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January 18, 2012
Mantle Peridotite in the Samail Ophiolite, Oman
Over the past couple of weeks, I posted pictures of pillow basalts and sheeted dikes in the Samail Ophiolite, Oman. To round out the crustal ophiolite sequence, I thought I would post a couple of pictures of mantle peridotite in the Samail Ophiolite. As you can see in the below pictures, mantle peridotite in the Samail Ophiolite is generally highly-weathered and a dullish brown color. Harzburgite tends to be a …
March 8, 2011
The Mantle MOJO
Mixing of classic mantle reservoirs in tetrahedron space, Figure 2 from Hart et al. (1992). Click to view larger. If I ever name a mantle reservoir, I am going to call it the MOJO. Why? Because I would love to give a geochemistry talk where I discuss such-and-such volcanic rock having a mantle MOJO signature. The mantle MOJO will be the sexiest of mantle reservoirs. All geochemists will hope their …
