盆地铀矿调查与勘查项目共同资助

摘　　要：二连盆地为中国北方重要的油、煤、铀能源盆地,盆地内沉积型铀矿床主要分布于中东部赛汉组古河谷内,典型的矿床有巴彦乌拉大型铀矿床、巴润小型铀矿床、赛汉高毕中型铀矿床和哈达图矿床。古河谷内矿床表现为"同河谷多矿床、同河谷多类型"的特点。古河谷砂岩型铀矿床(体)受古河谷内河流沉积体系和氧化还原界面的控制。本文在赛汉组古河谷铀源、沉积体系、控矿结构面和典型矿床研究的基础上,总结了控矿成因相特征,建立了古河谷内矿床的控矿成因相模式。将赛汉组古河谷内典型矿床的控矿成因相模式划分为辫状河-潜水/辫状河潜水-层间氧化型和曲流河-潜水氧化型。The Erlian Basin is a major area of oil, coal, and uranium energy in northern China. The sedimentary- type uranium deposits are mostly distributed in the uranium - bearing paleo - valley in its middle and east. The typical ore deposits include the Bayanwula large - scale uranium deposit, Barun small uranium deposit, saihangaobi medium - sized uranium deposit and the Hadatu ore field. The uranium deposits in the ancient valley are charac- terized by ＂multiple deposits in the same valley and many types in the same valley＂. The sandstone - type uranium deposit in the paleo - valley is con- trolled by the fluvial sedimentary system and oxidation - reduction interface. Based on the study of uranium sources, deposition systems and typical ore de- posits in the uranium -bearing paleo -valley, tbis paper summarizes the characteristics of ore controlling genesis facies and establishes ore -controlling genetic facies models of the deposits in the paleo - valley. This study suggests that the ore genesis facies models can be divided into braided river - phre- atic type, phreatic - interlayer oxidation type and meandering river phreatic - oxidation type.

关 键 词：赛汉组古河谷 控矿成因相 沉积体系 控矿结构面 二连盆地中东部 

分 类 号：P612[天文地球—矿床学]