| 再论中国含煤岩系沉积学研究进展及发展趋势 |
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| 引用本文： | 邵龙义,王学天,鲁静,王东东,侯海海.再论中国含煤岩系沉积学研究进展及发展趋势[J].沉积学报,2017,35(5):1016-1031. |
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| 作者姓名： | 邵龙义 王学天 鲁静 王东东 侯海海 |
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| 作者单位： | 1.中国矿业大学(北京)地球科学与测绘工程学院, 北京 100083; |
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| 基金项目： | 国家自然科学基金项目,国家科技重大专项(2016ZX05027-001)[Foundation:National Natural Science Foundation of China |
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| 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。
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| 关 键 词： | 含煤岩系 煤炭资源 沉积学 超厚煤层的多阶段泥炭地叠加成因模式 “深时”古气候 发展战略 |
| 收稿时间： | 2017-02-13 |
A Reappraisal on Development and Prospect of Coal Sedimentology in Chi-na |
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| SHAO LongYi,WANG XueTian,LU Jing,WANG DongDong,HOU HaiHai.A Reappraisal on Development and Prospect of Coal Sedimentology in Chi-na[J].Acta Sedimentologica Sinica,2017,35(5):1016-1031. |
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| Authors: | SHAO LongYi WANG XueTian LU Jing WANG DongDong HOU HaiHai |
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| Institution: | 1.College of Geoscience and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China;2.College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China |
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| Abstract: | Over last three decades, since the theory of sequence stratigraphy was introduced into China, Chinese scholars have made a great progress in coal sedimentology. A number of coal accumulation models has been proposed based on the study of sequence stratigraphy of coal-bearing series,including the episodic coal accumulation,the coal accumulation in transgressive progress,the coal accumulation in transgressive event, and the multi-phase mire stac-king model for accumulation of super-thick coals. The synchronous sequence stratigraphic units were combined with the lithofacies paleogeography,which have promoted the reconstruction of paleogeography of different coal-accumula-ting periods. The coal-rich zones of different coal-accumulating periods were predicted based on analysis of migration of coal-accumulating centers in sequence stratigraphic framework. The study of coal facies and sedimentary organic fa-cies as an important tool in source rock assessment has been focused in the exploration of the coalbed methane and shale gas resources. The concept"coal system"has been proposed to integrate various kinds of information of coal ba-sins,including the original characteristics of peat, the stratigraphic framework of coal-bearing series, abundances of coal seams,and sulfur contents in coal in terms of depositional environments and paleoclimates,and metamorphic de-gree or ranks of coals.In recent years,coal,as an important archive of geo-information,has been used in the study of the"deep-time"paleoclimates. Inertinite macerals of coal have been used to infer the fire events of the paleo-mires in relation to the paleo-atmospheric oxygen levels. Milankovitch cycles identified in coal seams have been used to time the coal deposition and to estimate the carbon accumulation rates of paleo-mires as well as the global CO2trends. Fu-ture studies of coal sedimentology will be focused on the sequence stratigraphic pattern of different tectonic coal ba-sins,and the prediction model of high-quality coal resources and unconventional gases(coalbed methane and shale gas)in the sequence stratigraphic framework. The further efforts will also be put on the significance of coals in the study of long-term and short-term paleoclimate variation of the earth. |
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| Keywords: | coal-bearing series coal resources sedimentology multi-phase mire stacking model for accumulation of super-thick coal "deep-time"paleoclimates development strategy |
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