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<H1>Oldoinyo Lengai, East African Rift</H1>

<H2>World's only active carbonatite volcano</H2>

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<P>I had the opportunity to join a French expedition organized
by scientists from Le Centre National de la Recherche Scientifique (CNRS) to sample volatiles discharging from Oldoinyo Lengai, Tanzania.  We had spent three days in the crater and then the volcano started erupting.  This allowed us to not only sample pristine mantle volatiles but also fresh carbonatite lavas.</P>

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<BR>Oldoinyo Lengai lava flow, about two days old.

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<BR>Sampling of active flow (B. Marty and T. Fischer)
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<H3>Publications from this work:</H3>

<P CLASS="reference"><B>Fischer, T.P.</B>, Burnard, P., Marty, B., Hilton, D.R., Furi, E., Palhol, F., Sharp, Z.D., and Mangasini, F. (2009) Upper-mantle volatile chemistry at Oldoinyo Lengai volcano and the origin of carbonatites, Nature, 459, 77-80 doi:10.1038/nature07977

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