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Manganoan berthierine, Meyers Pass, New Zealand: occurrence in the prehnite-pumpellyite facies

Published online by Cambridge University Press:  05 July 2018

D. S. Coombs ,
G. Zhao  and
D. R. Peacor
D. S. Coombs*
Affiliation:
Geology Department, University of Otago, Dunedin, New Zealand
G. Zhao
Affiliation:
Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063, USA
D. R. Peacor
Affiliation:
Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063, USA
*
*E-mail: doug.coombs@stonebow.otago.ac.nz
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Abstract

Manganoan berthierine, sometimes only a few layers thick, is preserved interlayered with manganoan chlorite (chamosite) in small recrystallized patches in cherty metapelagites matamorphosed in the prehnite–pumpellyite facies at Meyers Pass, Torlesse Terrane, South Canterbury, New Zealand. The Mn occupies 11–12% of the octahedral sites, making this the most Mn–rich berthierine reported so far. The ratio (Fe+Mn)(Fe+Mn+Mg), 0.67–0.70, is at the lower end of those of previously reported occurrences, making these amongst the most Mg-rich berthierines known. Manganoan berthierine and interlayered manganoan chlorite also make up ~11–13% of the cryptocrystalline groundmass in which the berthierine is believed to have crystallized under early diagenetic conditions near a deep-ocean–sediment interface. The occurrence of berthierine in the recrystallized patches lends support to the possibility of a stability field at the temperature of prehnite-pumpellyite facies recrystallization in association with chlorite of similar but not identical composition.

Keywords

berthierinechloritelow-grade metamorphismprehnite-pumpellyite faciesMeyers PassNew ZealandTorlesse Terrane
Type
Research Article
Information
Mineralogical Magazine , Volume 64 , Issue 6 , December 2000 , pp. 1037 - 1046
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2000

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References

Ahn, J.H. and Peacor, D.R. (1985) Transmission electron microscopic study of diagenetic chlorite in Gulf Coast argillaceous sediments. Clays Clay Miner., 33, 228–36.CrossRefGoogle Scholar
Bailey, S.W. (1988) Structures and compositions of other trioctahedral 1:1 phyllosilicates. Pp. 169–88 in: Hydrous Phyllosilicates (exclusive of Micas) (Bailey, S.W., editor). Reviews in Mineralogy, 19. Mineralogical Society of America, Washington D.C. CrossRefGoogle Scholar
Brindley, G.W. (1982) Chemical composition of berthierines – a review. Clays Clay Miner., 30, 153–55.Google Scholar
Coombs, D.S., Kawachi, Y. and Ford, P.B. (1996) Porphyroblastic manganaxinite metapelagites with incipient garnet in prehnite-pumpellyite facies, near Meyers Pass, Torlesse Terrane, New Zealand. J. Met. Geol., 14, 125–42.CrossRefGoogle Scholar
Dalla Torre, M., Livi, K.J.T. and Frey, M. (1996) Chlorite textures and compositions from high-pressure/ low-temperature metashales and metagraywackes, Franciscan Complex, Diablo Range, California, USA. Eur. J. Mineral., 8, 825–46.CrossRefGoogle Scholar
Ford, P.B., Lee, D.E. and Fischer, P.J. (1999) Early Permian conodonts from the Torlesse and Caples Terranes, New Zealand. New Zealand J. Geol. Geophys. 42, 79-90.CrossRefGoogle Scholar
Hillier, S. (1994) Pore-lining chlorites in siliciclastic reservoir sandstones: electron microprobe, SEM and XRD data, and implications for their origin. Clay Miner., 29, 665–79.CrossRefGoogle Scholar
Hornibrook, E.R.C. and Longstaffe, F.J. (1996) Berthierine from the Lower Cretaceous Clearwater Formation, Alberta, Canada. Clays Clay Miner., 44, 1-21.CrossRefGoogle Scholar
James, R.S., Turnock, A.C. and Fawcett, J.J. (1976) The stability and phase relations of iron chlorite below 8.5 kb PH2O. Contrib. Mineral. Petrol., 56, 1-25.CrossRefGoogle Scholar
Jiang, W.-T., Peacor, D.R. and Slack, J.F. (1992) microstructures, mixed layering, and polymorphism of chlorite and retrograde berthierine in the Kidd Creek massive sulfide deposit, Ontario. Clays Clay Miner., 40, 501–14.CrossRefGoogle Scholar
Maynard, J.B. (1986) Geochemistry of oolitic iron ores, an electron microprobe study. Econ. Geol., 81, 1473–83.CrossRefGoogle Scholar
Merriman, R.J. and Peacor, D.R. (1999) Very low-grade metapelites: Mineralogy, microfabrics and measuring reaction progress. Pp. 10-60 in: Low-Grade Metamorphism (Frey, M. and Robinson, D., editors). Blackwell Science, Oxford.Google Scholar
Slack, J.F., Jiang, W.-T., Peacor, D.R. and Okita, P.M. (1992) Hydrothermal and metamorphic berthierine from the Kidd Creek volcanogenic massive sulfide deposit, Timmins, Ontario. Canad. Mineral., 30, 1127–42.Google Scholar
Sudo, T. (1943) On some low temperature hydrous silicates found in Japan. Bull. Chem. Soc. Japan, 18, 281-329.CrossRefGoogle Scholar
Taylor, K.G. (1990) Berthierine from the non-marine Wealden (Early Cretaceous) sediments of south-east England. Clay Miner., 25, 391–9.CrossRefGoogle Scholar
Toth, T.A. and Fritz, S.J. (1997) An Fe-berthierine from a Cretaceous laterite: Part 1. Characterization. Clays Clay Miner., 45, 564–79.CrossRefGoogle Scholar
Xu, H. and Veblen, D.R. (1996) Interstratification and other reaction microstructures in the chloriteberthierine series. Contrib. Mineral. Petrol., 124, 291-301.CrossRefGoogle Scholar