绩溪县洪坑板岩砚石矿的岩性、成分、物理化学性能特征分析

Lithology,composition and physiochemical performance of the Hongkeng slate inkstone deposit,Jixi County

赋存于中元古代大谷运组上段地层中的绩溪县洪坑板岩类砚石,通过与歙砚石～歙县龙头石及江西龙尾石、九江石、大畈石、玉山石的物理化学参数测试资料对比分析,歙砚石其原岩均为泥砂质构造沉积岩,但岩性、成分、物理化学性能特征存在一定差异,与歙砚石—龙尾石属于不同成因机制的砚石。

The Hongkeng slate inkstone occurs in the upper member of the Mid-Proterozoic Daguyun Formation. By com- parison in physical and chemical parameters with the She inkstone,including the Longtou stone in She County,and the Longwei stone,Jiujiang stone, Dafan stone and Yushan stone in Jiangxi Province, it is different in lithological, composi- tional, physical and chemical features from the She inkstone whose parent rock is pleitic-arenaceous tectono-sedimenta- ry rock,belonging to a separate formation mechanism.