CAJ | 학술논문

十万大山盆地盖层划分是根据印支运动第三幕－龙华运动造成的中三叠系不整合面为界线划分的，包括上三叠系、侏罗系、白垩系以及第三系的陆相和下部一部分海陆过渡相的沉积物。凤凰山剖面出露侏罗系地层，从下往上依次为百姓组和那荡组。对剖面样品进行微量稀土元素参数分析， Th－Sc－Zr／10判别图解指示碎屑岩形成的构造背景为大陆岛弧环境。δEu、δCe及V／（ V＋Ni）比值表明当时沉积环境以厌氧的弱还原环境为主。
십만대산분지개층화분시근거인지운동제삼막－룡화운동조성적중삼첩계불정합면위계선화분적，포괄상삼첩계、주라계、백성계이급제삼계적륙상화하부일부분해륙과도상적침적물。봉황산부면출로주라계지층，종하왕상의차위백성조화나탕조。대부면양품진행미량희토원소삼수분석， Th－Sc－Zr／10판별도해지시쇄설암형성적구조배경위대륙도호배경。δEu、δCe급V／（ V＋Ni）비치표명당시침적배경이염양적약환원배경위주。
The classification of cover in shiwandashan basin is according to the third act of the indosinian movement -longhua movement caused the formation of unconformity surface as the lines between, including on the upper triassic, jurassic, cretaceous and tertiary continental and the marine sediments in the transitional phase on lower part.Phoenix mountain profile exposed Jurassic stratum, from down to up in turn baixing group and the nadang group.Analysis of trace-rare earth elements parameters of profile samples, Th -Sc -Zr/10 discrimination diagram indicating the structural setting of clastic rock is continental island arc environment.δEu, δCe and V/( V +Ni ) ratio show that the sedimentary environment is given priority with anaerobic weak reduction environment.