Radioactive elements exist in rock in the nature, which will release energy in the decaying process. Radioactive heat production is one of the main sources for lithospheric heat. Some basic information has been obtained about Chenzhuang uplift, Shandong Province as a hot dry rock exploration and study site. This paper calculates the radiogenic heat ratio of the rock core using Rybach heat generation rate formula, on the basis of analysis of terrestrial heat flow and geothermal field. The vertical distribution of heat generation rate at GRY1 borehole shows that the heat generation rate was larger with greater variation above 1650 m, and reached 4.72-6.78 μW/m³ at depth of 1430-1645 m, where biotite adamellite and chloritized adamellite mainly exist. At the interval of 1645-2500 m, where the rock is mainly composed of granite, biotite bearing diorite, and gabbro, the heat generation rate decreased. Overall, the heat generation rate of granite changed slightly, which was about 2.0-2.5 μW/m³, while that of biotite adamellite and slightly chloritized adamellite was higher with larger variation.

Chenzhuang uplift  /  geothermal field  /  Taishan rock group  /  radioactive heat generation