This paper focuses on the heat flow field of Ordos Basin, NW China, by combin-ing experiment method of U, K and Th, heat generation, heat conductivity, etc. In the light of the comprehensive study of the experimental ...This paper focuses on the heat flow field of Ordos Basin, NW China, by combin-ing experiment method of U, K and Th, heat generation, heat conductivity, etc. In the light of the comprehensive study of the experimental data and layer divisions of the crust, the average heat of Moho in Ordos Basin is 0. 37 HFU, much lower than that in North China Basin (0. 64-0. 97 HFU) or that in Songliao Basin (1.19 HFU) , NE China, showing the characteristics of the heat flow field of the stable cratonic basin. The average heat flow on the crust surface of the basin is about 1. 44 HFU, similar to that in Mesozoic diwa orogeny of the world, probably indicating that the diwa stage is soon expected in the basin. The interfaces from Moho to the surface in Ordos Basin have the same heat flow distribution-style with their high anomaly in theSE part, low anomaly in the NW part and NE-trending transition zone from Wuqi to Jingbian. In the transition zone, the geothermal dynamics plays the most important role for accumulation of petroleum. The top of the liquid window locates at the depth 1300m in the northwest, 1700m in the south, 1200m in the east of the basin.展开更多
基金Supported by the National Natural Sciences Foundation of China and the Chinese Academy of Science
文摘This paper focuses on the heat flow field of Ordos Basin, NW China, by combin-ing experiment method of U, K and Th, heat generation, heat conductivity, etc. In the light of the comprehensive study of the experimental data and layer divisions of the crust, the average heat of Moho in Ordos Basin is 0. 37 HFU, much lower than that in North China Basin (0. 64-0. 97 HFU) or that in Songliao Basin (1.19 HFU) , NE China, showing the characteristics of the heat flow field of the stable cratonic basin. The average heat flow on the crust surface of the basin is about 1. 44 HFU, similar to that in Mesozoic diwa orogeny of the world, probably indicating that the diwa stage is soon expected in the basin. The interfaces from Moho to the surface in Ordos Basin have the same heat flow distribution-style with their high anomaly in theSE part, low anomaly in the NW part and NE-trending transition zone from Wuqi to Jingbian. In the transition zone, the geothermal dynamics plays the most important role for accumulation of petroleum. The top of the liquid window locates at the depth 1300m in the northwest, 1700m in the south, 1200m in the east of the basin.
