CAJ | 학술논문

对麻布岗火山盆地岩石地球化学特征、成矿地质条件的分析对以后寻找多金属矿床具有重要意义，本文对麻布岗火山盆地的岩石地球化学特征、稀土元素地球化学特征、Pb同位素地球化学特征等地球化学资料及盆地内成矿地质条件进行了分析研究。研究表明：盆地内岩石具高K高Ca、准铝质‐过铝质性质，微量元素大离子亲石元素Rb、Sr富集，放射性U含量高，表明岩体可能在伸展的构造环境下形成，且受地壳重熔作用影响，岩石岩浆结晶分异程度很高；稀土元素地球化学特征表现出与华南地壳重熔岩浆关系逐步加强，且盆地内火山岩表现出它们具有相同的岩浆源区；Pb同位素组成稳定，反映出成矿物质主要来源于上地壳。结合区内良好的成矿地质条件综合分析认为：麻布岗火山盆地地区具有寻找中‐大型多金属矿床的前景。
대마포강화산분지암석지구화학특정、성광지질조건적분석대이후심조다금속광상구유중요의의，본문대마포강화산분지적암석지구화학특정、희토원소지구화학특정、Pb동위소지구화학특정등지구화학자료급분지내성광지질조건진행료분석연구。연구표명：분지내암석구고K고Ca、준려질‐과려질성질，미량원소대리자친석원소Rb、Sr부집，방사성U함량고，표명암체가능재신전적구조배경하형성，차수지각중용작용영향，암석암장결정분이정도흔고；희토원소지구화학특정표현출여화남지각중용암장관계축보가강，차분지내화산암표현출타문구유상동적암장원구；Pb동위소조성은정，반영출성광물질주요래원우상지각。결합구내량호적성광지질조건종합분석인위：마포강화산분지지구구유심조중‐대형다금속광상적전경。
Analysis of the metallogenic geological conditions and geochemical characteristics of polymetallic deposits in Mabugang basin ,which is important for search for polymetallic deposit in the future .Based on the research of the petrological peculiarities and geochemical characteristics of REE ,Pb isotope geochemistry and the ore‐forming geological conditions ,research shows that :the rocks in the basin with high K and high Ca ,metaluminous to peraluminous nature ,large ion lithophile element in the trace elements Rb ,Sr enrichment ,content of radioactive U ,shows that the rock mass maybe formed in the extensional structural environment ,and it’s affected by the anatexis of the crust ,the rocks and magmatic crystallization differentiation degree highly ,characteristics of REE exhibited with remelting magma relations gradually strengthen of the Southern China crust ,and within the basin volcano rocks show they have the same magma source region ;stable Pb isotope compositions ,reflecting the minerals mainly come from upper crust .With the comprehensive analysis of the metallogenic geological condition is superior in the region that :with the prospect of finding middle or large polymetallic deposits around it .