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Authigenic Chrysotile Formation in the Matrix of Quaternary Debris Flows, Northern Southland, New Zealand

Published online by Cambridge University Press:  02 April 2024

D. Craw ,
C. A. Landis  and
P. I. Kelsey
D. Craw
Affiliation:
Geology Department, University of Otago, P.O. Box 56, Dunedin, New Zealand
C. A. Landis
Affiliation:
Geology Department, University of Otago, P.O. Box 56, Dunedin, New Zealand
P. I. Kelsey*
Affiliation:
Geology Department, University of Otago, P.O. Box 56, Dunedin, New Zealand
*
1Present address: Department of Geology, University of Canterbury, Christchurch, New Zealand
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Abstract

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Quaternary debris flows derived from ophiolite melange in northern Southland, New Zealand, are locally cemented and veined by cross-fiber and fine-grained chrysotile. Chrysotile was identified by optical, X-ray powder diffraction, electron microprobe, differential thermal (DTA), and infrared analysis methods. Microprobe and DTA also suggested the presence of as much as 6% of sub-microscopic, noncrystalline alumina, probably in the form of pseudoboehmite. Cavity fillings and irregular veins containing chrysotile are as thick as 40 cm and commonly contain lizardite clasts. Calcite commonly accompanies chrysotile as a vein mineral. Magnetite and pyrite are found near and adjacent to chrysotile veins. These accessory minerals imply that the chrysotile formed under alkaline, reducing conditions. Surface water seepages have pH = 9. Remnant debris-flow topography, Holocene radiocarbon dates, and the absence of hot spring activity confirms that chrysotile can form under near-surface, low-temperature conditions. Growth of chrysotile fibers on a lizardite substrate suggests that the chrysotile formed by solution of detrital lizardite and subsequent precipitation in cavities within the debris flow.

Keywords

AuthigenesisChrysotileDebris flowPseudoboehmiteSerpentine
Type
Research Article
Information
Clays and Clay Minerals , Volume 35 , Issue 1 , February 1987 , pp. 43 - 52
Copyright
Copyright © 1987, The Clay Minerals Society

References

Bain, J. A. and Morgan, D. J., 1969 The role of thermal analysis in the evaluation of impure clay deposits as mineral raw materials Clay Miner. 8 171 – 192.CrossRefGoogle Scholar
Barnes, I. and O’Neill, J. R., 1969 The relationships between fluids in some fresh Alpine-style ultramafics and possible serpentinization, western U.S.A Geol. Soc. Amer. Bull. 80 1947 – 1960.CrossRefGoogle Scholar
Barnes, I., O’Neill, J. R. and Trescases, J. J., 1978 Present day serpentinization in New Caledonia, Oman and Yugoslavia Geochim. Cosmochim. Acta 42 144 – 145.CrossRefGoogle Scholar
Bonatti, E., Simmons, E. C., Bregen, D., Hamlyn, P. R. and Lawrence, J., 1983 Ultramafic rock/seawater interaction in the oceanic crust: Mg-silicate (sepiolite) deposit from the Indian Ocean floor Earth Plan. Sci. Lett. 62 229 – 238.CrossRefGoogle Scholar
Brindley, G. W. and Brown, G., 1980 Crystal Structures of Clay Minerals and their X-ray Identification London Mineral. Soc.CrossRefGoogle Scholar
Cashman, S. M. and Whetten, J. T., 1976 Low temperature serpentinization of periodite conglomerate on the west margin of the Chuwankum Graben, Washington Geol. Soc. Amer. Bull. 87 1773 – 1776.2.0.CO;2>CrossRefGoogle Scholar
Chernosky, J. V. Jr., 1975 Aggregate refractive indices and unit cell parameters of synthetic serpentine in the system MgO-Al2O3-SiO2-H2O Amer. Mineral. 60 200 – 208.Google Scholar
Cleaves, E. T., Fisher, D. W. and Bricker, O. P., 1974 Chemical weathering of serpentinite in the eastern Piedmont of Maryland Geol. Soc. Amer. Bull. 85 437 – 444.2.0.CO;2>CrossRefGoogle Scholar
Coleman, R. G., 1966 New Zealand serpentinites and associated metasomatic rocks N.Z. Geol. Survey Bull. .Google Scholar
Coombs, D. S., Landis, C. A., Norris, R. J., Sinton, J. M., Borns, D. J. and Craw, D., 1976 The Dun Mountain ophiolite belt, New Zealand, its tectonic setting, constitution and origin, with special reference to the southern portion Amer. J. Sci. 276 561 – 603.CrossRefGoogle Scholar
Craw, D., 1979 Melanges and associated rocks, Livingstone Mountains, Southland, New Zealand N.Z. J. Geol. Geophys. 22 443 – 454.CrossRefGoogle Scholar
Craw, D. and Landis, C. A., 1980 Authigenic pectolite, stevensite and pyroaurite in a Quaternary debris flow, Southland, New Zealand J. Sed. Pet. 50 497 – 504.Google Scholar
Farmer, V. C., 1974 The Infra-red Spectra of Minerals London Mineralogical Society.CrossRefGoogle Scholar
Garrels, R. M. and Christ, C., 1965 Solutions, Minerals and Equilibria New York Harper and Row.Google Scholar
Hemley, J. J., Montoya, J. W., Christ, C. and Hostetler, P. B., 1977 Mineral equilibria in the MgO-SiO2-H2O system: 1. Talc-chrysotile-forsterite-brucite stability relations Amer. J. Sci. 277 322 – 351.CrossRefGoogle Scholar
Lahodny-Sarc, O., Dragcevic, Z. and Dosen-Sver, D., 1978 The influence of the activity of water on the phase composition of aluminum hydroxides formed by reaction of amalgamated aluminum with water Clays & Clay Minerals 26 153 – 159.CrossRefGoogle Scholar
Laurent, R. and Hebert, Y., 1979 Paragenesis of serpentine assemblages in harzburgite tectonite and dunite cumulate from the Quebec Appalachians Can. Mineral. 17 857 – 869.Google Scholar
LeBot, J., 1962 Hertzian spectroscopy of various aluminas Compt. Rend. 255 2247 – 2249.Google Scholar
Luce, R. W., 1971 Identification of serpentine varieties by infra-red absorption U.S. Geol. Sun. Prof. Pap. 199 – 201.Google Scholar
McKellar, I. C., 1973 Te Anau-Manapouri district 1:50,000 N.Z. Geol. Sure. Misc. Series, Map .Google Scholar
MacKenzie, R. C., 1970 1970 .Google Scholar
Mumpton, F. A. and Thompson, C. S., 1975 Mineralogy and origin of Coalinga asbestos deposit Clays & Clay Minerals 23 131 – 143.CrossRefGoogle Scholar
Naumann, A. W. and Dresher, W. H., 1966 The influence of sample texture on chrysotile dehydroxylation Amer. Mineral. 51 1200 – 1211.Google Scholar
Neal, C. and Stanger, G., 1984 Calcium and magnesium hydroxide precipitation from alkaline groundwaters in Oman, and their significance to the process of serpentinization Mineral. Mag. 48 237 – 241.CrossRefGoogle Scholar
Page, N. J. and Coleman, R. G., 1967 Serpentine mineral analyses and physical properties U.S. Geol. Surv. Prof. Pap. 103 – 107.Google Scholar
Papee, D., Tertian, R. and Biaish, R., 1958 Constitution of gels and crystalline hydrates of alumina Bull. Soc. Chim. France, ser. 5 1301 – 1310.Google Scholar
Postma, G., 1984 Slumps and their deposits in fan delta front and slope Geology 12 27 – 30.2.0.CO;2>CrossRefGoogle Scholar
Sakamoto, T., Koshimuzu, H., Shinoda, S., van Olphen, H. and Veniale, F., 1981 Hydrothermal transformation of some minerals into stevensite Proc. Int. Clay Conf., Bologna, Pavia, 1981 Amsterdam Elsevier 537 – 546.Google Scholar
Serdyuchenko, D. P., 1945 Alumino-chrysotile, a member of the isomorphous series: Serpentine-parakaolinite Dokl. Akad. Nauk USSR 46 117 – 118.Google Scholar
Sinton, J. M., 1975 Structure, petrology and metamorphism of the Red Mountain ophiolite complex, New Zealand .Google Scholar
Suggate, R. P. (1965) Late Pleistocene geology of northern part of South Island, New Zealand: N.Z. Geol. Survey Bull. 77, 87 pp.Google Scholar
Wenner, D. B. and Taylor, H. P., 1973 Oxygen and hydrogen isotope studies of the serpentinization of ultramafic rocks in oceanic environments and continental ophiolite complexes Amer. J. Sci. 273 207 – 239.CrossRefGoogle Scholar
Wicks, F. J. and Plant, A. G., 1979 Electron microprobe and X-ray microbeam studies of serpentine textures Can. Mineral. 17 785 – 830.Google Scholar
Wicks, F. J. and Whittaker, E. J. W., 1977 Serpentine textures and serpentinization Can. Mineral. 15 459 – 488.Google Scholar
Williams, G. J. (1974) 1974 4, 490 pp.Google Scholar
Yalman, R. G., Shaw, E. R. and Colvin, J. F., 1960 The effect of pH and fluoride on the formation of aluminium oxides J. Phys. Chem. 64 300 – 303.CrossRefGoogle Scholar