Full
MENG Jing,born in 1969,is mainly engaged in scientific research and management work in the development and protection of geological relics. E-mail: ljmj2024@163.com.
Outline
In order to reveal the driving mechanism of sea level changes in the North China Basin in the low latitudes of the Late Carboniferous. Taking Benxi-Taiyuan Formations in Liujiang Coalfield of North China Basin as an example,the restoration of sea level change in low latitude area and its relationship with glacier cycle in high latitude area are studied. The results show that: (1)Three sedimentary systems of coastal plain river-lake,littoral zone and shallow sea are identified in the target strata of the study area. The changes of sedimentary environment record two secondorder transgression-regression cycles(Bashkir-Middle Moscow period and Late Moscow-Early Assel period)and four third-order transgression-regression cycles(Early Bashkir period,Middle Bashkir-Early Moscow period,Late Moscow period and Late Moscow-Assel period). (2)The highlatitude glacial and interglacial periods correspond to the second-order relative high sea level and low sea level periods in the study area,respectively,indicating that the high-latitude glacial cycle is the main controlling factor of the second-order sea level change in the late Carboniferous low-latitude North China Basin. (3)The coal-organic-rich mudstone and bauxite developed during the glacial period,indicating the falling sea level and temperature during the glacial period,which is conducive to the exposure of sedimentary interfaces,swamping,and the generation and preservation of organicmatter in the epicontinental sea basin. At the same time,the decline of sea level during the glacial period also caused the prevalence of dry-wet alternate flood plain environment. In this environment,terrigenous clastic sediments are reweathered and leached,which promotes the formation of bauxite mudstone or bauxite. This study deepens our understanding of the driving mechanism of sea level change and the accumulation of sedimentary minerals such as coal and bauxite in the late Carboniferous North China Basin.
184
78
| 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 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
