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云南离子吸附型稀土矿成矿规律
Received:September 21, 2019  Revised:October 28, 2019  点此下载全文
Cite This Paper:LU Lei,WANG Denghong,WANG Chenghui,ZHAO Zhi,FENG Wenjie,XU Xiaochun,CHEN Chen,ZHONG Hairen.2020.The metallogenic regularity of ion- adsorption type REE deposit in Yunnan Province[J].Acta Geologica Sinica,94(1):179-191
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Author NameAffiliationE-mail
LU Lei 1) MNR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources,Chinese Academy of Geological Sciences, Beijing, 1000372) School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009 kasablina@163.com 
WANG Denghong 1) MNR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources,Chinese Academy of Geological Sciences, Beijing, 100037 wangdenghong@vip.sina.com 
WANG Chenghui 1) MNR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources,Chinese Academy of Geological Sciences, Beijing, 100037  
ZHAO Zhi 1) MNR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources,Chinese Academy of Geological Sciences, Beijing, 100037  
FENG Wenjie 3) Yunnan Geological Survey Bureau, Kunming, 650051  
XU Xiaochun 2) School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009  
CHEN Chen 1) MNR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources,Chinese Academy of Geological Sciences, Beijing, 100037  
ZHONG Hairen 4) School of Earth Sciences and Resources, China University of Geoscience, Beijing 100083  
基金项目:本文为中国地质调查局“中国矿产地质志”项目(编号 DD20160346、DD20190379),“战略性新兴产业矿产调查”工程“松潘 甘孜成锂带锂铍多金属大型资源基地综合调查评价”项目(编号 DD20190173),“大宗急缺矿产和战略性新兴产业矿产”工程“华南重点矿集区稀有稀散和稀土矿产调查”项目(编号 DD20160056)及国家重点研发计划“我国锂能源金属成矿规律、靶区优选与重点查证”课题(编号2017YFC0602701)资助的成果。
中文摘要:云南的离子吸附型稀土矿(iRee)主要分布于滇西南一带,临沧岩体是近年来找矿进展最大、关注度最高的地区。与南岭地区iRee矿床最大的区别是矿床海拔均在1000m以上,属于高原低山丘陵地貌环境下形成的风化壳型矿床;成矿岩体沿“三江”断裂旁侧展布;岩性以二长花岗岩和钾长花岗岩为主,多呈中粗粒结构;成岩锆石U- Pb年龄集中分布于208~240Ma和52~80Ma两个区间;按轻重稀土在基岩中的配分,可将基岩分为LREE型和HREE型;前者主要富集轻稀土,后者重稀土相对富集;局部富集HREE的LREE型基岩形成的风化壳,是目前云南发现重稀土异常的主要类型,有可能成为今后寻找HREE矿床的主要目标。含稀土矿物存在与否对REE成矿的贡献具有举足轻重的意义;除斜长石、黑云母和角闪石等造岩矿物中含少量REE外,含稀土副矿物是基岩REE的重要来源;基岩交代作用类型和强度不同决定了含稀土矿物的丰富程度和矿化强度;如早期交代作用主要产生铈硅磷灰石、铈萤石和氟碳铈矿等含LREE的矿物;随着交代作用的增强,HREE的活化作用增强,则产生如高钇钍石、钇萤石和氟碳钇矿等矿物;在风化作用下易破碎解离的含稀土矿物如榍石、褐帘石和氟碳酸盐矿物等是矿床中Ree3+的主要来源。含矿风化壳的物质组成可分为碎屑矿物、黏土矿物和副矿物三类,黏土矿物是风化壳中Ree3+的主要载体;完整的花岗岩风化壳从表土层→全风化层→半风化层→微风化层都有发育,全风化层是主要的含矿层;根据稀土在风化壳中的分布特征,可分为“弓背式”、“喇叭式”和“波浪式”;因表土层厚度的不同,又可分为“深潜式”和“表露式”。Ree 3+ 在风化壳中的迁移与富集除受控于基岩、地貌、环境等因素外;持续反复的风化作用也是影响Ree 3+ 富集成矿的重要因素。
中文关键词:稀土  云南  离子吸附型稀土矿  稀土矿物
 
The metallogenic regularity of ion- adsorption type REE deposit in Yunnan Province
Abstract:4) School of Earth Sciences and Resources, China University of Geoscience, Beijing 100083
keywords:REE  Yunnan  iREE type deposit  REE minerals
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