对溪洛渡工程库首区喀斯特洞穴发育的新认识①

在讨论地质背景与洞穴发育关系的基础上，结合洞穴中冲、溶蚀形态特征、第四纪不同时期的沉积物剖面及沉积旋回分析、粒度分析、砾石统计等资料，系统分析了洞穴发育过程中的古水流方向。测年资料表明，多层洞穴不同时代的堆积物记录，反映了新构造运动和气候波动对洞穴发育的控制作用，为评价洞穴的发育规模、展布方向及对工程的影响，提供了可靠的科学依据。

NEW KNOWLEDGE ONDEVELOPMENT OF KARST CAVE IN XILUODU RESERVOIR HEAD AREA

This paper discusses the paleocurrent's direction in the process of cave development,based on the relationship between geological setting and development of the caves and the data about scouring/solution morphological character,Quaternary stratigraphic profiles,depositional cycle analysis,grading analysis and gravel satistics.The deposits in multistoried caves record and reflect that neotectonic movement and climatic change had controlled the development of the caves,which is also indicated by dating data.All of these give reliable evidence for predicting the size and distribution of karst caves and their influence to the engineering.