Al-rich warwickite from Inglefield Land, North-West Greenland
Warwickite constitutes about 5 % of an outcrop of metamorphosed ultramafic rocks of Precambrian age in North-West Greenland. It occurs as slender grains, several millimetres long, and in anhedral grains up to 5 mm in size, together with forsterite, pleonaste, phlogopite, magnetite __+ tourmaline. Po...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.612.8271 http://www.minersoc.org/pages/Archive-MM/Volume_61/61-408-693.pdf |
| Summary: | Warwickite constitutes about 5 % of an outcrop of metamorphosed ultramafic rocks of Precambrian age in North-West Greenland. It occurs as slender grains, several millimetres long, and in anhedral grains up to 5 mm in size, together with forsterite, pleonaste, phlogopite, magnetite __+ tourmaline. Post-metamorphic alteration of warwickite produced a network of boron-rich minerals and magnetite. The warwickite, containing up to 9.72 % A1203, displays asignificantly different chemical composition from warwickite lsewhere, such as that in recrystallized limestones from the type locality Warwick, New York, and in lamproitic and carbonatite-like rocks at Jumilla, Spain. K~u warwickite, oxyborate, Inglefield Land, Greenland, aluminium. |
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