CAJ | 학술논문

郗山和龙宝山稀土矿具有相似的成矿地质背景、控矿岩体特征及矿床地质特征.燕山早期碱性侵入岩与稀土矿关系密切,稀土矿体主要赋存于杂岩体内及其附近围岩中;稀土元素和同位素研究表明,含矿质的富碱岩浆可能属壳幔混源型,碱性岩浆及成矿物质最初可能都来源于上地幔同一部位,而在岩浆上侵过程中同化混染了地壳物质.郗山稀土矿为单一富轻稀土矿床,矿脉类型以含稀土石英重晶石碳酸盐脉为主,含稀土矿物以氟碳铈矿和氟碳钙铈矿为主,碳酸铈钠矿和菱钙锶铈矿属国内首次发现.龙宝山稀土矿为稀土、金共生矿,矿脉类型主要为石英脉和硅化角砾岩;含稀土矿物主要有氟碳铈矿、氟碳铈镧矿、氟碳钙铈矿;金矿物有自然金、银金矿等.成矿时代稍晚于岩浆岩形成时代,属中生代燕山晚期;矿床成因类型为碱性岩浆期后中-低温热液稀土矿床.
치산화룡보산희토광구유상사적성광지질배경、공광암체특정급광상지질특정.연산조기감성침입암여희토광관계밀절,희토광체주요부존우잡암체내급기부근위암중;희토원소화동위소연구표명,함광질적부감암장가능속각만혼원형,감성암장급성광물질최초가능도래원우상지만동일부위,이재암장상침과정중동화혼염료지각물질.치산희토광위단일부경희토광상,광맥류형이함희토석영중정석탄산염맥위주,함희토광물이불탄시광화불탄개시광위주,탄산시납광화릉개송시광속국내수차발현.룡보산희토광위희토、금공생광,광맥류형주요위석영맥화규화각력암;함희토광물주요유불탄시광、불탄시란광、불탄개시광;금광물유자연금、은금광등.성광시대초만우암장암형성시대,속중생대연산만기;광상성인류형위감성암장기후중-저온열액희토광상.
Rare earth deposits in the Chishan and Longbaoshan area have similar geological mineralization background, ore-controlling characteristics and deposit geological characteristics. Alkaline intrusive rock in early Yanshan period is closely related to rare earth elements deposits. Rare earth orebodies occur mainly in complex and country rocks. Study on rare earth elements and isotope results shows that ore-bearing alkaline concentrated magma likely belongs to crust-mantle magma source mixed type, and alkaline magma and ore-forming materials may be derived from the same parts of the mantle, and crust materials were mixed and assimilated in the magma intrusion. Chishan rare earth deposit is a single light REE enriched deposit, with REE-bearing quartz carbonate veins as major ore types. Ore-bearing minerals are dominated by bastnasite and parisite, and Ce-carbonate and Ca-strontianite were firstly discovered in China. Longbaoshan rare earth deposit is characterized by a paragenetic deposit between rare earth and gold ores. Quartz veins and silicified breccia veins are its major vein types;rare-earth bearing minerals are composed mainly of bastnaesite, Ce- and La-bearing bastnasite, and parisite. Gold minerals include native gold and silver gold. Ore-forming period was later than that of the formation of igneous rocks and belongs to late Mesozoic Yanshan period. The genesis of deposit is low or medium temperature alkaline magmatic hydrothermal rare earth deposit.