福建石牛山水蚀花岗岩石蛋地貌特征及成因研究

石牛山主峰出露晚白垩世石牛山组晚期侵入相钾长花岗斑岩,山体浑厚壮观,石蛋千姿百态。石蛋、石堡及崖壁上分布着深浅不一的石脊、石槽及大小不同的石臼、石盆、石穴等微地貌,构成独具特色的“水蚀花岗岩石蛋地貌”。经研究,钾长花岗斑岩是形成水蚀花岗岩石蛋的物质基础,风化剥蚀、大气降水击蚀及其流水侵蚀是形成石脊、石槽、石臼、石盆、石穴的主要外动力地质作用。

On the Landform Characteristics and Genesis of Waterworn Granite Pebbly in the Shinui Hill, Fujian Province

The intrusive potash feldspar granite porphyry of Late Cretaceous Shinuishan Formation is distributed over the main peak of Shinuishan Mountain.The Mountain presents magnific and spectacular and the granite pebbly in the surveyed area show all kinds of strange shapes.The many microtopography such as different depth of stone ridges and stone cisterns and(different) sizes of stone mortals,basin-shaped rocks and rock hollows can be found on the granite pebbly,fort-shaped rocks and rock walls,which are composed of a particular(waterworn) granite pebbly landform.It is considered by researches that the potash feldspar granite porphyry is the material basis of forming the waterworn granite pebbly and the weathering,denudation,true brinelling bruising by atmospheric water and the water erosion are the main external powers of forming rock ridges,stone cisterns,stone mortal,basin-shaped rocks and stone hollows.