摘要
由胶体转化成因的氧化锰矿物具有独特晶体化学特性,是天然矿物体系中最复杂的一类矿物。通过XRD、微区XRD、SEM和EDS分析,实现对北衙金矿氧化带矿石中各种氧化锰矿物成分和结构测试。结果表明:在该矿石中存在不同结构的6种氧化锰矿物,包括层状结构的水钠锰矿和钙硬锰矿、一维隧道结构的软锰矿、二维隧道结构的锰铅矿和隐钾锰矿、三维隧道结构的钙锰矿。金属离子进入氧化锰晶格呈现一定的规律性:铅趋向于进入具二维和三维大隧道结构的锰铅矿和钙锰矿中,铜和锌的离子半径较小,进入各种氧化锰矿物,在各氧化锰矿物中含量波动较大;隐钾锰矿和水钠锰矿是矿石中银的主要富集体。
Amorphous converted manganese oxide minerals,the most complex minerals in the natural mineral system,have unique crystal chemical properties.By means of XRD,MICRO-XRD,SEM and EDS analysis,the composition and structure of various manganese oxide minerals in the oxidation zone of Beiya gold deposit were studied.The results show that there are six kinds of manganese oxide minerals with different structures of the ore,including birnessite and rancieite with layered structure,pyrolusite with 1×1 tunnel structure;coronadite and cryptomelane with 2×2 tunnel structure;todorokite with 3×3 tunnel structure.The metal ions enter the manganese oxide lattice with certain regularity.Lead tends to enter coronadite and todorokite with 2×2 and 3×3 large tunnel structure.The ion radii of copper and zinc are small and can enter various manganese oxide minerals with great fluctuation in content.Cryptomelane and birnessite are the main silver carrier of the ore.
作者
梁冬云
邱显扬
蒋英
李波
李美荣
LIANG Dong-yun;QIU Xian-yang;JIANG Ying;LI Bo;LI Mei-rong(Guangdong Academy of Sciences,Institute of Resources Comprehensive Utilization,Guangzhou 510650,China;State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,Guangzhou 510650,China;Guangdong Provincial Key Laboratory of Development&Comprehensive Utilization of Mineral Resources,Guangzhou 510650,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2020年第10期2444-2456,共13页
The Chinese Journal of Nonferrous Metals
基金
广东省科学院实施创新驱动发展能力建设专项资金资助项目(2017GDASCX-0301)
广东省科技计划资助项目(2017B030314046)。
关键词
氧化带金矿
锰矿物类型
晶体化学
隧道结构
负载有价金属
oxidized gold deposit
manganese minerals types
crystal chemistry
tunnel structure
loaded valuable metals
