Wave Structre in Paleozoic Era of Ordos Basin and Its Significance in Paleogeography

FANG Guo qing; LIU De liang; FENG Jiang

Undulation is one of the fundamental models of the geological effect,the undulation motion and variation in shape of earth crust is an geologic facts. In this paper,the undulation theory is applied to discuss the structure,deposit and paleogeography pattern of Paleozoic of Ordos Basin.The units of wave structure of Ordos and its neigbhouring areas are divided as:Yinshan wave trough,Yimeng wave crest,Central wave trough,Weibei wave crest,Qingling wave crest,Alashan wave crest,Helan wave trough,Central doming wave crest,Eastern wave trough and Kelan wave crest structure belt.The compound of Central wave trough and Eastern wave trough formed eastern salt depression.This area has also formed the big center of hydrocabon source that are the most important in under Paleozoic group of Ordos Basin.Central doming wave crest structure belt and Central wave trough structure belt were formed Dinbian compound areas,which make the central doming appear saddle in Dinbian.It also reasonably explains the phenomenon that Central doming is suspended in Dinbian area.

1 Department of Earth & Space Siences,China Science and Technology University, Hefei 230026;

2 Lanzhou Institute of Geology,Chinese Academy of Sciences,Lanzhou 730000

Received Date: 1999-03-30

Rev Recd Date: 1999-05-03

Publish Date: 2000-09-10

Key words:

Abstract: Undulation is one of the fundamental models of the geological effect,the undulation motion and variation in shape of earth crust is an geologic facts. In this paper,the undulation theory is applied to discuss the structure,deposit and paleogeography pattern of Paleozoic of Ordos Basin.The units of wave structure of Ordos and its neigbhouring areas are divided as:Yinshan wave trough,Yimeng wave crest,Central wave trough,Weibei wave crest,Qingling wave crest,Alashan wave crest,Helan wave trough,Central doming wave crest,Eastern wave trough and Kelan wave crest structure belt.The compound of Central wave trough and Eastern wave trough formed eastern salt depression.This area has also formed the big center of hydrocabon source that are the most important in under Paleozoic group of Ordos Basin.Central doming wave crest structure belt and Central wave trough structure belt were formed Dinbian compound areas,which make the central doming appear saddle in Dinbian.It also reasonably explains the phenomenon that Central doming is suspended in Dinbian area.

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Wave Structre in Paleozoic Era of Ordos Basin and Its Significance in Paleogeography

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