Full
SHAO Longyi,born in 1964,Ph.D. supervisor,is a professor at the College of Geosciences and Surveying Engineering,China University of Mining and Technology(Beijing). He holds a Doctor of Engineering degree and has long been engaged in teaching and research on sedimentology and coalfield geology. E-mail: ShaoL@cumtb.edu.cn.
QI Zhenghui,born in 2002,Ph.D. candidate,is specializing in sedimentology and coalfield geology. E-mail: jasper1003@126.com.
Outline
Coal facies,referring to the sedimentary facies of coal,denote the original genetic type of coal,which is determined by the type of ancient peat swamp. After more than 70 years of development,coal facies research has achieved significant progress,with successive establishment of genetic parameters such as the Tissue Preservation Index(TPI),Gelification Index(GI),Groundwater Influence Index(GWI),and Vegetation Index(Ⅵ). Diessel classified coal facies types into dry forest swamp,wet forest swamp,marsh,and fen,using TPI-GI discrimination diagram. Chinese scholars have summarized the coal facies characteristics of major coal-accumulating periods in China: the Carboniferous-Permian coals in the North China coal-accumulating area are dominated by transition marsh-wet forest swamp facies;the Late Permian coals in the South China coal-accumulating area are mainly composed of transition marsh facies;the Early-Middle Jurassic coals in the Northwest China coal-accumulating area are characterized by the dominance of wet forest swamp-dry forest swamp facies;and the Early Cretaceous coals in the Northeast China coal-accumulating area are dominated by wet forest swamp facies. These characteristics reflect that significant differences exist in the types of coal-forming swamps,coal-forming plants,and paleoclimatic conditions across different coal-accumulating periods. With the discovery of unconventional resources such as deep coalbed methane and critical metals in coal-bearing series,the application of coal facies in the development of these resources has regained attention. Coal formed in different mires exhibit inherent differences in coal petrological and quality characteristics,and thus,the coal facies analysis can be applied to the evaluation of coal hydrocarbon generation potential,reservoir physical property analysis,and prediction of coal-associated resources. In recent years,with the deepening research on the sedimentary environment of coal-bearing series,mire evolution,and paleowildfire events,the rationality of using coal facies parameters such as TPI and GI as indicators for the sedimentary environment of coal-bearing series and coal has been questioned to a certain extent. The rationalization and standardized use of coal facies parameters urgently require discussion and resolution. For the sustainable development of coal facies research,future efforts should be focused on advancing the basic theories of coal facies analysis-especially the research on the genesis of macerals and modern peat mire environments and strengthening the application of coal facies analysis in practical production to better promote the utilization of mineral resources in coal-bearing series.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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