The mantle radiogenic heat power from U and Th as a function of the measured geoneutrino signal; the solid lines represent the sunken-layer model, while the dotted lines the homogeneous mantle (see Section 4). The green and the blue lines indicate the individual Th and U contributions, respectively, while the brown lines show the total signal. The measured mantle geoneutrino signal from a combined Borexino + KamLAND analysis is shown by the vertical solid orange line; the corresponding 1 band is shown by a filled triangular area. The arrows on the vertical -axis indicate the radiogenic heat corresponding to the best fit geoneutrino signal. Details in text.
