长白山天池火山是中国东北地区规模最大、最具喷发风险的火山，是板内火山的典例，为认识板内火山特征、成因机制、火山喷发风险等提供了绝佳的场所。地热探测工作的缺失很大程度上制约了对长白山天池火山深部岩浆系统的认识。本项目拟通过直接的钻井稳态温度测量和热物性参数测试，获取高质量热流数据，揭示长白山天池火山区大地热流分布及热异常特征。结合地球物理探测数据构建三维地质模型，以实测大地热流和热物性参数为约束，开展三维瞬态热模拟，揭示天池火山区岩石圈热结构（地壳放射性生热、地幔热与岩浆热对地表大地热流的贡献及岩石圈温度分布），进而阐明地热数据约束下的岩浆房特征（补给形式、形态、埋深、温度等）。大地热流和岩石圈热结构的研究将为长白山天池火山岩浆系统特征及火山成因机制研究提供新的必要资料，是长白山天池火山综合探测的重要补充。

Changbaishan Tianchi volcano is the largest-scale and highest-risk volcano in Northeastern China. It is also a classic example of the intra-plate volcano, providing excellent materials for understanding the characteristics, geodynamic mechanism, and eruption risk of the intra-plate volcano. Lack of geothermal data has largely restricted the understanding of deep magma systems. This project intends to obtain high-quality terrestrial heat flow data, based on direct steady borehole temperature logging and thermo-physical parameter measurement, to reveal the surface heat flow distribution and anomalous characteristics of the Changbaishan Tianchi volcanic area. Combined with geophysical exploration data to construct a three-dimensional geological model, and constrained on the measured heat flow and thermo-physical parameters, we carry out a three-dimensional transient thermal simulation to reveal the lithosphere thermal structure beneath the Tianchi volcanic area, including the contribution of radioactive heat generation of the crust and mantle heat flow and magmatic heat to surface heat flow, as well as lithospheric temperature distribution), and then clarify the characteristics of the magma chamber (injection form, shape, burial depth, temperature, etc.) with the geothermal data constrained. The study of terrestrial heat flow and lithospheric thermal structure will provide necessary new data for the study of the characteristics of the magmatic system and the geodynamic mechanism of Changbaishan Tianchi volcano and will be an important supplement to the comprehensive exploration of the Changbaishan Tianchi volcano.