塔里木盆地轮古东地区前石炭纪古岩溶微地貌及岩溶发育模式

发布时间：2018-11-15 17:34

【摘要】：以现代岩溶理论为指导,应用"印模与残厚组合法"恢复岩溶古地貌,在4种二级地貌类型(岩溶高地、岩溶陡坡地、岩溶缓坡地和岩溶盆地)划分的基础上,将塔里木盆地轮古东地区前石炭纪古岩溶地貌进一步划分为峰丛洼地、丘峰谷地、溶丘洼地、峰丛垄脊沟谷、峰丘洼地、丘丛垄脊沟谷、岩溶谷地、溶丘平原等8种三级地貌类型。并在垂向岩溶分带研究的基础上,明确了不同古岩溶地貌条件下的岩溶发育特征及充填机制。研究认为:岩溶高地为区域补给区,发育溶蚀裂缝和溶洞系统;岩溶陡坡地为补给-径流区,以高角度溶蚀裂缝为主;岩溶缓坡地为地下水径流区,发育暗河管道系统;岩溶盆地为排泄区,岩溶缝洞充填程度高。
[Abstract]:Under the guidance of modern karst theory, the method of combination of impression and residual thickness is used to restore karst paleogeomorphology. On the basis of the classification of four types of landforms (karst highlands, karst steep slopes, karst gentle slopes and karst basins), the karst paleogeomorphology is restored. The Paleokarst landforms of the Luangu East area of the Tarim Basin are further divided into peak cluster depression, hill valley, dissolved hill depression, peak ridge valley, peak hill depression, hill ridge valley, karst valley, and so on. There are 8 kinds of three-level geomorphologic types, such as dissolving hill plain. On the basis of the study of vertical karst zonation, the characteristics of karst development and filling mechanism under different paleokarst landforms are clarified. The study shows that karst highlands are regional recharge areas with dissolution cracks and cave systems developed; karst steep slopes are recharge-runoff areas dominated by high angle dissolution fractures; karst gentle slopes are groundwater runoff areas and develop underground river pipeline system; Karst basin is a drainage area with high filling degree of karst fractures and cavities.
【作者单位】：中国地质大学(武汉)环境学院;中国地质科学院岩溶地质研究所/国土资源部岩溶动力学重点实验室;中国石油塔里木油田分公司勘探开发研究院;
【基金】：国家自然科学基金“塔里木盆地高温高压奥陶系碳酸盐岩溶蚀机理研究”(41302122) 国家“973计划”项目课题“地表和近地表条件下岩溶缝洞充填过程及机理研究”(2011CB201001) 国土资源部公益性行业科研专项“塔里木古潜山奥陶系风化壳油藏岩溶储层预测”(201211082) 中国地质调查局项目“红水河上游岩溶流域1:5万水文地质环境地质调查”(DD20160300)共同资助
【分类号】：P618.13;P931.5

【参考文献】