| 红沙岗勘探区煤系沉积特征 |
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| 引用本文： | 王贞.红沙岗勘探区煤系沉积特征[J].甘肃地质学报,2007,16(3):61-65. |
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| 作者姓名： | 王贞 |
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| 作者单位： | 甘肃煤炭勘查院 甘肃兰州730000 |
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| 摘 要： | 红沙岗勘探区煤系主要为中侏罗统青土井群(J2qn)和下侏罗统芨芨沟群(J1jj),可采煤层均赋存于青土井群之中。其中青土井群总体呈由下向上逐渐变细的正粒序沉积,经历了冲积扇—扇三角洲—湖泊的沉积演化。煤层厚度及层数由边缘向盆地中心方向厚度变薄、层数减少,表明煤层沉积时严格受到边缘冲积扇的控制。
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| 关 键 词： | 红沙岗 勘探区 煤系 沉积特征 |
| 文章编号： | 1004-4116（2007）03-0061-0005 |
| 收稿时间： | 2007-05-09 |
SEDIMENTARY FEATURES OF COAL SERIES IN HONGSHAGANG
EXPLORATION AREA |
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| WANG Zhen.SEDIMENTARY FEATURES OF COAL SERIES IN HONGSHAGANG
EXPLORATION AREA[J].Acta Geologica Gansu,2007,16(3):61-65. |
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| Authors: | WANG Zhen |
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| Institution: | Gansu Coal Exploration Institute, Lanzhou 730000, China |
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| Abstract: | Coal series of Hongshagang area is composed of middle Jurassic Qingtujing Group and lower Jurassic Jijigou Group.The exploitable coal seam are hosted in the Qingtujing Group,which is normal grading sediment,undergone the evolution of alluvial fan-fan delta-lake sediment.From edge to center of basin,thickness of coal seam goes thinner and numbers of seam goes less,it shows that sedimentation of coal bed is controlled strictly by edge alluvial fan. |
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| Keywords: | Hongshagang exploration area coal series sedimentary features |
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