Fig. 1: Pressure-temperature covariation diagram showing the relationship between lithospheric-mantle conductive geotherms, lithospheric thickness and diamond window.
From: Diamond preservation in the lithospheric mantle recorded by olivine in kimberlites
The diamond window is here defined as the depth interval bracketed by the intersection of conductive geotherm and graphite-diamond transition (“diamond in”), and the intersection of conductive geotherm and mantle adiabat (here assumed to be 1300 °C). A cold lithospheric-mantle geotherm (e.g., 36 mW/m2) corresponds to a deeper lithosphere-asthenosphere boundary (LAB) and thicker diamond window. The diamond window is absent for much hotter conductive geotherms (e.g., 44 mW/m2), which do not intersect the diamond stability field. Conductive geotherms from Hasterock and Chapman57.
