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Microtomography of Partially Molten Rocks: Three-Dimensional Melt Distribution in Mantle Peridotite

Science  01 Apr 2011:
Vol. 332, Issue 6025, pp. 88-91
DOI: 10.1126/science.1202221

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  1. Fig. 1

    Three-dimensional melt distribution of olivine-basalt aggregates. The size of each cube is 140 μm by 140 μm by 140 μm. The melt volume fractions are (A) 0.02, (B) 0.05, (C) 0.10, and (D) 0.20. Gray represents the interfaces between melt and olivine crystals; red represents the interior of melt channels. The hollow space is where olivine crystals reside. Interconnected melt channels along grain edges are observed in all four samples.

  2. Fig. 2

    Interconnectivity of melt channels in olivine-basalt aggregates with melt fractions of (A) 0.02, (B) 0.05, (C) 0.10, and (D) 0.20. The thickness of the channels is scaled to the actual size of the melt channel width. The multifurcation of channels along grain boundaries is an indication that the AVIZO skeletonization program (21) breaks down at grain boundary residing melt.

  3. Fig. 3

    Histogram of connectivity for samples with melt fraction of (A) 0.02 (m = 731), (B) 0.05 (m = 2622), (C) 0.10 (m = 1211), and (D) 0.20 (m = 875), where m is the number of nodes present in the simplified skeleton. The insets display a representative volume of the idealized network (bounding box is 100 μm by 100 μm by 100 μm) with melt channels shown as gray tubes and nodes as spheres color-coded for connectivity: 1, black; 3, red; 4, green; 5, blue; 6, magenta; 7 and above, yellow.