Abstract:

Neopaleozoic of Ordos basin attracts more and more attention because of its blanket enriching sandstone and reservoir. We had studied the relationship between the sedimentary filling, sandstone component, volcanic sediment and orogenic belt, suggest that north Ordos basin and Hing Gan Mts.-Mongolia orogenic belt formed a indiscerptible orogen-basin system in Late Paleozoic.The sedimentary systems and sequence patterns of the six super sequence reveal the basin evolution from epeiric sea to intracontinental depression basin. Dickinson triplot of sandstone clastic component indicate the sediment come from north recycled-orogenic belt. volcanic sediment matter recorded the circulation and adjusting of  crust-mantle matter. We suggest that small-scale river-dalta systems of Late Carboniferous-Earliest Permian owing to the terrain assembly，intermittence rifting and low-amplitude uplift, while big-scale river-dalta systems of Permian couple with collision strengthen and cyclicity uplift of the orogenic belt. The long-term complicated  collision process reflected the characteristic of Chinese orogen-basin system，such as microcontinental amalgamation，soft collision，multi-cycle suturing and intensive intracontinental tectonic activities, it is significant for gentle slope forming and sand reservoir widely distribution in Upper Paleozoic ordos intercratonic depression basin.

Key words: sedimentary filling, orogen-basin coupling, Late Paleozoic, north Ordos basin, Hing Gan Mts.-Mongolia orogenic belt, petroleum