摘要
当前国内外砂岩型铀矿勘查研究显示,砂岩型铀矿床中普遍发育有钛铁矿及其蚀变产物,且与铀矿物在空间上存在紧密的共(伴)生关系。目前,对于钛铁矿蚀变及其与铀沉淀富集关系方面的研究十分有限,多停留在电子探针微区分析及理论推测层面,特别是与钛铁矿蚀变矿物具有密切成生关系的含钛铀矿物是什么,钛铁矿蚀变及其蚀变产物对于铀的沉淀富集有何作用?这些事关铀成矿机理的关键性科学问题研究十分薄弱,在一定程度上制约了对于该类铀矿化成矿作用研究以及勘查找矿工作的进一步深入。笔者在前期研究工作的基础上,调研了国内外相关文献,对涉及到钛铁矿蚀变及其与铀成矿作用有关的研究进展及存在问题进行了梳理。研究发现,实验模拟与分子热动力学模拟相结合的研究方法是成因矿物学以及矿床成矿机理研究的一个重要发展方向,可以将矿物学及矿床学研究尺度从矿物尺度拓展到分子尺度、乃至原子尺度,可以真正揭示含矿砂岩中钛铁矿蚀变作用过程中蚀变矿物的生成序列、铀的迁移-沉淀-富集机理以及内在动力学机制。纳米科学以及多学科与地质学的交叉与深度融合,为成矿作用研究提供了新的研究手段,也为进一步深化铀成矿作用机理、丰富铀成矿理论提供了新的研究领域。
The exploration and research of sandstone-type uranium deposits show that ilmenite and its alteration products are generally existed in U ore-bearing sandstones with close symbiotic or associated relationship to uranium minerals in space.However,investigations to the relationship between ferrotitanium oxides along with their altered minerals on uranium precipitation were seldom reported,which are only limited to the atomic probe micro-area analysis and theoretical speculation.Two basic questions of uranium-containing minerals types intergrowing with ferrotitanium oxides and the relation of ilmenite alteration to uranium precipitation and enrichment are still unresolved,and the key scientific issues of the uranium metallization mechanism are not addressed yet.Based on previous research work,we investigated relevant literature at home and abroad,and sorted out research progress and existing problems related to ilmenite alteration and uranium mineralization.It was found that the research method of combining experimental simulation with molecular thermodynamic simulation have become an important development direction of genetic mineralogy and ore formation mechanism research,which can expand mineralogy and ore deposit research from mineral scale to molecular scale,even atomic scale,so as to reveal the generation sequence of altered minerals in the alteration process of ilmenite in ore bearing sandstone,the migration precipitation enrichment mechanism of uranium and the internal driving force of uranium mineralization.Nanoscience,as well as the intersection and deep integration of multi-disciplinary and geology,provide a new research means for the study of mineralization,and provide a new field for further deepening the mechanism of uranium mineralization and enriching the research of uranium mineralization theory.
作者
刘红旭
丁波
刘威宏
邱林飞
王文全
LIU Hongxu;DING Bo;LIU Weihong;QIU Linfei;WANG Wenquan(CNNC Key Laboratory of Uranium Resources Exploration and Evaluation Technology,Beijing Research Institute of Uranium Geology,Beijing 100029,China;East China University of Technology,Nanchang,Jiangxi 330013,China)
出处
《铀矿地质》
CAS
CSCD
2023年第2期173-187,共15页
Uranium Geology
基金
中国核工业地质局地质科研项目“北方中新生代盆地砂岩铀矿新一轮战略选区”(编号:地D2204)
“铀矿重点勘查区勘查成果进展跟踪与动态评价及勘查部署建议”(编号:地D2219)
“甘蒙地区砂岩型铀矿综合编图与选区”(编号:地D2109)
中核集团“青年英才”科研项目(编号:QNYC2103)
核工业北京地质研院院长青年创新基金(编号:地QJC2001)联合资助。
关键词
砂岩型铀矿
钛铁矿蚀变
含钛铀矿物
纳米科学
学科交叉与融合
sandstone-type uranium deposit
ferrotitanium ore alteration
titanium bearing uranium miner⁃als
nanoscience
intersection and integration of disciplines
