内蒙古白云鄂博矿床发现两种铌、钪新矿物:鄂博铌矿和翟钪闪石  

Oboniobite and Scandio-fluoro-eckermannite,two new minerals in the Bayan Obo deposit,Inner Mongolia

作　　者：佘海东 刘双良 范宏瑞[1,2,3] 谷湘平 李晓春[1,2,3] 杨奎锋 王其伟[3] She Haidong;Liu Shuangliang;Fan Hongrui;Gu Xiangping;Li Xiaochun;Yang Kuifeng;Wang Qiwei(Key Laboratory of Mineral Resources,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049;State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou,Inner Mongolia 014030;School of Earth Science and Info-physics,Central South University,Changsha 410083)

机构地区：[1]中国科学院地质与地球物理研究所矿产资源研究重点实验室,北京100029 [2]中国科学院大学地球与行星科学学院,北京100049 [3]白云鄂博稀土资源研究与综合利用全国重点实验室,内蒙古包头014030 [4]中南大学地球科学与信息物理学院,长沙410083

出　　处：《地质科学》2024年第5期1466-1469,共4页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金项目(编号:41930430);中国科学院地质与地球物理研究所重点部署项目(编号:IGGCAS-201901)资助。

摘　　要：稀土元素和铌元素具有独特的磁—光—电物理特性及高熔点等优点,且能与其它元素组成性能各异、品种繁多的新型材料,大幅提高低碳能源材料的质量和性能,是发展低碳绿色新能源产业的关键矿产资源。内蒙古白云鄂博矿床是全球最大的稀土矿床,同时也伴生有大量的铁、铌、钪、钍及萤石等矿产资源,且具有非常复杂的矿物组成和共生组合。据统计,在该矿床已发现的矿物达200余种,其中新矿物20种。鄂博铌矿和翟钪闪石是近期在该矿床发现的两种新矿物。其中,鄂博铌矿,呈黄褐色至褐色,板状,自形至半自形,粒度约为20~100μm,该矿物是一种结构简单的镁—铌氧化物类矿物,理想化学式Mg_(4)Nb_(2)O_(9),铌氧化物平均含量为58.0%,属于三方晶系,空间群P3c1(#165)。翟钪闪石,呈淡黄色或淡蓝色,长柱状,自形—半自形,粒度可达350μm,该矿物是一种含钪的角闪石族矿物,理想化学式为NaNa_(2)(Mg_(4)Sc)(Si_(8)O_(22))F_(2),钪氧化物平均含量为6.4%,属于单斜晶系,空间群C2/m(#12)。两个新矿物的发现,不仅增加了白云鄂博可用铌、钪金属选冶矿物种类,进而助力资源高效利用,而且也是人类不断了解、认识大自然,并利用自然界物质的重要过程。Rare earth elements and niobium have advantageous paramagnetic,mechanical and spectral properties,as well as a high melting point.These two elements are crucial for the development of a low-carbon green new energy industry.The Bayan Obo deposit in Inner Mongolia is the largest rare earth deposit in the world,and it is also containing significant amounts of niobium,iron,scandium,fluorite and other minerals.The deposit has a complex mineral composition and association,with over more than 200 known minerals,including 20 newly identified ones.Oboniobite and Scandio-fluoro-eckermannite are two new minerals recently discovered in this deposit.Oboniobite(Mg_(4)Nb_(2)O_(9))is a yellowish-brown to brown mineral that appears as platy,euhedral to subhedral crystals ranging from 20 to 100μm in size.It has a trigonal structure with space group P3c1(#165)and is a newly discovered magnesic-niobic species containing 57.6%Nb_(2)O_(5).Scandio-fluoro-eckermannite is yellowish blue and has a platy-prismatic,subhedral morphology,reaching sizes of up to 350μm.This mineral is monoclinic,with the space group C2/m(#12),and contains 6.39%Sc_(2)O_(3).The identification of two new minerals at the Bayan Obo deposit expands the variety of niobium and scandium minerals available and aids efficient resource utilization.Additionally,the discovery of these new minerals is critical for humans to continuously enhance their understanding of nature and effectively utilize natural materials.

关 键 词：新矿物 鄂博铌矿 翟钪闪石 白云鄂博 

分 类 号：P618.73[天文地球—矿床学] P618.79[天文地球—地质学]