甘肃北山算井子花岗岩地球化学特征、成因及对高放废物地质处置的启示
Geochemical Characteristics and Petrogenesis of the Suanjingzi Granites in Beishan,Gansu Province and Implications for Geological Disposal of High-Level Radioactive Wastes(HLWs)
贵仁高 1王驹 2周淼 3张晓平 3唐振平 4吴鹏 5汪佳伟 5孙浩然 5李南 4段先哲1
作者信息
- 1. 南华大学 资源环境与安全工程学院,湖南 衡阳 421001;稀有金属矿产开发与废物地质处置技术湖南省重点实验室,湖南 衡阳 421001
- 2. 中核集团核工业北京地质研究院,北京 100029
- 3. 湖南省地质灾害调查监测所,湖南 长沙 410000
- 4. 稀有金属矿产开发与废物地质处置技术湖南省重点实验室,湖南 衡阳 421001
- 5. 南华大学 资源环境与安全工程学院,湖南 衡阳 421001
- 折叠
摘要
北山是中亚造山带的重要组成部分,广泛发育着花岗岩.前人对北山花岗岩开展了大量地球化学研究,但很少与高放废物地质处置相结合.本研究分析了哈尔特尔德勒、哈尔根头口布、算井子花岗岩的岩石类型,并以算井子花岗岩为例,分析其岩石成因,探讨其对高放废物地质处置的启示,得到如下结论:1)哈尔特尔德勒花岗岩是A型、南岭型花岗岩,哈尔根头口布花岗岩属于A型、浙闽型花岗岩,算井子花岗岩为未分异的Ⅰ型、埃达克型花岗岩;2)处置库围岩的Fe3+/Fe2+比值可能对高放废物地质处置具有重要意义;3)算井子花岗岩属于埃达克质成因,但成矿潜力微弱,甚至不能成矿,因此该地区作为高放废物地质处置库选址,符合经济性原则;4)算井子花岗岩含有较高体积分数的黑云母,对放射性核素的阻滞具有重要作用,有利于作为高放废物地质处置库围岩.
Abstract
Beishan is an important part of the Central Asian orogenic belt,where a lot of granites are developed.Many geochemical studies have been carried out on the Beishan granites,but few of them are combined with the geological disposal of high-level radioactive wastes(HLWs).In this paper,the rock types of Haerteerdele,Haergentouk-oubu and Suanjingzi granites are analyzed.Then this study takes Suanjingzi granite as an example to analyze its petrogenesis,and discusses the implications of petrogenesis on the geological disposal of HLWs.The main understandings are listed as follows:1)Haerteer-dele granite is A-type granite and Nanling-type granite;Haergentoukoubu granite is A-type granite and Zhemin-type granite;Suanjingzi granite is undifferentiatedⅠ-type granite and Adak-type granite.2)The Fe3+/Fe2+ratio of the surrounding rock of the repository may have important significance for the geological disposal of HLWs.3)Suanjingzi granite be-longs to Adakic origin,but the metallogenic potential is weak,even can not be metallo-genic;thus,this area is considered as a geological disposal repository site of HLWs,in line with the economic principle.4)Suanjingzi granite,which contains high volume of bi-otite,plays an important role in the retardation of radionuclides,and facilatates the geolog-ical disposal of HLWs.
关键词
甘肃北山/算井子花岗岩/地球化学特征/Fe3+/Fe2+比值/高放废物地质处置Key words
Beishan in Gansu Province/Suanjingzi granite/geochemical characteristics/Fe3+/Fe2+ratio/geological disposal of High-Level Radioactive Wastes(HLWs)引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据