CAJ | 학술논문

在更新世，黄土高原经历了若干堆积一侵蚀旋回。其中黄土堆积主要发生在冷干期，而强烈土壤侵蚀发生的环境条件至今尚无统一认识，其确定对了解黄土高原地貌的演化过程和更新世侵蚀期的求得均具有重要意义。通过对比黄土高原侵蚀模数分布图与新构造运动分区图，得出侵蚀模数高值区与构造抬升强烈区并不吻合．推断黄土高原侵蚀期发生的主要原因不是构造抬升。在野外考察中，寻找了多个侵蚀面，并与邻近较为完整的黄土一古土壤剖面进行比照，发现侵蚀面主要存在于黄土层上部，其上覆的古土壤层一般保存完整，说明土壤侵蚀主要发生在黄土层，即气候由冷干向暖湿的过渡时期。这一结论为求取黄土高原第四纪侵蚀期提供了理论依据。
재경신세，황토고원경력료약간퇴적일침식선회。기중황토퇴적주요발생재랭간기，이강렬토양침식발생적배경조건지금상무통일인식，기학정대료해황토고원지모적연화과정화경신세침식기적구득균구유중요의의。통과대비황토고원침식모수분포도여신구조운동분구도，득출침식모수고치구여구조태승강렬구병불문합．추단황토고원침식기발생적주요원인불시구조태승。재야외고찰중，심조료다개침식면，병여린근교위완정적황토일고토양부면진행비조，발현침식면주요존재우황토층상부，기상복적고토양층일반보존완정，설명토양침식주요발생재황토층，즉기후유랭간향난습적과도시기。저일결론위구취황토고원제사기침식기제공료이론의거。
During the Pleistocene, the Loess Plateau had experienced a number of accumulation - erosion cycles. Accumulation mainly occurs in the cool -dry periods; however, there is no uniform understanding on environmental conditions in which intensive soil erosion occurred. The determination of the latter is of great significance for the understanding of the landform evolution during Pleistocene of the Loess Plateau and to obtain erosion periods. By comparing the modulus distribution map and Neotectonits division map on the Loess Plateau, it is found that the area where bears high erosion modulus do not consistent with the area where experiencing strong tectonic uplift, which could be inferred that Neotectonics is not the main reason of intensive soil erosion on the Loess Plateau. After field survey, a number of erosion surfaces and some relatively complete loess - paleosol sequences nearby were found, erosion surfaces mainly on the upper part of loess layer, while the paleosol layer above keeps intact, indicating soil erosion mainly occurred to the loess layer. The environmental condition is climate transition period from cool - dry to warm - wet. This conclusion delivered theoretical basis for obtaining erosion periods during the Quaternary on the Loess Plateau.