王利民,陈佩.陕西凤县九子沟岩体稀土钪赋存状态及成因浅析[J].西北地质,2020,53(3):86-92 WANG Limin,CHEN Pei.On the Occurrence and Genesis of Rare Earth and Scandium in Jiuzigou Rock Mass of Fengxian County, Shaanxi Province[J].Northwestern Geology,2020,53(3):86-92
陕西凤县九子沟岩体稀土钪赋存状态及成因浅析
On the Occurrence and Genesis of Rare Earth and Scandium in Jiuzigou Rock Mass of Fengxian County, Shaanxi Province
投稿时间:2019-12-04  修订日期:2020-04-01
DOI:10.19751/j.cnki.61-1149/p.2020.03.007
中文关键词:  九子沟岩体;稀土钪;赋存状态;成矿规律
英文关键词:Jiuzigou rock-mass;rare earth and scandium;occurrence;metallogenetic regularity
基金项目:陕西省地质勘查基金项目“陕西省凤县黄牛铺镇九子沟一带稀土矿地质调查”(61201506314)
作者单位
王利民 陕西地矿物化探队有限公司, 陕西 西安 710043 
陈佩 陕西地矿物化探队有限公司, 陕西 西安 710043 
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中文摘要:
      九子沟岩体为基性-超基性杂岩体,主要由磷灰石黑云母透辉石岩、正长岩及橄榄岩组成。稀土钪赋存于磷灰石黑云母透辉石中,岩体内部载体矿物为褐帘石及磷灰石。通过深部勘查发现,稀土钪矿在岩体内部是以独立矿物和类质同象的形式存在,在岩体风化壳中稀土钪以独立矿物、类质同象及离子状态的形式存在。矿石中稀土主要为轻稀土La、Ce、Pr、Nd、Sm及重稀土Gd、Y。稀土平均品位为0.07%,Sc平均品位为40×10-6。九子沟稀土钪矿成因类型为超基性岩型稀土钪矿,为幔源结晶型。形成时期为加里东期。研究稀土钪的赋存状态及成矿规律对本区稀土钪的地质找矿和选矿具有指导意义。
英文摘要:
      Jiuzigou rock-mass is a basic-ultrabasic complex, mainly composed of apatite-biotite-pyroxenite, syenite and peridotite. Rare earth and scandium occur in apatite-biotite-pyroxenite, and the bearing minerals are orthite and apatite. Through deep exploration, it is found that rare earth and scandium exists in forms of independent mineral and isomorphism in inner rock mass, while in forms of independent mineral, isomorphism and ionic state in weathering crust. The main rare earth elements in the ore are La, Ce, Pr, Nd, Sm and heavy rare earth elements Gd, Y. The average grade of rare earth (REO) is 0.07%, scandium (Sc) 40×10-6. The genetic type in Jiuzigou is ultrabasic rock of the rare earth and scandium deposit, and the mantle source crystallization type. It was formed during the Caledonian. The study of the occurrence state and metallogenetic regularity is of guiding importance to the exploration and processing of deposits of rare earth and scandium in this area.
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