下辽河西斜坡带区煤层赋存的可能性

煤层赋存的条件取决于煤系地层沉积时的古地理景观、古气候及构造条件。根据下辽河西斜坡带区以往地质资料,本区发育一套含煤地层,由黑灰色泥岩、粉砂岩与灰白色砂岩、砂砾岩互层,含十余煤层,动植物化石丰富,属晚侏罗世—早白垩世的沙海组、阜新组。本区与赤峰—铁岭盆地群的其它煤盆地皆分布在辽宁省中西部,位于新华夏系第二巨型沉降带与阴山巨型纬向构造带复合部位,都是伴随新华夏系主干断裂而产生的断陷型盆地,无论在煤系沉积特征,还是后期所受构造改造等方面都有很多共同之处,因此认为本区可能有储量丰富的煤炭资源。

Possibility of Coal Hosting in Western Clinoform of Lower Liaohe River

Coal hosting condition lies on paleogeographic landscape, paleoclimate and structural conditions. According to existing geological data in western clinoform of the lower Liaohe River, a set of blackish gray mudstone, siltstone and grayish white sandstone, sandy conglomerate alternating beds developed in this area. This strata contain teen-numbered thin coal seams and abundant fossil animals, plants belong to Late Jurassic-Early Cretaceous Shahai Formation and Fuxin Formation. The area and other coal basins in the Chifeng-Tieling basin group are all situated in mid-western Liaoning Province, composite part of the Neocathaysian second mega zone of subsidence and Yinshan mega latitudinal structural system and are all faulted basins formed accompanying Neocathaysian major faults. The coal basins have common grounds whether in coal measures sedimentary characteristics or in succeeding structural reformation, thus abundant coal resources may be existed in the area.