Multidisciplinary Constraints on the Thermal‐Chemical Boundary Between Earth's Core and Mantle

Heat flux from the core to mantle provides driving energy for convection thus powering plate tectonics, and contributes a significant fraction of geothermal heat budget. Indirect estimates core-mantle boundary flow are typically based on petrological evidence temperature, interpretations temperatures indicated by seismic travel times, experimental measurements mineral melting points, physical models, or models. However, previous have not consistently integrated these lines evidence. In this work, an interdisciplinary analysis is applied co-constrain test thermal layer (TBL) theory. The concurrence TBL balance support geomagnetism, seismology, review petrologic historic supports QCMB ∼15 TW, with all except geomagnetism supporting as high ∼20 TW. These values provide tighter constraint relative work. Our work describes properties consistent TBL, long-lived basal molten through much Earth's history.