论文部分内容阅读
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，具有一定的实用价值与理论意义
The temporal and spatial distribution of TONSTEINS in the Late Permian Longtan in the southwestern China was systematically studied. Comparing and analyzing the petrology, mineralogy and geochemistry characteristics of 8 TONSTEINS in this area, it is confirmed that all of them are different sedimentary alkaline volcanic ash altered clay rocks. This finding fills the blank of the lack of record of alkaline volcanic ash deposits in the global coal-bearing construction and has certain practical value and theoretical significance