地质历史中有聚煤作用发生并形成有工业价值的煤矿床的时期,又称成煤时代或成煤期。聚煤期和主要聚煤期是就全球而论的。就全球范围而言,有3个主要聚煤期。
以大量钻孔资料为基础,研究了伊宁盆地中侏罗统含煤地层的分布特征、含煤性、聚煤期。
On the basis of mass borehole data, the paper analyzed Middle Jurassic coal-bearing strata distributing features, coal-bearing property, coal-forming period in the Yining basin.
北西西系是成盆期的构造和同沉积构造,对盆地聚煤起最主要的控制作用;
The NNW structural system is considered to be synbasinal and syndepositional structures, which appear exert the most important controlling effects on coal accumulation in the basin.
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