摘要
保靖县卡棚沉积型黑滑石矿床,是一种新类型的滑石矿床。钙质黑滑石矿层赋存于二叠系下统栖霞组上段,呈多层韵律出现,含矿4层,厚5.3～26.3m,含滑石14.1～44.07％,属原生贫矿。产于风化带中的黑滑石粘土,是原生矿层风化淋滤后的产物,属风化带富矿。矿石物质组分简单,主要为黑滑石、方解石、石英、蒙脱石等。矿床风化分带清楚。黑滑石被认为是同生沉积后期,海解作用产物,在风化阶段又进一步相对富集。
The sedimentary type black talc deposit in Kapeng, Baojing county is a new type of talc deposit. The calcareous black talc beds occur in the upper member of Lower Permian Qixia Formation, shwing polylaminated rhyme, containing 4 layers of talo ore, with thickness ranging from 5.3 m to 26.3 m talc content 14.1%～44.07%, belonging to primary poor ore. The black talc clay in the weathering zone is the weathering and leaching products of primary talc beds belonging to weathered zone rich ore. The ore is simple in mineral composition, the main minerals including black talc, calcite, quartz, montmorillonite etc. The deposiit is of clear weathering zoning. The black talc is considered to be product of halmyrolsis in the late stage of synsedimentary process, and decoming relatively enriched in the weathering stage.
出处
《湖南地质》
1992年第1期37-41,共5页
Hunan Geology
关键词
滑石
矿床
地质特征
保靖县
Qixia Formation
Black talc deposit
Geologic feature
weathering and leaching
