内蒙古银额盆地额济纳旗赛汉陶来地区石炭系—二叠系煤层的发现及其意义

在对赛汉陶来地区19口石油及煤田钻井地层岩性组合特征分析的基础上，总结了中生代不同构造单元的地层分布特征、含煤层段岩性特征及煤岩物理化学特征。含煤层段岩性组合为沉火山碎屑岩或再搬运的沉火山岩、泥岩夹煤层，具有典型裂谷盆地沉积特征。该套地层横向分布稳定，不同构造单元之间可进行对比，单井平均可采煤层的厚度为4.77m。煤岩演化程度较低，为不粘煤。含煤层段沉火山角砾岩获得的锆石年龄为295.0Ma±1.3Ma~303.4Ma±2.8Ma，对应地层为上石炭统—下二叠统干泉组。银额盆地赛汉陶来地区石炭系—二叠系含煤地层的发现不仅指示了良好的煤炭资源前景，并且对石炭纪—二叠纪盆地构造演化、沉积体系，以及石炭系—二叠系沉积埋藏史等基础地质问题的研究具有重要意义。

The Carboniferous-Permian coal-bearing bed in Saihan Toroi area of Ejin Banner within Yin'e basin, Inner Mongolia, and its significances

Based on an analysis of strata from nineteen petroleum and coal wells in Saihan Toroi area, this paper sums up the distribution of Mesozoic tectonic unit, the structure and the physical and chemical characteristics of the coal-bearing beds. The strata are composed of sedimentary pyroclastic rocks and mudstone intercalated with coal beds, which implies a rift basin environment. The coal-bearing beds are widely distributed among diverse tectonic units of Yin'e basin. The average thickness of coal beds from single well is 4.77m. The coal rocks are non-caking coal with poor evolution. The LA-ICP-MS zircon U-Pb ages of sedimentary pyroclastic rocks from the coal-bearing beds are (295.0±1.3)Ma and (303.4±2.8)Ma, suggesting the Late Carboniferous-Early Permian Ganquan Formation. The Carboniferous-Permian coal-bearing beds in Saihan Toroi area of Yin'e basin show bright prospects of coal industry, and provide basic evidence of the Carboniferous-Permian basin evolution and the sedimentary system as well as the burial history of this area.