关键词: 贵德盆地, 遥感识别, 干热岩靶区, 预测模型

Abstract: Using Landsat 8 TIRS thermal infrared data, the surface temperature of Guide basin was identified by remote sensing through single window algorithm and split window algorithm, and the location of high temperature anomaly area was determined. Based on the formation conditions of dry hot rock, a multi information dry hot rock target prediction model including 12 factors, including strata, rock mass, faults, annular structure, linear structure, hydrothermal alteration anomaly, surface temperature anomaly, hot spring, geothermal drilling, regional gravity anomaly, regional aeromagnetic anomaly, and electromagnetic exploration information, was constructed, and the dry hot rock target in Guide basin was predicted. The results show that: 1) The Neogene, Triassic and Quaternary strata are the heat preservation covers of the dry hot rocks in Guide basin, the large NW trending Late Triassic intermediate acid concealed granite is the heat storage rock mass, the NNW trending Waligong Mountain deep fault and granite body are the heat conduction channels, the lower mantle asthenosphere heating and the partially molten layer heating are the main heat sources, and the rock radioactive heat generation is the superposition heat source. 2) The concealed rock mass prediction area, surface temperature anomaly area and hydrothermal alteration anomaly area in the basin all have the characteristics of distribution along the northwest southeast direction, and the distribution positions confirm each other. 3) According to the model, there is a large dry hot rock belt distributed along the northwest southeast direction in guide basin, with an area of about 820 km2. 

Key words: Guide basin, remote sensing identification, dry hot rock target area, prediction model