Full
ZHANG Haijun,born in 1981,Ph.D.,is a professorial senior engineer. He is mainly engaged in researches on sedimentology and mineral deposit. E-mail: zhanghaijun@mail.cgs.gov.cn.
Outline
The Devonian strata in the northern Guangdong Province are widely distributed and well-developed,with abundant fossil data. Through comprehensive stratigraphic comparisons and analyses of lithostratigraphy,biostratigraphy,sequence stratigraphy and event stratigraphy in the research area,and based on a measured section in the Nangang Village,Liannan County(four sedimentary facies,three biological zones and eight stratigraphic sequences),three distinct evolutionary stages of Devonian sedimentary paleogeography are recovered(Middle Devonian Givetian,Late Devonian Frasnian and Famennian). Under the opening and expansion of the Qinfang Trough,the northern Guangdong Province was gradually transgressed,forming a platform basin intertwined with a trough basin. It reached the largest ocean basin in the late Frasnian stage,and began to gradually recede during the Famennian stage. The paleogeographic feature affected the paleontological distribution and spatiotemporal migration,such that the transition from the coral-stromatoporoid reef community(Givetian),stromatoporoid reef community(Frasnian)and fungal-algae reef community(Famennian)was clear in the Nangang Village,Liannan County. According to Devonian regional paleogeographical characteristics,reef communities,tectonic and climatic background,the tectonic event was the dominant factor for the biological and geological environment,especially during the Late Devonian F-F event.
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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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