聚煤期

第三纪是东北地区重要的一个聚煤期，煤种主要以褐煤为主；

The tertiary period is an important coal-accumulating period of Northeast China , Lignite is main coal species .

侏罗纪是中国西北地区最主要的聚煤期。

Jurassic is the main coal forming period in Northwest China .

盆地中三个聚煤期与规模较大的WNWNW向断层有关。而盆内中央断隆带内部的WNWNW向背斜构造则控制着各时期的聚煤中心。

Relatively large WNW-NW-trending faults seem controll the occurrence of three coal-accumulating stages , while WNW-NW-trending anticlines inside the central fault may controll the coal-accumulating centres and districts .

泥盆纪是中国聚煤期之一。

Devonian is one of several coal-forming periods in China .

吐哈盆地早、中侏罗世聚煤期古构造

Palaeotectonics in the early and Middle Jurassic coal-forming periods of the Turpan-Hami Basin

晋城矿区东部9~煤聚煤期沉积环境演化

No. 9 Coal Seam Depositional Environment Evolution during the Coal-accumulating Stage in Eastern Jincheng Mining Area

含煤地层主要为舒兰组，具有湖前和湖后两个聚煤期。

The main coal-bearing strata is Shulan form , the coal-accumulation period including pre-lake facies and paul-lake facies .

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 .

三9煤形成于三角洲平原过渡带，发育在由分流间湾充填而成的泥炭沼泽环境中，其厚度变化、展布方向等主要受聚煤期沉积环境的影响。

Coal seam No. 9 was accumulated in marsh developed on the filled interdistributary bay of the deltaic plain transition belt . Variations in thickness and direction of extension of coal seam were main influenced by sedimentary environments during coal accumulation .

本文通过初步总结新中国成立以来我国煤田地质勘探和煤田地质研究方面的一些主要成果，简要地叙述了中国煤炭资源的形成和分布规律及七个主要聚煤期的煤炭资源远景。

This paper sums up preliminarily research achievements in the field of geological prospecting and coalfield geology . It describes briefly the regularities of coal resources formation and distribution in China and prospect of coal resources in seven major coal accumulation periods .

中国无烟煤分布区的特点是聚煤期后的地质时代构造活动强烈，使煤层原始结构遭受严重破坏，因此含气量虽高，但渗透率低、可解吸气量低。

The characteristic of anthracite area in China is that the strong tectonic movement after geologic period destroyed seriously the coal bed primary structure , so the permeability and gas adsorbance solvability are low , in spite of the gas content is high .