Depositional Environment and Basin Evolution of the Early Cretaceous Yixian Formation in Jianchang Basin, Western Liaoning
- Received Date: 1900-01-01
- Rev Recd Date: 1900-01-01
- Publish Date: 2009-08-10
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Key words:
- ianchang Basin /
- early Cretaceous /
- Yixian Formation /
- depositional environment /
- basin evolution
Abstract: Jianchang basin is one of the typical basins in Western Liaoning and Northern Hebei region, which contains welldeveloped early Cretaceous and produced numerous fossils of Jehol biota. The early Cretaceous includes Yixan Fromation, Jiufotang Fromation and Shahai Formation. The lower and upper parts of Yixan Formaion are volcanic rocks, the middle part is sedimentary rock, which is composed of pale purple, pale yellow conglomerate, pebbled sandstone, sandstone and pale green mudstone. The depositional environment of Yixan Fromation comprises alluvial fan, braided river and lake. The paleocurrent data shows that provenace areas located in NW and SE to the basin during early stage and in NE during late stage. Alluvial fans perpendicular to the strike of the basin indicate a strong tectonism during early stage of Yixan Formation, whereas braided rivers along the strike indicate a relative stable geological setting during late stage.
| Citation: | JING Shan. Depositional Environment and Basin Evolution of the Early Cretaceous Yixian Formation in Jianchang Basin, Western Liaoning[J]. Acta Sedimentologica Sinica, 2009, 27(4): 583-591.
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