CAJ | 학술논문

磁化率各向异性（Anisotropy of Magnetic Susceptibility：AMS）能揭示沉积物中磁性矿物的定向排列，用于判定水流大小和方向变化。目前，关于沉积微相的磁化率各向异性研究仍较少。本文通过对台儿沟东剖面进行高分辨率磁化率各向异性研究，发现各沉积微相和亚相的磁化率各向异性较大差异，对于水动力较大的沉积微相，如分支河道、水下支流河道、河口砂坝等，其磁化率和磁化率各向异性度相对较大；对于水动力较小的沉积微相，如分支间湾、天然堤等，磁化率和磁化率各向异性度次之；对于滨浅湖、前三角洲泥、沼泽等静水环境，磁化率和磁化率各向异性度最小。根据各沉积微相或亚相χ与 P 的相关系数变化，可将河湖相地层分为两段：其中，在7．8～90m深度范围内，χ与 P 的相关系数为正值；在之下90～130m 深度范围内，χ与 P 的相关系数主要为负值。与郝家台、东谷坨剖面磁化率各向异性结果相似，台儿沟东剖面各沉积微相和亚相的磁化率最大轴主要倾向 NNE 和 NNW 方向，而磁化率最小轴主要倾向 SW 方向，表明泥河湾盆地的物源除了可能来自盆地东部外，还可能来自盆地西南部。
자화솔각향이성（Anisotropy of Magnetic Susceptibility：AMS）능게시침적물중자성광물적정향배렬，용우판정수류대소화방향변화。목전，관우침적미상적자화솔각향이성연구잉교소。본문통과대태인구동부면진행고분변솔자화솔각향이성연구，발현각침적미상화아상적자화솔각향이성교대차이，대우수동력교대적침적미상，여분지하도、수하지류하도、하구사패등，기자화솔화자화솔각향이성도상대교대；대우수동력교소적침적미상，여분지간만、천연제등，자화솔화자화솔각향이성도차지；대우빈천호、전삼각주니、소택등정수배경，자화솔화자화솔각향이성도최소。근거각침적미상혹아상χ여 P 적상관계수변화，가장하호상지층분위량단：기중，재7．8～90m심도범위내，χ여 P 적상관계수위정치；재지하90～130m 심도범위내，χ여 P 적상관계수주요위부치。여학가태、동곡타부면자화솔각향이성결과상사，태인구동부면각침적미상화아상적자화솔최대축주요경향 NNE 화 NNW 방향，이자화솔최소축주요경향 SW 방향，표명니하만분지적물원제료가능래자분지동부외，환가능래자분지서남부。
Anisotropy of magnetic susceptibility (AMS)can reveal preferred alignment of various magnetic minerals and be used for inferring flow velocity and direction.Presently,the study of AMS on sedimentary microfacies is rare.Here we conducted a high-resolution AMS research on sedimentary facies in the eastern Taiergou section and found the facies display different charaters on AMS.For high hydrodynamic sedimentary microfacies,such as river-mouth bar,subaqueous distributary channels,et al.,they have high susceptibility value and anisotropy degree;for lower hydrodynamic sedimentary microfacies,such as inter-distributary bays,natural levee,et al.,they have lower susceptibility value and anisotropy degree;for static-water sedimentary microfacies, such as prodelta,swamps,et al.,they have lowest susceptibility value and anisotropy degree.Based on the χ—P correlation coefficient of microfacies,the section can be divided into two stages.In the depth of 7.8 ~90m,theirχ—P correlation coefficients are positive,while in the depth of 90 ~130m,theirχ—P correlation coefficients are almost negative.As similar with the result from Haojiatai and Donggutuo section,the maximum susceptibility axes of microfacies in this study are mostly oriented to the NNE and NNW,indicating the material and the water-flow possibly come from east or south-west.