四川德昌县大陆槽稀土矿Ⅰ号矿体地质特征及矿石质量研究  

The geological characteristics and ore quality research of the No.1 ore body in the Dalucao REE deposit in Dechang County,Sichuan Province

作　　者：官厚江 周海波 周志诚 GUAN Houjiang;ZHOU Haibo;ZHOU Zhicheng(Sichuan Geological and Mineral Resources Group Co.,Ltd.,Chengdu 610016,China;Sichuan Boda Geological Exploration Research Co.,Ltd.,Chengdu 610016,China)

机构地区：[1]四川省地质矿产(集团)有限公司,四川成都610016 [2]四川省博达地质勘查研究有限公司,四川成都610016

出　　处：《中国矿业》2024年第S02期456-461,共6页China Mining Magazine

摘　　要：四川冕宁-德昌稀土成矿带是中国最重要的稀土成矿带之一,其中,冕宁牦牛坪稀土矿和德昌大陆槽稀土矿为该成矿带上矿床规模最大的开发矿山。德昌大陆槽稀土矿位于德昌县城221°方向,平距31.6 km的大陆槽乡。区内大面积出露石英闪长岩,其中多期次侵入了正长岩株(脉)。区内查明有Ⅰ号矿体、Ⅲ号矿体,Ⅰ号矿体为正在开发的主矿体,主要赋存于碱性正长岩和方解石碳酸岩内,呈扁柱状,大型规模。矿石主要为半自形细-中粒结构、碎裂结构,角砾状构造、浸染状构造。有益组分主要为铈和镧,呈氟碳铈矿相产出,伴生有Sr、Ba、F、Pb,有害组分ThO2和U含量微少。REO矿床平均含量3.64%。矿区水文地质条件、工程地质条件、地质环境质量中等。该矿床属隐爆角砾岩型稀土矿床。The Mianning-Dechang rare earth metallogenic belt in Sichuan is one of the most important rare earth metallogenic belts in China,with the Mianning Maoniuping REE deposit and the Dechang Dalucao REE deposit being the largest developed mines on this metallogenic belt.The Dechang Dalucao REE deposit is located in Dalucao Township,31.6 km away from Dechang County town at a bearing of 221°.A large area of quartz diorite is exposed in the region,with multiple stages of intrusion by syenite stocks(veins).Two ore bodies,labeled as No.I and No.III,have been identified in the area.The No.I ore body,which is currently being developed,mainly occurs within alkaline syenite and calcite carbonatite,presenting a flat columnar shape and large scale.The ore primarily consists of semiautomorphic fine-medium grained structures,cataclastic textures,conglomerate fabrics,and disseminated textures.The beneficial components are mainly cerium and lanthanum,occurring in the form of fluorocarbon cerium mineral,accompanied by Sr,Ba,F,Pb,while the harmful components ThO2 and U are present in trace amounts.The average REO content of the deposit is 3.64%.The hydrogeological conditions,engineering geological conditions,and geological environmental quality of the mining area are moderate.This deposit is classified as a crypto explosive breccia type REE deposit.

关 键 词：大陆槽稀土矿 碱性正长岩 扁柱状 氟碳铈矿 隐爆角砾岩型 

分 类 号：TD11[矿业工程—矿山地质测量]