Petroleum Exploration and Development

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Scope, nature, and exploration significance of Ordos Basin during geological historical periods, NW China

HE Dengfa, CHENG Xiang, ZHANG Guowei, ZHAO Wenzhi, ZHAO Zhe, LIU Xinshe, BAO Hongping, FAN Liyong, ZOU Song, KAI Baize, MAO Danfeng, XU Yanhua, CHENG Changyu

Petroleum Exploration and Development, 2025, 52(4): 855-871. DOI: 10.1016/S1876-3804(25)60608-2

Fig. 1. Outline of block tectonics of the North China Craton, the geotectonic position of the Ordos Basin and the distribution of oil and gas fields.

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Fig. 2. S-wave velocity (V_s) structure profile of the lithosphere across the Ordos Block and surrounding orogenic belts (see Fig. 1 for the profile location).
Fig. 3. Schematic diagram of the late Changcheng System structural-sedimentary environment and prototype basin in the North China Craton (a cratonic epimarine basin of 160× 10⁴ km² and wide rift system caused by regional extension).
Fig. 4. Lithofacies paleogeographic map of the North China Craton during the depositional period of bottom coal formation at the bottom of the Permian Taiyuan Formation (corresponding to the Bashkirian-Gesherian) (modified from Reference [57]).
Fig. 5. Distribution of the Ordos prototype basin and adjacent region during the depositional period of the Yanchang Formation in the Middle-Late Triassic.
Fig. 6. Schematic diagram of tectonically reworked "residual Ordos Basin".
Fig. 7. Tectonic evolution on profile G2022-07 in the Ordos Basin (see the profile location shown in Fig. 1).

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