Explaining Hummocky Cross-stratification Based on the Theory of Standing Wave: A case from Jiayuan Group storm deposits in Xuzhou
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摘要: 丘状交错层理作为鉴别风暴沉积重要的标志之一，是最能反映风暴作用的沉积构造。本文基于驻波理论对丘状交错层理成因进行了新的解释，提出了丘状交错层理形成于驻波波节部位，形成丘状交错层理（或驻波）的动能近似恒定的观点。通过理论计算解释了丘状交错层理随水深变浅波长逐渐变长，波高逐渐减小，波长/波高逐渐增大的趋势，解释了徐州地区贾园组风暴沉积序列中丘状交错层理随水深的变化规律，从而验证了理论的可行性，对沉积环境具有一定的指示意义。Abstract: Hummocky cross-stratification, as one of the marks of the identification of storm deposits, can reflect the sedimentary structures of turmoil best. The paper, based on the standing wave theory to explain the origin of hummocky cross-stratification, has proposed the view of hummocky cross-stratification forming in the node and the kinetic energy of formation of hummocky cross-stratification or standing wave is approximately constant.Through calculation,explained that the wavelength is longer,the wave height is shorter and the wavelength/wave height is increasing.Explained the variation of hummocky cross-stratification in sedimentary sequence of storm in JiaYuan group of Xu Zhou area,and verified the feasibility of the theory.This view is helpful to study the relationship between sedimentary sequence of storm and depth control.
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