| PDF: | |
| Time: | 2007 |
| Journal: | Journal of Jilin University (Earth Science Edition) |
| Volumn: | 37 |
| Issue: | 6 |
| Pages: | 1183-1191 |
| Type: | Other |
| Author: | Yulong Huang,Pujun Wang,Guangtian Men,Huafeng Tang |
Abstract: | The volcanic rocks of the Yingcheng Formation in the Songliao Basin were formed by multiple and intermittent eruptions. Triple division was applied in the basin volcanic rocks researches: volcanic cycle, stage and facies. A volcanic stage was defined as volcanic rock assemblages formed by a concentrated volcanic activity at certain eruption center during its regular changes on materials, components, eruption behaviors and intensity. And a volcanic cycle includes one or several stages. Geological and geophysical methods were used to divide volcanic stages, including volcanic lithology and facies analysis from logging and seismic information. Special geological interfaces were identified. The measured section of the Yingcheng Formation has been divided into five volcanic cycles and thirteen stages. |