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Metasomatic zoning in sapphirine-bearing granulites from Antarctica

Created 16/10/2025

Updated 16/10/2025

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Highly magnesian (mg about 98) granulites, containing sapphirine, enstatite, spinel, phlogopite, and cordierite, occur as xenoliths in Precambrian orthopyroxene-bearing granitic rocks at Mawson and Gage Ridge, East Antarctica. At Mawson, a marginal reaction zone is considerably enriched in Fe, K, and volatiles H2O and F, largely at the expense of Mg, with the development of sapphirine + phlogopite-rich assemblages. At gage ridge, marginal gain of Fe and to some extent Ca and Na, and loss of Mg are indicated, but there was no significant gain of K or H2O, possibly because very low P(H2O) did not allow crystallisation of phlogopite. (Auth.)

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Field Value
Title Metasomatic zoning in sapphirine-bearing granulites from Antarctica
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/196e13ea-42b8-407c-beb1-9818c6d6c524
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
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  "coordinates": [
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      ],
      [
        65.0,
        -69.0
      ],
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      ],
      [
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      ],
      [
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      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Metasomatic zoning in sapphirine-bearing granulites from Antarctica". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/metasomatic-zoning-in-sapphirine-bearing-granulites-from-antarctica