济南张夏黄土堆积及其成因分析

鲁中南山地西北边缘的山麓地带、大沙河沿岸阶地广泛分布厚度不一的黄土堆积。其中出露在河岸阶地的济南市长清区张夏镇的黄土物质来源复杂，既有西北气流，东部渤海湾气流搬运而来的物质，又有当地生成的坡洪积碎屑物质。张夏黄土下部呈现明显的水流侵蚀痕迹，中间夹有围岩碎屑，应属于风成-洪积、坡积成因的黄土状土。

Sedimentary characteristics and genetic analysis of Zhangxia Loess in Jinan,Shandong Province

Loess layers with varying thicknesses are widely distributed on the terraces of the Dashahe River and the piedmonts along northwestern margin of mountainous areas of central southern Shandong Province.The material sources of the Zhangxia Loess which is exposed on the terraces in Zhangxia of Changqing region of Jinan are complicated,including materials transported by northwestern current and eastern Bohai Bay current and the local pluvial sediments. Based on the characters of water erosion and rock clasts,the Zhangxia Loess is possibly a product of aeolian-talus-pluvial process.