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Low-Temperature Hydrothermal Alteration of Trachybasalt at Conical Seamount, Papua New Guinea: Formation of Smectite and Metastable Precursor Phases

Published online by Cambridge University Press:  01 January 2024

Giovanna Giorgetti ,
Thomas Monecke ,
Reinhard Kleeberg  and
Mark D. Hannington
Giovanna Giorgetti*
Affiliation:
Dipartimento di Scienze della Terra, Università di Siena, Via Laterina 8, 53100 Siena, Italy
Thomas Monecke
Affiliation:
Department of Geology and Geological Engineering, Colorado School of Mines, 1516 Illinois Street, Golden, CO, 80401 USA
Reinhard Kleeberg
Affiliation:
Institut für Mineralogie, TU Bergakademie Freiberg, Brennhausgasse 14, D-09596 Freiberg, Germany
Mark D. Hannington
Affiliation:
Department of Earth Sciences, University of Ottawa, Marion Hall, 140 Louis Pasteur, Ottawa, ON, K1N 6N5, Canada
*
* E-mail address of corresponding author: giorgettig@unisi.it
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Abstract

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The conversion of volcanic glass to secondary alteration products is one of the most common mineralogical transformations during low-temperature hydrothermal alteration of submarine basalts. To better understand the mechanism and kinetics of this transformation, porphyritic and formerly glassy trachybasalt, recovered from Conical Seamount, Papua New Guinea, was studied in detail. Low-temperature interaction of trachybasalt with hydrothermal fluids at this submerged volcano occurred in response to the formation of submarine epithermal-style gold mineralization. Alteration of the coherent volcanic rocks is heterogeneous with pronounced differences in alteration intensity occurring between igneous minerals and the surrounding glassy groundmass. In comparison to the volcanic glass, the crystalline phases were less prone to hydrothermal alteration with the alteration susceptibility decreasing from clinopyroxene through biotite to feldspar. Low-temperature alteration of clinopyroxene resulted in the formation of abundant saponite-like smectite with no topotactic relationship being observed between the two phases. In contrast, the conversion of biotite to smectite involved structural inheritance as the orientation of common structural blocks was maintained during alteration. Transmission and analytical electron microscopy revealed that pervasive alteration of interstitial glass in the groundmass of the trachybasalt resulted in the formation of montmorillonite- and saponite-like smectite whereby smectite composition is strongly influenced by the glass chemistry. The occurrence of poorly crystalline domains with a 0.3 to 0.4 nm layer spacing in the altered interstitial glass suggests that the transformation of glass to smectite involved the formation of a transitional alteration product. Comparison with the results of previous studies highlights the fact that the glass-to-smectite transformation can proceed through more than one reaction pathway. Reaction style and reaction progress are controlled by kinetic factors such as the mode of fluid transport triggering alteration in the low-temperature hydrothermal environment. Alteration of the trachybasalt at Conical Seamount is inferred to have taken place at a comparably low fluid-rock ratio as the low permeability and the absence of primary fractures and joints restricted fluid circulation through the coherent volcanic rocks.

Keywords

Conical SeamountHydrothermal AlterationGlass-to-smectite TransitionVolcanic GlassMetastable PrecursorsSmectiteTransmission Electron Microscopy
Type
Research Article
Information
Clays and Clay Minerals , Volume 57 , Issue 6 , December 2009 , pp. 725 - 741
Copyright
Copyright © The Clay Minerals Society 2009

References

Alt, J.C. and Teagle, D.A.H., 2003 Hydrothermal alteration of upper oceanic crust formed at a fast-spreading ridge: Mineral, chemical, and isotopic evidence from ODP Site 801 Chemical Geology 201 191–211 10.1016/S0009-2541(03)00201-8.CrossRefGoogle Scholar
Alt, J.C. Honnorez, J. Laverne, C. and Emmermann, R., 1986 Hydrothermal alteration of a 1 km section through the upper oceanic crust, Deep Sea Drilling Project Hole 504B: Mineralogy, chemistry, and evolution of seawater-basalt interactions Journal of Geophysical Research 91 10309–10335 10.1029/JB091iB10p10309.CrossRefGoogle Scholar
Alt, J.C. Teagle, D.A.H. Brewer, T. Shanks, WC III and Halliday, A., 1998 Alteration and mineralization of an oceanic forearc and the ophiolite-ocean crust analogy Journal of Geophysical Research 103 12365–12380 10.1029/98JB00598.CrossRefGoogle Scholar
Andrews, A.J., 1980 Saponite and celadonite in layer 2 basalts, DSDP Leg 37 Contributions to Mineralogy and Petrology 73 323–340 10.1007/BF00376627.CrossRefGoogle Scholar
Banfield, J.F. Jones, B.F. and Veblen, D.R., 1991 An AEM-TEM study of weathering and diagenesis, Abert Lake, Oregon: I. Weathering reactions in the volcanics Geochimica et Cosmochimica Acta 55 2781–2793 10.1016/0016-7037(91)90444-A.CrossRefGoogle Scholar
Bergmann, J. Friedel, P. and Kleeberg, R., 1998 BGMN — A new fundamental parameters based Rietveld program for laboratory X-ray sources, its use in quantitative analysis and structure investigations CPD Newsletter 20 5–8.Google Scholar
Edmond, J.M. Measures, C. McDuff, R.E. Chan, L.H. Collier, R. Grant, B. Gordon, L.I. and Corliss, J.B., 1979 Ridge crest hydrothermal activity and the balances of the major and minor elements in the ocean: The Galapagos data Earth and Planetary Science Letters 46 1–18 10.1016/0012-821X(79)90061-X.CrossRefGoogle Scholar
Eggleton, R.A., 1975 Nontronite topotaxial after hedenbergite American Mineralogist 60 1063–1068.Google Scholar
Eggleton, R.A. and Keller, J., 1982 The palagonitization of limburgite glass — A TEM study Neues Jahrbuch für Mineralogie Monatshefte 1982 321–336.Google Scholar
Essene, E.J. and Peacor, D.R., 1995 Clay mineral thermometry — A critical perspective Clays and Clay Minerals 43 540–553 10.1346/CCMN.1995.0430504.CrossRefGoogle Scholar
Fiore, S. Huertas, F.J. Huertas, F. and Linares, J., 2001 Smectite formation in rhyolitic obsidian as inferred by microscopic (SEM-TEM-AEM) investigation Clay Minerals 36 489–500 10.1180/0009855013640004.CrossRefGoogle Scholar
Gemmell, J.B. Sharpe, R. Jonasson, I.R. and Herzig, P.M., 2004 Sulfur isotope evidence for magmatic contributions to submarine and subaerial gold mineralization: Conical Seamount and the Ladolam gold deposit, Papua New Guinea Economic Geology 99 1711–1725 10.2113/gsecongeo.99.8.1711.CrossRefGoogle Scholar
Giorgetti, G. Marescotti, P. Cabella, R. and Lucchetti, G., 2001 Clay mineral mixtures as alteration products in pillow basalt from the eastern flank of Juan de Fuca Ridge: A TEM-AEM study Clay Minerals 36 75–91 10.1180/000985501547367.CrossRefGoogle Scholar
Giorgetti, G. Monecke, T. Kleeberg, R. and Hannington, M.D., 2006 Low-temperature hydrothermal alteration of silicic glass at the Pacmanus hydrothermal vent field, Manus basin: An XRD, SEM and AEM-TEM study Clays and Clay Minerals 54 240–251 10.1346/CCMN.2006.0540209.CrossRefGoogle Scholar
Harvey, C.C. and Browne, P.R.L., 1991 Mixed-layer clay geothermometry in the Wairakei geothermal field, New Zealand Clays and Clay Minerals 39 614–621 10.1346/CCMN.1991.0390607.CrossRefGoogle Scholar
Herzig, P. Hannington, M. McInnes, B. Stoffers, P. Villinger, H. Seifert, R. Binns, R. and Liebe, T., 1994 Submarine volcanism and hydrothermal venting studied in Papua, New Guinea EOS Transactions of the American Geophysical Union 75 513 10.1029/94EO02009 515–516.CrossRefGoogle Scholar
Herzig, P.M. Petersen, S. Hannington, M.D. and Stanley, C.J., 1999 Epithermal-type gold mineralization at Conical Seamount: A shallow submarine volcano south of Lihir Island, Papua New Guinea Mineral Deposits: Processes to Processing Rotterdam Balkema 527–530.Google Scholar
Huertas, F.J. Fiore, S. and Linares, J., 2004 In situ transformation of amorphous gels into spherical aggregates of kaolinite: A HRTEM study Clay Minerals 39 423–431 10.1180/0009855043940144.CrossRefGoogle Scholar
Humphris, S.E. and Thompson, G., 1978 Hydrothermal alteration of oceanic basalts by seawater Geochimica et Cosmochimica Acta 42 107–125 10.1016/0016-7037(78)90221-1.CrossRefGoogle Scholar
Inoue, A. Utada, M. and Wakita, K., 1992 Smectite-to-illite conversion in natural hydrothermal systems Applied Clay Science 7 131–145 10.1016/0169-1317(92)90035-L.CrossRefGoogle Scholar
Kadko, D. Baross, J. Alt, J., Humphris, S.E. Zierenberg, R.A. Mullineaux, L.S. Thomson, R.E., 1995 The magnitude and global implications of hydrothermal flux Seafloor Hydrothermal Systems: Physical, Chemical, Biological and Geological Interactions Washington American Geophysical Union 446–466.Google Scholar
Kawano, M. Tomita, K. and Kamino, Y., 1993 Formation of clay minerals during low temperature experimental alteration of obsidian Clays and Clay Minerals 41 431–441 10.1346/CCMN.1993.0410404.CrossRefGoogle Scholar
Kristmannsdottir, H., Mortland, M.M. Farmer, V.C., 1979 Alteration of basaltic rocks by hydrothermal activity at 100–300°C International Clay Conference 1978 Amsterdam Elsevier 359–367.Google Scholar
Li, G. Peacor, D.R. and Coombs, D.S., 1997 Transformation of smectite to illite in bentonite and associated sediments from Kaka Point, New Zealand: Contrast in rate and mechanism Clays and Clay Minerals 45 54–67 10.1346/CCMN.1997.0450106.CrossRefGoogle Scholar
Licence, P.S. Terrill, J.E. Fergusson, L.J., 1987 Epithermal gold mineralisation, Ambitle Island, Papua New Guinea Pacific Rim Congress 87: An International Congress on the Geology, Structure, Mineralisation and Economics of the Pacific Rim Parkville, Victoria The Australasian Institute of Mining and Metallurgy 273–278.Google Scholar
Marescotti, P. Vanko, D.A. Cabella, R., Fisher, A. Davis, E.E. Escutia, C., 2000 From oxidizing to reducing alteration: Mineralogical variations in pillow basalts from the East Flank, Juan de Fuca ridge Hydrothermal Circulation in the Oceanic Crust: Eastern Flank of the Juan de Fuca Ridge College Station, Texas Ocean Drilling Program 119–136.Google Scholar
Masuda, H. O’Neil, J.R. Jiang, W.T. and Peacor, D.R., 1996 Relation between interlayer composition of authigenic smectite, mineral assemblages, I/S reaction rate and fluid composition in silicic ash of the Nankai trough Clays and Clay Minerals 44 443–459 10.1346/CCMN.1996.0440402.CrossRefGoogle Scholar
Mclnnes, B.I.A. and Cameron, E.M., 1994 Carbonated, alkaline hybridizing melts from a sub-arc environment: Mantle wedge samples from the Tabar-Lihir-Tanga-Feni arc, Papua New Guinea Earth and Planetary Science Letters 122 125–141 10.1016/0012-821X(94)90055-8.CrossRefGoogle Scholar
Monecke, T. Petersen, S. Herzig, P.M. Petzold, R. Kleeberg, R. and Eliopoulos, D., 2003 Shallow submarine gold mineralization at Conical Seamount, Papua New Guinea: Initial results of an alteration halo study Mineral Exploration and Sustainable Development Rotterdam Millpress 155–158.Google Scholar
Monecke, T. Giorgetti, G. Scholtysek, O. Kleeberg, R. Götze, J. Hannington, M.D. and Petersen, S., 2007 Textural and mineralogical changes associated with the incipient hydrothermal alteration of glassy dacite at the submarine PACMANUS hydrothermal system, eastern Manus basin Journal of Volcanology and Geothermal Research 160 23–41 10.1016/j.jvolgeores.2006.08.007.CrossRefGoogle Scholar
Mottl, M.J. and Wheat, C.G., 1994 Hydrothermal circulation through mid-ocean ridge flanks: Fluxes of heat and magnesium Geochimica et Cosmochimica Acta 58 2225–2237 10.1016/0016-7037(94)90007-8.CrossRefGoogle Scholar
Müller, D. Franz, L. Petersen, S. Herzig, P.M. and Hannington, M.D., 2003 Comparison between magmatic activity and gold mineralization at Conical Seamount and Lihir Island, Papua New Guinea Mineralogy and Petrology 79 259–283 10.1007/s00710-003-0007-3.CrossRefGoogle Scholar
Patrier, P. Papapanagiotou, P. Beaufort, D. Traineau, H. Bril, H. and Rojas, J., 1996 Role of permeability versus temperature in the distribution of the fine (<0.2 µm) clay fraction in the Chipilapa geothermal system (El Salvador, Central America) Journal of Volcanology and Geothermal Research 72 101–120 10.1016/0377-0273(95)00078-X.CrossRefGoogle Scholar
Peacock, M.A., 1926 The petrology of Iceland. Part I. The basic tuffs Transactions of the Royal Society of Edinburgh 55 53–76.Google Scholar
Peacor, D.R. and Buseck, P., 1992 Diagenesis and low-grade metamorphism of shales and slates Minerals and Reactions at the Atomic Scale: Transmission Electron Microscopy Washington, D.C. Mineralogical Society of America 335–380 10.1515/9781501509735-013.CrossRefGoogle Scholar
Petersen, S. Herzig, P.M. Hannington, M.D. Jonasson, I.R. and Arribas, A Jr., 2002 Submarine gold mineralization near Lihir Island, New Ireland fore-arc, Papua New Guinea Economic Geology 97 1795–1813 10.2113/gsecongeo.97.8.1795.CrossRefGoogle Scholar
Petersen, S. Herzig, P.M. Kuhn, T. Franz, L. Hannington, M.D. Monecke, T. and Gemmell, J.B., 2005 Shallow drilling of seafloor hydrothermal systems using the BGS Rockdrill: Conical Seamount (New Ireland fore-arc) and Pacmanus (eastern Manus basin), Papua New Guinea Marine Georesources and Geotechnology 23 175–193 10.1080/10641190500192185.CrossRefGoogle Scholar
Robinson, D. and de Santana Zamora, A., 1999 The smectite to chlorite transition in the Chipilapa geothermal system, El Salvador American Mineralogist 84 607–619 10.2138/am-1999-0414.CrossRefGoogle Scholar
Robinson, D. Schmidt, S.T. and de Santana Zamora, A., 2002 Reaction pathways and reaction progress for the smectite-to-chlorite transformation: Evidence from hydrothermally altered metabasites Journal of metamorphic Geology 20 167–174 10.1046/j.0263-4929.2001.00361.x.CrossRefGoogle Scholar
Rytuba, J.J. McKee, E.H. and Cox, D.P., 1993 Geochronology and geochemistry of the Ladolam gold deposit, Lihir Island, and gold deposits and volcanoes of Tabar and Tatau, Papua New Guinea U.S. Geological Survey Bulletin 2039 119–126.Google Scholar
Schiffman, P. and Fridleifsson, G.O., 1991 The smectite-chlorite transition in drillhole NJ-15, Nesjavellir geothermal field, Iceland: XRD, BSE and electron microprobe investigations Journal of Metamorphic Geology 9 679–696 10.1111/j.1525-1314.1991.tb00558.x.CrossRefGoogle Scholar
Shau, Y.H. and Peacor, D.R., 1992 Phyllosilicates in hydrothermally altered basalts from DSDP Hole 504B, Leg 83 — A TEM and AEM study Contributions to Mineralogy and Petrology 112 119–133 10.1007/BF00310959.CrossRefGoogle Scholar
Simmons, S.F. and Browne, P.R.L., 2000 Hydrothermal minerals and precious metals in the Broadlands-Ohaaki geothermal system: Implications for understanding low-sulfidation epithermal environments Economic Geology 95 971–999 10.2113/gsecongeo.95.5.971.CrossRefGoogle Scholar
Spivack, A.J. and Staudigel, H., 1994 Low-temperature alteration of the upper oceanic crust and the alkalinity budget of seawater Chemical Geology 115 239–247 10.1016/0009-2541(94)90189-9.CrossRefGoogle Scholar
Staudigel, H. and Hart, S.R., 1983 Alteration of basaltic glass: Mechanisms and significance for the oceanic crust-seawater budget Geochimica et Cosmochimica Acta 47 337–350 10.1016/0016-7037(83)90257-0.CrossRefGoogle Scholar
Steiner, A., 1968 Clay minerals in hydrothermally altered rocks at Wairakei, New Zealand Clays and Clay Minerals 16 193–213 10.1346/CCMN.1968.0160302.CrossRefGoogle Scholar
Stewart, W.D. Sandy, M.J., Marlow, M.S. Dadisman, S.V. Exon, N.F., 1988 Geology of New Ireland and Djaul Islands, northeastern Papua New Guinea Geology and Offshore Resources of Pacific Island Arcs — New Ireland and Manus Region, Papua New Guinea Houston, Texas Circum-Pacific Council for Energy and Mineral Resources 13–30.Google Scholar
Stroncik, N.A. and Schmincke, H.U., 2001 Evolution of palagonite: Crystallization, chemical changes, and element budget Geochemistry Geophysics Geosystems 2 2000GC000102 10.1029/2000GC000102.CrossRefGoogle Scholar
Tazaki, K. Fyfe, W.S. and van der Gaast, S.J., 1989 Growth of clay minerals in natural and synthetic glasses Clays and Clay Minerals 37 348–354 10.1346/CCMN.1989.0370408.CrossRefGoogle Scholar
Ufer, K. Roth, G. Kleeberg, R. Stanjek, H. Dohrmann, R. and Bergmann, J., 2004 Description of X-ray powder pattern of turbostratically disordered layer structures with a Rietveld compatible approach Zeitschrift für Kristallographie 219 519–527.CrossRefGoogle Scholar
Ufer, K. Stanjek, H. Roth, G. Dohrmann, R. Kleeberg, R. and Kaufhold, S., 2008 Quantitative phase analysis of bentonites by the Rietveld method Clays and Clay Minerals 56 272–282 10.1346/CCMN.2008.0560210.CrossRefGoogle Scholar
Zhou, Z. and Fyfe, W.S., 1989 Palagonitization of basaltic glass from DSDP Site 335, Leg 37: Textures, chemical composition, and mechanism of formation American Mineralogist 74 1045–1053.Google Scholar
Zhou, Z. Fyfe, W.S. Tazaki, K. and van der Gaast, S.J., 1992 The structural characteristics of palagonite from DSDP Site 335 The Canadian Mineralogist 30 75–81.Google Scholar
Zhou, W. Peacor, D.R. Alt, J.C. van der Voo, R. and Kao, L.S., 2001 TEM study of the alteration of interstitial glass in MORB by inorganic processes Chemical Geology 174 365–376 10.1016/S0009-2541(00)00295-3.CrossRefGoogle Scholar