再论中国含煤岩系沉积学研究进展及发展趋势

发布时间：2018-06-26 10:31

本文选题：含煤岩系 + 煤炭资源　；参考：《沉积学报》2017年05期

【摘要】：过去30年间,在层序地层学及旋回地层学等沉积学理论引入中国后,中国学者在含煤岩系沉积学研究方面取得了长足的进步,相继提出幕式聚煤作用、海侵过程成煤作用、海侵事件成煤作用以及超厚煤层的多阶段泥炭地叠加成因模式等基于层序地层学理论及可容空间概念的聚煤模式,并将可进行区域对比的等时性地层单元(层序)与传统岩相古地理研究相结合,重建中国各聚煤期等时性岩相古地理,进行富煤带及聚煤中心迁移规律分析。随着煤层气及煤系页岩气等非常规天然气勘探的不断深入,煤相及沉积有机相研究作为煤及泥质岩生烃潜力评价的重要方法重新受到关注。"含煤系统"概念将含煤盆地中各种地质信息进行融合与集成,包括古泥炭堆积的原始特征、含煤岩系的地层格架及煤层丰度、煤中硫含量与分布特征、煤变质程度或煤阶等。近年来,煤层作为"深时"古气候信息的载体,成为当前研究热点之一,特别是煤中丝质体含量可用来研究古泥炭地火灾事件及大气氧含量变化,米兰科维奇旋回理论作为一种有效的"深时"时间尺度度量方法,可用来研究古泥炭地的碳聚集速率及其所反映的净初级生产力与大气CO2变化趋势。未来含煤岩系沉积学将会进一步加强研究不同构造背景下的含煤岩系层序地层格架样式、层序地层格架下的优质煤炭资源与煤系非常规天然气资源预测模式,以及煤层在地球长、短周期气候变化旋回中的地质意义。
[Abstract]:In the past 30 years, after the introduction of sedimentary theories such as sequence stratigraphy and cyclic stratigraphy into China, Chinese scholars have made great progress in the study of sedimentology of coal-bearing rock series. The coal accumulation model based on sequence stratigraphy and the concept of tolerance space, such as the coal-forming process of transgression events and the multi-stage peat ground superposition genetic model of super-thick coal seam. The isochronous stratigraphic unit (sequence), which can be used for regional correlation, is combined with the traditional lithofacies paleogeography to reconstruct isochronous lithofacies paleogeography of China in each coal accumulation period, and to analyze the migration law of coal-rich zone and coal accumulation center. With the development of unconventional natural gas exploration, such as coalbed methane and coal-measure shale gas, the study of coal facies and sedimentary organic facies as an important method for evaluating hydrocarbon generation potential of coal and argillaceous rocks has received renewed attention. " The concept of coal-bearing system merges and integrates various geological information in coal-bearing basins, including the primitive characteristics of paleo-peat accumulation, the stratigraphic framework of coal-bearing rock series and the abundance of coal seam, the content and distribution of sulfur in coal, the metamorphic degree of coal or the rank of coal, etc. In recent years, coal seam, as the carrier of "deep time" paleoclimate information, has become one of the current research hotspots, especially the content of filamentous body in coal can be used to study the fire event in ancient peat land and the change of atmospheric oxygen content. As an effective time scale measure method, Milankovich's cycle theory can be used to study the rate of carbon accumulation in ancient peat land and the trend of net primary productivity (NPP) and atmospheric carbon dioxide (CO _ 2) variation in ancient peat land. In the future, sedimentology of coal-bearing rock series will further strengthen the study of sequence stratigraphic framework patterns of coal-bearing rock series under different tectonic backgrounds, high-quality coal resources under sequence stratigraphic framework and prediction models of unconventional natural gas resources in coal-bearing strata. And the geological significance of coal seam in the long and short period climate change cycle of the earth.
【作者单位】：中国矿业大学(北京)地球科学与测绘工程学院;山东科技大学地球科学与工程学院;
【基金】：国家自然科学基金项目(41572090,41402086) 国家科技重大专项(2016ZX05027-001)~~
【分类号】：P618.11

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