CAJ | 학술논문

选择江汉盆地中心位置的 ZL 钻孔，利用 ICP-MS 方法，对钻孔岩心微量元素组成进行了 R 因子分析，研究了新近纪以来江汉盆地沉积物物源的变化。结果表明：2.77～2.68 Ma B.P.期间，江汉盆地沉积物微量元素组成表达了一种近源为主的沉积过程；2.68～2.23 Ma B.P.期间，江汉盆地碎屑沉积受长英质类物源供给影响较为明显；2.23～1.25 Ma B.P.时期及1.25 Ma B.P.以来的沉积物微量元素特征都表现出受铁镁质岩体影响的特征，推测这一阶段有较大面积基性岩体分布的长江上游流域可能已经成为江汉盆地的物源供给者。
선택강한분지중심위치적 ZL 찬공，이용 ICP-MS 방법，대찬공암심미량원소조성진행료 R 인자분석，연구료신근기이래강한분지침적물물원적변화。결과표명：2.77～2.68 Ma B.P.기간，강한분지침적물미량원소조성표체료일충근원위주적침적과정；2.68～2.23 Ma B.P.기간，강한분지쇄설침적수장영질류물원공급영향교위명현；2.23～1.25 Ma B.P.시기급1.25 Ma B.P.이래적침적물미량원소특정도표현출수철미질암체영향적특정，추측저일계단유교대면적기성암체분포적장강상유류역가능이경성위강한분지적물원공급자。
Taking drillinghole ZL located at the center of Jianghan Basin as an example,with method of ICP-MS,the R factor of trace element compositions of cores from the hole is analyzed to reveal sediment sources’changes in Jianghan Basin since Quaternary in this paper.The results show that during 2.77 to 2.68 Ma B.P., the deposition process is mainly near source according to trace element compositions of sediments in Jianghan Basin;during 2.68 to 2.23 Ma B.P.the clastic deposition in Jianghan Basin is obviously affected by felsic;during 2.23 to 1.25 Ma B.P.and since 1.25 Ma B.P.the trace element of sediments is affected by Fe-Mg rocks,and it is indicated that the upper reaches of the Yangtze River which has a large-scale basic rocks distri-bution is the source provider of Jianghan Basin.