Staurolite from the Haast Schist in South Westland
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چکیده
منابع مشابه
Garnet-Biotite Chemistry for Thermometry of Staurolite Schist from South of Mashhad, NE Iran
Mashhad Metamorphic Complex (MMC) with metamorphic, granitic intrusions and ophiolite units is situated in the suture zone of Paleotethys in NE Iran. Triassic staurolite-garnet schist of Khalaj represents the highest grade of metamorphism in MMC. In this study EPMA analyses of garnet and biotite used to determine the maximum temperature for regional metamorphism. The pattern of zoning in garnet...
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A survey of matai (Podocarpus spicatus) / totara (Podocarpus totara var. waihoensis) forest in South Westland recorded that c. 600 ha of these forests remain from a possible former 43,000 ha. Basal discs cut from logged or windthrown matai and totara showed a strong linear relationship between diameter and age (annual growth rings). Detailed surveys of stands showed grouping of size class distr...
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Dacrycarpus dacrydioides forests in South Westland between the Waitangitaona and Saltwater rivers occur on low terraces of alluvial silt. Their relationship to other river flat and swamp communities on post-glacial surfaces is described. Recently abandoned river beds are colonised by pioneer species, which give way to vegetation dominated by grasses, sedges and rushes, whi(:h in turn afe invade...
متن کاملThe staurolite enigma solved.
Staurolite has been long considered an enigma because of its remarkable pseudosymmetry and the frequent twinning. Staurolite gives two twins whose occurrence frequency seems to contradict the condition of lattice restoration requested by the reticular theory of twinning, in that the more frequent one (Saint Andrews cross twin) has a twin index of 12, whereas the less frequent one (Greek cross t...
متن کاملNative nickel from the Jerry River, South Westland, New Zealand: an example of natural refining
Native nickel of composition Ni 96"3 ~, Fe 1"77 ~, and Co 0'69 ~ was found as tiny flakes up to o'75 mm across in a heavy mineral concentrate from stream sediments in the Jerry River, South Westland, New Zealand. The locality is approximately I3 km downstream from the original locality for awaruite (Ni~Fe), and it is shown that the nickel content of detrital grains increases with distance from ...
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ژورنال
عنوان ژورنال: New Zealand Journal of Geology and Geophysics
سال: 1975
ISSN: 0028-8306,1175-8791
DOI: 10.1080/00288306.1975.10418204