摘要
吴桂桥井田喜山期岩浆活动剧烈，多以岩床形式顺层侵入煤层顶底板及煤层中间，对煤层赋存形态、结构、煤质产生较大破坏影响，变质作用以接触变质为主，煤类复杂。接触变质带可进一步划分为岩焦混杂带、天然焦带、焦化煤带、正常煤带。
Magmatic rocks action of Himalayan period is pointed .It intrudes apical-bottom plate or midst of coal-seam by sill , affecting the coal quality .Texture and morphology of coal-seam .Because the metamorphism is contact metamorphism .The type of coal is very complicated. The contact metamorphic zone can divide into rock-coke zone , coke zone, coking coal zone and natural coal zone.
出处
《河北建筑科技学院学报》
2000年第4期70-73,共4页
Journal of Hebei Institute of Architectural Science & Technology
关键词
岩浆活动
煤层
接触变质
magmatic rocks action
coal-seam
contact metamophism
