Full
ZHANG Zhongmin,born in 1971,is a professor-level senior engineer, and his main research focuses on comprehensive petroleum geology research and hydrocarbon exploration. E-mail: zzm.syky@sinopec.com.
SONG Yiting,born in 2000,is currently engaged in sedimentary research. E-mail: 18740779689@163.com.
Outline
This study reconstructs the tectonic evolution and lithofacies palaeogeographic development of North Africa from the Cambrian to the Devonian through an integrated analysis of seismic,well-log,and core data. Emphasis is placed on evaluating how major tectonic events—interacting with eustatic sea-level fluctuations and climatic shifts—controlled sedimentary processes and basin architecture in the region. Results indicate that during the Cambrian-Ordovician,a depression basin dominated the western craton margin of the Tethys domain;progressive climatic cooling and continental glaciation led to the transition from braided fluvial systems to glaciogenic deposits. In the Silurian,rifting associated with the initial opening of the Paleo-Tethys Ocean triggered widespread marine transgression,resulting in the deposition of organic-rich shales in the Lower Silurian. Subsequent late Silurian regression facilitated the development of deltaic and fluvial systems. During the Devonian,the Hercynian orogeny profoundly reconfigured regional basin geometry,establishing a passive continental margin. Fluvial(braided and meandering)systems were progressively replaced by deltaic and shallow-marine environments;persistent bottom-water anoxia in the Late Devonian favored the accumulation and preservation of high-quality source rocks. Collectively,this work elucidates the synergistic controls exerted by tectonics,eustasy,and climate on the paleogeographic evolution of North Africa,identifies prospective hydrocarbon reservoir fairways,and provides a robust geological framework to guide future petroleum exploration.
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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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