山东蒙山第四纪冰川组合遗迹的发现及初步研究

发布时间：2018-05-20 01:27

本文选题：蒙山 + 冰川遗迹　；参考：《地质论评》2017年01期

【摘要】：本文介绍了山东蒙山地区南坡保存的丰富而清晰的第四纪冰川遗迹,重点展示了兰溪山谷的冰石河、侧碛堤组合,并对相伴产出的擦痕、磨光面、颤痕等冰川遗迹进行了调查与测量。同时对冰石河、侧碛堤的分布、规模、物质组成、岩石特征进行了介绍。根据侧碛堤的排列位置及砾石的风化程度,初步确定为末次冰期的冰碛遗迹;对山谷两侧磨光面上的擦痕进行了测量统计,显示谷壁磨光面上擦痕的长宽比具有10:1左右的比例规律;根据侧碛最大高度法(MELM),结合对于蒙山侧碛的调查,对蒙山雪线的高度进行了估算,初步估算蒙山南坡末次冰期时的雪线高度约为700 m左右。蒙山地区这些组合冰川遗迹的发现,为中国东部第四纪冰川的研究提供了直接的证据。
[Abstract]:In this paper, the abundant and clear Quaternary glacial remains preserved on the southern slope of the Mengshan area, Shandong Province, are introduced. The ice stone river and side moraine embankment assemblage in the Lanxi Valley are mainly displayed. Glacial traces and other glacial remains were investigated and measured. At the same time, the distribution, scale, material composition and rock characteristics of the ice-stone river and the side moraine embankment are introduced. According to the arrangement position of the side moraine embankment and the weathering degree of the gravel, it is preliminarily determined as the last glacial moraine remnant, and the scratches on the polished surface of both sides of the valley are measured and counted. It is shown that the ratio of length to width on the polished surface of the valley wall is about 10:1. According to the method of maximum height of side moraine and the investigation of Mengshan side moraine, the height of Mengshan snow line is estimated. It is preliminarily estimated that the height of the snow line in the last glacial period of the south slope of Mengshan is about 700 m. The discovery of these assemblage glacial remains provides direct evidence for the study of Quaternary glaciers in eastern China.
【作者单位】：国土资源部金矿成矿过程与资源利用重点实验室;沂蒙山国家地质公园管理处;临沂大学资源环境学院;北京大学地球与空间科学学院;山东省地质科学研究院;临沂第十一中学;山东恒瑞地矿技术服务有限公司;
【基金】：国土资源部金矿成矿过程与资源利用重点实验室开放课题(编号:201403) 恒瑞矿业资助的成果~~
【分类号】：P343.6;P534.63

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