CAJ | 학술논문

老挝爬立山铁矿位于长山褶皱带北西端,为一个大型矽卡岩型铁矿床。铁矿化产于二长花岗斑岩的内、外接触带。二长花岗斑岩具有富碱,硅、铝过饱和的特征,属钙碱性岩。微量元素配分模式与正常大陆弧花岗岩类似,稀土配分模式为右倾轻稀土富集型,正铕异常,轻重稀土分馏明显,属下地壳重熔被动侵位形成的“S”型花岗岩。岩体U-Pb年龄为283±2．9Ma,侵位时间为早二叠世。爬立山铁矿床潜在资源量巨大,外围地区具有相同类型铁矿床的找矿远景。
로과파립산철광위우장산습추대북서단,위일개대형석잡암형철광상。철광화산우이장화강반암적내、외접촉대。이장화강반암구유부감,규、려과포화적특정,속개감성암。미량원소배분모식여정상대륙호화강암유사,희토배분모식위우경경희토부집형,정유이상,경중희토분류명현,속하지각중용피동침위형성적“S”형화강암。암체U-Pb년령위283±2．9Ma,침위시간위조이첩세。파립산철광상잠재자원량거대,외위지구구유상동류형철광상적조광원경。
The PhuPhaLek iron deposit, Laos in the northwestern part of the Truongson fold belt occurs as a large-sized skarn-type iron deposit. The mineralization occurs within the inner-outer contact zone of monzonite granite porphyries. The monzonite granite porphyries have enriched alkali and oversaturated Si and Al, and are assigned to the calc-alkaline rocks. The trace element distribution patterns are similar to those of the normal continental arc granites. The rare earth element distribution patterns display right-leaning LREE-enriched patterns with positive Eu anomaly and marked fractionation of LREE and HREE, suggesting the “S”-type granites created by the remelting and intrusion of the lower crust melts. The SHRIMP U-Pb age of 283 ± 2. 9 Ma indicates that the emplacement took place during the Early Permian.