CAJ | 학술논문

密切结合勘探实际，以钻井、测井等地质资料为主要依据，以鄂尔多斯盆地东部奥陶系风化壳为对象，以多学科的地质理论与技术方法为指导，结合盆地构造演化，通过对奥陶系不整合侵蚀面上下地层组合情况的深入分析，把印模法与残厚法结果有机结合，深入探讨了奥陶系风化壳古地貌恢复的方法思路及其古地貌发育特征，探索了古地貌恢复的新方法综合法，建立了解释和恢复古地貌单元属性的综合地质模型。研究结果表明：盆地东部奥陶系侵蚀不整合面上下的地层组合可以分别被划分为上薄下薄、上厚下厚、上厚下薄、上薄下厚4种基本型式以及上次厚下次薄、上次薄下次薄、上次薄下次厚、上次厚下次厚等8种子模型；相应的古地貌解释包括了岩溶高地、岩溶斜坡、岩溶盆地3个二级古地貌单元以及残丘、台地、残台、阶坪、沟谷、浅洼、深洼等11个三级古地貌单元。岩溶高地出现于研究区西南角，分布局限；岩溶斜坡占据了研究区的大部分，其主力地貌单元为斜坡台地与斜坡阶坪；岩溶盆地位于研究区东部，其主力地貌单元为盆地浅洼。
밀절결합감탐실제，이찬정、측정등지질자료위주요의거，이악이다사분지동부오도계풍화각위대상，이다학과적지질이론여기술방법위지도，결합분지구조연화，통과대오도계불정합침식면상하지층조합정황적심입분석，파인모법여잔후법결과유궤결합，심입탐토료오도계풍화각고지모회복적방법사로급기고지모발육특정，탐색료고지모회복적신방법종합법，건립료해석화회복고지모단원속성적종합지질모형。연구결과표명：분지동부오도계침식불정합면상하적지층조합가이분별피화분위상박하박、상후하후、상후하박、상박하후4충기본형식이급상차후하차박、상차박하차박、상차박하차후、상차후하차후등8충자모형；상응적고지모해석포괄료암용고지、암용사파、암용분지3개이급고지모단원이급잔구、태지、잔태、계평、구곡、천와、심와등11개삼급고지모단원。암용고지출현우연구구서남각，분포국한；암용사파점거료연구구적대부분，기주력지모단원위사파태지여사파계평；암용분지위우연구구동부，기주력지모단원위분지천와。
Combineing closely the practical exploration and guided by multidisciplinary geological theory and technology, a comprehensive geological model has been set up to explain and restore paleogeomorphology unit attributes of the Ordovician weathering crust of eastern Ordos basin. Meanwhile,according to drilling and logging geologic data, authors also combine basin tectonic evolution with results of “impression method” organic integration and results of “residual thick method”, discuss the methods and thinking of Ordovician weathering crust paleogeomorphology restoration,and its ancient landscape development characteristics through in-depth analysis of the stratigraphic combination under and above Ordovician unconformity erosion surface,and explore a new method of palaeogeomorphologic reconstruction-“synthetic method”.The research results show that the stratigraphic combination,under and above Ordovician unconformity erosion surface in the eastern of Ordos basin,can be divide into four basic types including “up thin down thin”,“up thick down thick”,“up thick down thin”,“up thin down thick”,and eight sub models which were “up relative thickening down relative thinning”,“up relative thinning down relative thinning”,“up relative thinning down relative thickening ”, “up relative thickening down relative thickening ”, etc. The corresponding paleogeomorphology explanation includes three two-level paleogeomorphology units as karst highland, karst slope, karst basin,and eleven three-level paleogeomorphology units including monadnock, tableland,residual tableland,level terrace,cheuch,shallow depression,deep depression etc.The Karst highlands occurs restrictively in the southwestern research area.The Karst slope occupies most of the study area where the main paleogeomorphology units were slope tableland and slope level terrace.The Karst basin is located in the eastern study area and the main paleogeomorphology units include basin shallow depression.