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Rodgers, K. A., Brothers, R. N. (1969) Olivine, pyroxene, feldspar, and spinel in ultramafic nodules from Auckland, New Zealand. Mineralogical Magazine, 37 (287) 375-390 doi:10.1180/minmag.1969.037.287.11

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Reference TypeJournal (article/letter/editorial)
TitleOlivine, pyroxene, feldspar, and spinel in ultramafic nodules from Auckland, New Zealand
JournalMineralogical Magazine
AuthorsRodgers, K. A.Author
Brothers, R. N.Author
Year1969 (September)Volume37
Issue287
PublisherMineralogical Society
Download URLhttps://rruff.info/doclib/MinMag/Volume_37/37-287-375.pdf+
DOIdoi:10.1180/minmag.1969.037.287.11Search in ResearchGate
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Mindat Ref. ID6300Long-form Identifiermindat:1:5:6300:9
GUID0
Full ReferenceRodgers, K. A., Brothers, R. N. (1969) Olivine, pyroxene, feldspar, and spinel in ultramafic nodules from Auckland, New Zealand. Mineralogical Magazine, 37 (287) 375-390 doi:10.1180/minmag.1969.037.287.11
Plain TextRodgers, K. A., Brothers, R. N. (1969) Olivine, pyroxene, feldspar, and spinel in ultramafic nodules from Auckland, New Zealand. Mineralogical Magazine, 37 (287) 375-390 doi:10.1180/minmag.1969.037.287.11
In(1969, September) Mineralogical Magazine Vol. 37 (287) Mineralogical Society
Abstract/NotesSummaryChemical, optical, and X-ray data are presented for forsteritic olivine, bronzite-enstatite, diopsidic augite, anorthite, and spinel from ultramafic nodules at seven localities in Auckland province. Olivine has a composition range from Fo79–93 for large primary crystals to Fo80–100 for smaller interstitial grains. Orthopyroxenes (En83–96) carry exsolution lamellae of clinopyroxene parallel to (100); clinopyroxenes are mainly diopsidic augites with exsolved bronzite. The plagioclase (An97) has high-temperature characteristics and a lattice structure probably transitional between primitive and body-centred anorthite. Spinels include chromite, picotite, ceylonite, hercynite, and magnetite. Element distribution indicates that the ultramafic assemblages attained equilibrium at temperatures near 1250 °C and at moderate pressures, corresponding to the melting interval of anhydrous basaltic magmas within the uppermost mantle.

Map of Localities

Mineral Occurrences

LocalityMineral(s)
Todd's Quarry, Arapohue, Kaipara District, Northland Region, New Zealandⓘ Lherzolite

See Also

These are possibly similar items as determined by title/reference text matching only.

Brothers, R. N., Rodgers, K. A. (1969) Petrofabric Studies of Ultramafic Nodules from Auckland, New Zealand. The Journal of Geology, 77 (4) 452-465 doi:10.1086/628370
Rodgers, K. A., Brothers, R. N., Searle, E. J. (1975) Ultramafic nodules and their host rocks from Auckland, New Zealand. Geological Magazine, 112 (2) 163-174 doi:10.1017/s0016756800045842
Wright, J. B. (1969) Olivine nodules and related inclusions in trachyte from the Jos Plateau, Nigeria. Mineralogical Magazine, 37 (287) 370-374 doi:10.1180/minmag.1969.037.287.10
Rodgers, K. A., Chisholm, J. E., Davis, R. J., Nelson, C. S. (1977) Motukoreaite, a new hydrated carbonate, sulphate, and hydroxide of Mg and Al from Auckland, New Zealand. Mineralogical Magazine, 41 (319) 389-390 doi:10.1180/s0026461x00038147
O'Brien, J. P., Rodgers, K. A. (1973) Xonotlite and rodingites from Wairere, New Zealand. Mineralogical Magazine, 39 (302) 233-240 doi:10.1180/minmag.1973.039.302.11
Steiner, A. (1970) Genesis of hydrothermal K-feldspar (adularia) in an active geothermal environment at Wairakei, New Zealand. Mineralogical Magazine, 37 (292) 916-922 doi:10.1180/minmag.1970.037.292.07
Black, Philippa M. (1969) Rankinite and kilehoanite from Tokatoka, New Zealand. Mineralogical Magazine, 37 (288) 517-519 doi:10.1180/minmag.1969.037.288.13
Rodgers, K. A. (1974) Serpentine minerals from the southern portion of the ultramafic belt of New Caledonia. Mineralogical Magazine, 39 (307) 798-801 doi:10.1180/minmag.1974.039.307.07
Black, Philippa M. (1969) Harmotome from the Tokatoka district, New Zealand. Mineralogical Magazine, 37 (288) 453-458 doi:10.1180/minmag.1969.037.288.04
Rodgers, K. A., Bevan, J. C. (1974) Hornblendites from the southern portion of the New Caledonian ultramafic belt. Mineralogical Magazine, 39 (308) 890-893 doi:10.1180/minmag.1974.039.308.09
Mackenzie, K. M., Rodgers, K. A., Browne, P. R. L. (1995) Tamarugite, NaAl(SO4)2·6H2O, from Te Kopia, New Zealand. Mineralogical Magazine, 59 (397) 754-757 doi:10.1180/minmag.1995.059.397.17
 
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