The Songliao Basin is a large terrestrial sedimentary basin surrounded by the Greater Khingan, Lesser Khingan and Changbai mountains in Northeast China. It spans 260,000km2 across the provinces of Heilongjiang, Jilin, and Liaoning, and is crossed by the Songhuajiang and Liaohe rivers.
The Songliao Basin is situated in a humid and semi-humid region in the frigid-temperate and temperate zones of China. A cold and humid forest, meadows, and grassland comprise its landscape. It is a sedimentary basin in terms of geology, having lowland landform characterized by high surroundings and a low center. The basin is surrounded by mountains and hills, with the Zhangguangcai Mountains to the east, the Greater Khingan Range to the west, the Kangping-Faku hill zone to the south, and the Lesser Khingan Range to the north. Within the basin are the vast plain and swamps of the Nenjiang- Songhuajiang river system and the Liaohe river system.
The Songliao basin originated between the late phase of Indosinian movement and the early stage of Yanshan movement. Its development stage was between mid-late Yanshan movement and early Himalayan movement. The basin is mainly surrounded by outcrops of metamorphic rocks and volcanic rocks of the Paleozoic and Prepaleozoic eras. Within its border, Cretaceous strata are widely distributed under the Cenozoic strata. A tremendous black treasury is buried here - the Daqing and Jilin oilfields.
The information is provided by presentation of "Songliao Basin" from China National Petroleum Corporation.
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