摘要
系统地研究了中国西南地区晚二叠世龙潭早期ＴＯＮＳＴＥＩＮＳ的时空分布。对该地区８层ＴＯＮＳＴＥＩＮＳ的岩石学、矿物学以及地球化学特征的对比、分析，确认其全部为不同期次的同沉积碱性火山灰蚀变粘土岩。此一发现填补了全球含煤建造中缺失碱性火山灰沉积记录的空白。
The stratigraphic and geographic distribution of early tonsteins in later Permian of southwestern China has been systematically studied in this report.By means of contrast and research the eight seams' tonsteins characteristics of the petrography,mineralogy and geochemistry,it can be confirmed that all the tonsteins are the alkalinityvolcanic ash derived tonsteins from different age.This finding has filled the recording gap of alkalinityvolcanie ash sediment in the coal formation of the world.Besides,it has a important application value and theoretical significance.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
1999年第4期5-9,共5页
Coal Geology & Exploration
基金
云南省科委资助项目
关键词
碱性岩
火山灰
TONSTEIN
含煤建造
晚二叠世
alkali rocks
volcanic ash
tonsteins
coal formation
Later Permian epoch
southwestern China
