Abstract
IN 1966, Wright1 described a phonolite from the Waipiata Volcanics (Otago Province, New Zealand) which contains nodules of lherzolite. Recognizing the high pressure mineralogy and xenolithic nature of the lherzolite inclusions, Wright regarded them as evidence that the host magma was generated at sub-crustal levels. These observations were important in providing natural evidence of high pressure fractionation of magmas at depth > 20 km, and in this communication we present more data from the locality (near Trig L, Pigroot) described by Wright.
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References
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PRICE, R., GREEN, D. Lherzolite Nodules in a “Mafic Phonolite” from North-east Otago, New Zealand. Nature Physical Science 235, 133–134 (1972). https://doi.org/10.1038/physci235133a0
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DOI: https://doi.org/10.1038/physci235133a0
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