CAJ | 학술논문

对柴北缘微量元素测试结果表明,Sc、Ti、Cr、Ni、Zn、Cs、La、,Tb、Ho、Lu等元素在半深湖相中的含量明显高于其他沉积环境中的;微量元素同常量元素具有较强的相关性,Cr、Co、Cu、Ni、Cs、La以及La系元素与Ti、Fe呈正相关,而与K、Si、Al呈负相关;鱼25井Ni/Co比值平均为4.22,δCe值平均为3.9,均显示该地区中侏罗世为还原环境.微量元素垂向上的变化反映了鱼25井中侏罗世经历了2个完整的基准面上升一下降的旋回.经测试样品与标样的微量元素对比认为,柴北缘地区的砂岩为基性-中性物源.微量元素对沉积环境分析、找寻烃源岩和油气勘探具有重要意义.
대시북연미량원소측시결과표명,Sc、Ti、Cr、Ni、Zn、Cs、La、,Tb、Ho、Lu등원소재반심호상중적함량명현고우기타침적배경중적;미량원소동상량원소구유교강적상관성,Cr、Co、Cu、Ni、Cs、La이급La계원소여Ti、Fe정정상관,이여K、Si、Al정부상관;어25정Ni/Co비치평균위4.22,δCe치평균위3.9,균현시해지구중주라세위환원배경.미량원소수향상적변화반영료어25정중주라세경력료2개완정적기준면상승일하강적선회.경측시양품여표양적미량원소대비인위,시북연지구적사암위기성-중성물원.미량원소대침적배경분석、조심경원암화유기감탐구유중요의의.
The testing results of trace elements in the northern margin of Qaidam basin show that contents of Sc,Ti,Cr,Ni,Zn,Cs,La,Tb,Ho,Lu in semi-deep lake facies are obviously higher than those in the other sedimentary settings;the Cr,Co,Cu,Ni,Cs,La and La series elements have positive correlations with Ti and Fe,but negative correlations with K,Si,Al;the Ni/Co ratio (4.22) and δCe value (3.9) from Well Yu-25 indicate that the Middle Jurassic is reducing environment.The vertical changes of the trace elements show that the Middle Jurassic in Well Yu-25 experiences two up-down base level cycles.Based on the comparison of trace elements between test samples and standard samples,the sandstone in the northern margin of Qaidam basin is believed to be basic-neutral provenance.It is suggested that trace element is of great significance in sedimentary environment analysis,searching for source rocks and oil-gas exploration.