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Fig. 45 | Progress in Earth and Planetary Science

Fig. 45

From: The Atlantis Bank Gabbro Massif, Southwest Indian Ridge

Fig. 45

Crystallization models for our samples compared to the hypothetical melts in equilibrium with the augites. a Plot of Yb vs Ce (ppm). It appears that the AFC-models and in situ fractionation fit the augite melts better than a pure fractional crystallization model. Ma, mass assimilated; Mc, mass crystallized; f, fraction of melt returned from the mush-zone to the magma chamber. b Plot of Nd (ppm) vs Eu#. Eu* = (Eu* − ([Sm* + Gd*] × 0.5) − 1), where Eu*, Sm*, and Gd* represent chondrite-normalized values. Negative Eu# values represent negative Eu anomalies, indicating fractionation of plagioclase from the melt

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