翠华山国家地质公园水湫池成因新解

目的为了进一步探讨翠华山国家级地质公园中水湫池景区的形成原因,推动国家地质公园的建设与发展。方法实地考察、结合沉积物粒度分析及历史文献资料考证。结果发现组成水湫池堰塞坝的沉积物具有典型的泥砾结构;堰塞坝体外围的崩塌堆积,不仅是多期和多种成因崩塌活动的结果,而且现存的崩积砾石都覆盖在堰塞坝表面的古地形面上,层序关系表明其形成时间晚于堰塞坝。结论水湫池不是崩塌堆积堰塞成湖的,可能是碎屑(泥石)流堆积形成的,据文献资料考证,水湫池形成并非在唐代,而应在北周以前。

A new view of the genesis of Shuiqiu pool in Cuihua Mountain national Geo-Park

Aim To study the cause of formation of Shuiqiu pool standing in Cuihua Mountain national geo-park for presenting the struction and development of national geo-park.Methods Field research and aggradation lab analysis,historical data textual research.Results It was discovered that the weir dam of Shuiqiu pool is made of by the deposits with typical structure of mud and gravel,the cause of formation is the accumulation of debris flow deposits with glutinosity gravity flow.The collapse deposits of the 3 scenic spots around the Shuiqiu pool have different properties of the formation structure,which implies that they were not formed in a collapse activity,but several of them.The existing collapsed stones over the ancient surface of weir dam,the relationship of the order of the layers implies they emerged later than the dam.Conclusion The Shuiqiu pool was not formed by the weir of the collapse deposits,but by the weir dam of the debris flow.Shuiqiu pool had been existing at least before Beizhou dynasty according to the historical data studying.