Abstract
Gabbroic dykelets cutting peridotitic tectonites are generally interpreted as the product of in situ partial melting, or as the path of upward moving magma. However, we report here that their structure strongly suggests emplacement by hydraulic fracturing, and their bulk and mineral chemistry indicate that they were highly differentiated liquids issued from the overlying magma chamber. They cannot be the feeding channels of the magma chamber, which contains the primitive liquids produced by partial melting of the upper mantle.
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Reuber, I., Whitechurch, H. & Caron, J. Setting of gabbroic dykelets in an ophiolitic complex by hydraulic fracturing. Nature 296, 141–143 (1982). https://doi.org/10.1038/296141a0
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DOI: https://doi.org/10.1038/296141a0
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