The Distribution And Implications Of Heat Flow From The Gregory Rift In Kenya
Journal Article: The Distribution And Implications Of Heat Flow From The Gregory Rift In Kenya
AbstractData from geothermal mapping along the Kenyan Gregory Rift zone using ground and aerial infrared techniques indicate that an average of 11-30 MW/km are advectively emitted along the rift. The bulk of the advected heat is lost through the central part of the Kenyan dome. Two other secondary geothermal sites are at the northern and southern limits of the rift adjacent to rift bifuration zones. These three geothermal sites are separated by ~ 300 km. Active thermal fields occur only as frequently as rift volcanoes. Geothermal spacing could be controlled by the length of the heat source at the lithosphere-upper mantle boundary, the thickness of the crust and the length of the rift segment between major structural breaks. At faster spreading centers the heat source is probably more continuous and following Elder's models should produce upwelling domes much more frequently than along the East African Rift. Advective cooling on one section of the East Pacific Rise at 21°N indicates that domes should appear every 40-80 km. If this is the case then approximately four times more heat is given off along a kilometer of East Pacific Rise crest as it is emitted along the Gregory Rift.
- Kathleen Crane and Suzanne O'Connell
- Published Journal
- Tectonophysics, 1983
Kathleen Crane,Suzanne O'Connell. 1983. The Distribution And Implications Of Heat Flow From The Gregory Rift In Kenya. Tectonophysics. (!) .