Regional heat-flow variations across the sedimented Juan de Fuca Ridge eastern flank: constraints on lithospheric cooling and lateral hydrothermal heat transport

Seafloor heat flow has been estimated continuously along a transect on the sedimented eastern flank of the Juan de Fuca Ridge to provide constraints on the scale and rate of lateral heat and fluid transport in the upper igneous crust, and on the total flux from the young lithosphere beneath. The profile extends from 20 km east of the ridge axis, where turbidite sediments lap onto the oceanic crust at an age of less than 1 Ma, and ends 110 km east of the axis over 3.6 Ma crust.