抚顺盆地超厚煤层的沉积条件分析

基金项目:

国家自然科学基金项目（49572128）的成果之一

详细信息

ANALYSIS ON THE SEDIMENTARY CONDITIONS OF EXTRA-THICK COAL SEAM FROM FUSHUN COAL FIELD

1. China University of Geosciences;
2. No. 185 Team of Coal Geology Bureau of Shaanxi Province;
3. No. 2 Regional Survey Team of Geology and Mineral Resources Bureau of Heilongjiang Province

摘要: 根据抚顺盆地早第三纪超厚煤层中异常丰富的成因标志,论证了一种与河流、风暴作用有关的陆相超厚煤层形成新机制——湖成异地—微异地混合堆积机制。在这一新机制中,由风暴上升流(也许还有地震)触发的水下重力流及风暴回流,既驱动湖滨泥炭沼泽和三角洲上的有机碎屑及无机碎屑进入湖泊中心区,又造成泥炭碎屑在较深水环境的再次堆积,从而使其中无机碎屑与泥炭碎屑有效地分离。
- 厚煤层 /
- 成因 /
- 沉积条件 /
- 早第三纪 /
- 抚顺盆地
Abstract: According to the extremely abundant genetic indicators of the Palaeogene extra-thick coal seam in the Fushun coal field,a new formation mechanism for the continental extra thick coal seam,i. e.,lacustrine allochthonous-microallochthonous mixed peat accumulation mechanism,which is related to the river and strom events,are demonstrated In this new mechanism,the storm current or subaquatic gravity current induced by storm not only transported the organic and inorganic clasts formed in lakeshore swamp and delta into the central lake,but also redeposited the peat clasts in deeper water environment,separating effectively the inorganic clasts from the peat clasts.
- thick coal seam /
- genesis /
- sedimentary conditions /
- palaeogene /
- Fushun coalfield