合肥某建筑基坑中更新统粘土中构造节理的发现及特征初析

Discovery and pilot study of structure joints in the middle-pleistocene in a groundwork in the building of Hefei area

本文通过对合肥某建筑基坑揭露的中更新世晚期粘土中构造节理进行详细调查编录,分别采集各期节理充填物,进行年代测定和节理发生年代分析,并辅之节理充填物定向显微分析,结果显示中更新世晚期,该地形成多组切割关系清晰的构造节理,反映研究区段、时段曾多次发生构造事件.这一发现和认识对于丰富合肥地区中晚第四纪之交期间变形历史和研究内容,具有一定意义.

In this paper, the author made investigate in detail to structure joints developed in Later Middle-Pleistocene disclosed on a building site in the south suburb of Hefei area, fillings of the joints each time were collected separately , dated and analyzed, combined with microscopic observation to the fillings. The research result shows there were many groups tectonic joints with obvious relation cut each other during Later Middle-Pleistocene. This shows many times tectonic events had been taken placed in research area. This discovery and understand have significance to a certainty for opening out deformation history and abundance research content to Hefei area during Middle-Late Pleistocene.