Fig. 5
From: Archaean and Proterozoic diamond growth from contrasting styles of large-scale magmatism
Chondrite normalised Nd/Er versus Yb for the harzburgitic garnets indicate two types of metasomatism. The low CaO samples with strongly sinusoidal REEN at low HREE document growth in a melt depleted reservoir that was metasomatised by a fluid. The > 2.5 wt.% CaO samples with modest HREE enrichment suggest melt dominated metasomatism36.
