Cartoon cross section of the Earth showing surface plates, upper and lower mantle, outer core, boundary layers at 670 (upper-lower mantle) and 2900 km (core-mantle) kilometers, and several postulated locations for mantle plumes. The left side shows two-layer convection while the right side portrays whole-mantle convection (courtesy Stan Hart).

The fields various oceanic basalt occupy are plotted in three-dimensional isotope space (Nd-, Sr-, and Pb-axes are shown) along with an associated mantle tetrahedron defined by the four end-members (spreading-ridge mantle = DMM, and ocean island basalt mantles EM1, EM2, and HIMU). The postulated lower mantle end-member (FOZO) is also shown (courtesy Stan Hart).

Publications:

Hauri, E.H. and S.R. Hart (1993). Re-Os isotope systematics of HIMU and EMII oceanic island basalts from the South Pacific Ocean. Earth Planet. Sci. Lett, 114, 353-371.

Hauri, E.H. and S.R. Hart (1993). Rhenium abundances and systematics on oceanic basalts. Chem. Geol., 139, 185-205.

1. Reconstructing the Os-isotope Record of Seawater
3. Partitioning of Os between Mineral Phases in Mantle-derived Rocks
4. Reconstructing the Flux of Extraterrestrial Matter to Earth through Time
5. Anthropogenic PGE Pollution of Coastal Environments
6. Continental Weathering and Runoff of Osmium