延吉和龙盆地长财组沉积与聚煤特征

Deposition of Changcai Group of Helong Basin,Yanji,Jilin Province and its concentrating coal characteristics

文中分析了和龙盆地长财组的沉积与聚煤特征,即煤系地层的沉积特征以河流相为主,聚煤带位于盆地的中西部,分别呈舌状和长舌状。富煤带位于大型砂体之北侧,煤层稳定性较差,且变薄、分岔、尖灭现象普遍。

The deposition of Changcai Group of Helong Basin and its concentrating coal characteristics are analyzed in this paper. The depositional characteristics of coal-bearing formation is predominating, with the river facies, the concentrating coal region is located in the central western part of the Basin, showing the linguiform and long linguiform. The rich coal region is located in the north side of large sand body, showing poor stability, and becoming thin, splitting and die out gradually.