摘要
本文对华北地台的山西太原西山上石炭统太原组的 7、8和 11号煤层及其顶板灰岩的地球化学特征、煤核和生物化石进行了系统分析 ,发现煤层形成过程中有海水的影响 ,煤层上覆石灰岩形成过程中亦有淡水参与 ,说明煤层及其顶板灰岩在相序上是连续的 ,其海侵模式并不是突发型海侵 ,而为渐进型海侵。
The geochemistry,coal ball and fossils of the No.7,No.8,and No.11 coal seams and their overlying limestones of the Taiyuan Formation in the western Taiyuan Mountains of Shanxi Province have been systematically analysed.The results show that the coal deposition was associated with the marine transgression and the deposition of the overlying limestone was influenced by the influx of fresh water.It is believed that there is no facies break between the coal seam and its overlying limestone and the transgression across the boundary of these two lithological units was gradual rather than abrupt.The relationships between sea level changes and coal accumulation is further discussed based on the sequence stratigraphic principle.
出处
《古地理学报》
CAS
CSCD
2001年第1期15-24,共10页
Journal of Palaeogeography：Chinese Edition
基金
国家自然科学基金资助项目 (49772 12 9)
关键词
华北地台
晚古生代
海侵模式
地球化学特征
层序地层学
North China Platform, Late Palaeozoic, transgression model, sequence stratigraphy, coal accumulation
