Apatite, phosphorus and titanium in eclogitic garnet from the upper mantle
Article
Haggerty, SE, Fung, AT, Burt, DM. (1994). Apatite, phosphorus and titanium in eclogitic garnet from the upper mantle
. GEOPHYSICAL RESEARCH LETTERS, 21(16), 1699-1702. 10.1029/94GL01001
Haggerty, SE, Fung, AT, Burt, DM. (1994). Apatite, phosphorus and titanium in eclogitic garnet from the upper mantle
. GEOPHYSICAL RESEARCH LETTERS, 21(16), 1699-1702. 10.1029/94GL01001
The existence of apatite exsolution lamellae in garnet supports earlier suggestions that garnet is a major repository for P in the mantle, and that P is strongly coupled to Na+Ti. The bulk P content (∼250 ppm) of mantle eclogites is unexpectedly similar to estimates for the P content (130–220 ppm) of the upper mantle; both rocks are depleted relative to chondrites and to ocean floor basalts. Eclogites have either equilibrated with the mantle at large, or have undergone secondary melting, and based on P contents are unlikely to have had subducted protoliths. Copyright 1994 by the American Geophysical Union.
