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<meta content="Gifkins, C.C." name="eprints.creators_name" />
<meta content="Allen, R.L." name="eprints.creators_name" />
<meta content="McPhie, J." name="eprints.creators_name" />
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<meta content="J.McPhie@utas.edu.au" name="eprints.creators_id" />
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<meta content="2007-09-12" name="eprints.datestamp" />
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<meta content="fiamme; eutaxitic texture; pumice; compaction; diagenesis; alteration; welding; Mount Read Volcanics; Green Tuff Belt; stylolites; apparent textures; volcanic textures" name="eprints.keywords" />
<meta content="Fiamme and eutaxitic texture are common in ancient non-welded, pumice breccias. The fiamme are phyllosilicate-rich lenses that define a bedding-parallel foliation resembling eutaxitic texture in welded ignimbrites.
Pumice breccias in the Cambrian Mount Read Volcanics (Australia) are composed of tube pumice clasts, bubble-wall shards, plagioclase crystal fragments and volcanic lithic clasts, and contain dark green fiamme and stylolites. These sericite or chlorite+sericite fiamme are aligned roughly parallel to regional bedding, and are enclosed in pale pink feldspar+quartz-altered domains of uncompacted, randomly oriented, tube pumice clasts and bubble-wall shards. Similarly, pumice breccias in the Miocene Green Tuff Belt in the Hokuroku Basin (Japan) comprise tube pumice clasts, fiamme, bubble-wall shards, crystal fragments and non-vesicular volcanic clasts. The dark green, wispy smectite or chlorite fiamme are aligned parallel to bedding,
and are enclosed in domains of variably clay-, zeolite- and sericite-altered, uncompacted pumice clasts and shards.
The fiamme in these examples vary in length (0.5 mm to 1 m), length to height ratio (3:1 to 40:1), shape (e.g. flame-like, feathery, branching, bow tie, wedge), and internal texture (porphyritic, massive, vesicular or stylolitic). The fiamme define an anastomosing bedding-parallel, pre-tectonic eutaxitic texture.
Delicate feathery terminations and locally preserved vesicles indicate that the fiamme are altered compacted pumice clasts. The presence of bedding-parallel stylolites and solution seams, undeformed shards and pumice clasts adjacent to the fiamme, and the overprinting of fiamme by the regional cleavage suggest that the fiamme formed during diagenesis, prior to tectonic deformation, and that compaction did not involve welding. Fiamme and eutaxitic texture in these examples resulted from the alteration, dissolution and mechanical compaction of cold tube pumice clasts during diagenesis and lithification." name="eprints.abstract" />
<meta content="2005-04" name="eprints.date" />
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<meta content="Journal of Volcanology and Geothermal Research" name="eprints.publication" />
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<meta content="Allen, R.L., 1988. False pyroclastic textures in altered silicic lavas, with implications for volcanic associated mineralisation. Economic Geology 83, 1424-1446.
Allen, R.L., 1990. Subaqueous welding, or alteration, diagenetic compaction and tectonic dissolution? IAVCEI International Volcanological Congress, Mainz, Germany, vol. 2, Abstracts volume.
Allen, R.L., Cas, R.A.F., 1990. The Rosebery controversy:
distinguishing prospective submarine ignimbrite-like units from true subaerial ignimbrites in the Rosebery-Hercules Zn Cu Pb massive sulphide district, Tasmania. 10th Australian Geological Convention, vol. 25. Geological Society of Australia, pp. 31-32. abstracts volume.
Branney, M.J., Sparks, R.S.J., 1990. Fiamme formed by
diagenesis and burial compaction in soils and subaqueous
sediments. Journal of the Geological Society (London) 147,
919-922.
Cas, R.A.F., Wright, J.V., 1987. Volcanic successions: modern and ancient: a geological approach to processes, products and successions. Allen and Unwin, London, 487 pp.
Christiansen, R.L., Lipman, P.W., 1966. Emplacement and thermal history of the rhyolite lava flow near Forty Mile Canyon, Southern Nevada. Geological Society of America Bulletin 77, 671-684.
Corbett, K.D., 1989. Stratigraphy, palaeogeography and geochemistry of the Mt Read Volcanics. In: Burrett, C.F., Martin, E.L. (Eds.), Geology and Mineral Resources of Tasmania. Special Publication Geological Society of Australia, vol. 15, pp. 86-119.
Corbett, K.D., 1992. Stratigraphic volcanic setting of massive sulfide deposits in the Cambrian Mount Read Volcanics, Tasmania. Economic Geology 87, 564-586.
Corbett, K.D., Lees, T.C., 1987. Stratigraphic and structural relationships and evidence for Cambrian deformation at the western margin of the Mt Read Volcanics, Tasmania, Australia. Australian Journal of Earth Science 34, 45-67.
Crawford, A.J., Berry, R.F., 1992. Tectonic implications of Late Proterozoic-Early Palaeozoic igneous rock associations in western Tasmania. Tectonophysics 214, 37-56.
Dudas, F.O., Campbell, I.H., Gorton, M.P., 1983. Geochemistry of igneous rocks in the Hokuroku District, northern Japan. In: Ohmoto, H., Skinner, B.J. (Eds.), The Kuroko and related volcanogenic massive sulfide deposits. Economic Geology Monograph, vol. 5, pp. 115-133.
Fisher, R.V., 1960. Classification of volcanic breccias. Geological Society of America Bulletin 71, 973-982.
Fisher, R.V., Schmincke, H.-U., 1984. Pyroclastic rocks. Springer-Verlag, New York, 472 pp.
Fiske, R.S., 1969. Recognition and significance of pumice in marine pyroclastic rocks. Geological Society of America Bulletin 80, 1-8.
Fritsch, K.V., Reiss, W., 1868. Geologische Beschreibung der
Insel Teneriffa. Verlag von Wurster and Co., Winterthur,
494 pp.
Gifkins, C.C., 2001. Submarine volcanism and alteration in the Cambrian, northern Central Volcanic Complex, western Tasmania. University of Tasmania PhD thesis, 239 pp.
Gifkins, C.C., Allen, R.L., 2001. Textural and chemical characteristics of diagenetic and hydrothermal alteration in glassy volcanic rocks: examples from the Mount Read Volcanics, Tasmania. Economic Geology 96, 973-1002.
Gifkins, C.C., McPhie, J., 1996. Fiamme associated with silicic pumiceous lavas and intrusions. EOS, Transactions, AGU 77 (22), W125.
Gifkins, C., Allen, R., McPhie, J., 2004. Apparent welding textures in altered pumice-rich rocks. In: McPhie, J., McGoldrick, P. (Eds.), Dynamic earth past, present and future. 17th Australian Geological Convention Abstracts. 8-13 February, Hobart, Tasmania, Australia, p. 267.
Green, G.R., Solomon, M., Walshe, J.L., 1981. The formation of the volcanic-hosted massive sulfide deposit at Rosebery, Tasmania. Economic Geology 76, 304-338.
Iijima, A., 1974. Clay and zeolitic alteration zones surrounding Kuroko deposits in the Hokuroku District, Northern Akita, as submarine hydrothermal-diagenetic alteration products. Mining Geology Special Issue 6, 267-89.
Iijima, A., 1978. Geological occurrences of zeolites in marine environments. In: Sand, L.B., Mumpton, F.A. (Eds.), Natural zeolites; occurrence, properties, use. Pergamon Press, Oxford, pp. 175-198.
Ishikawa, Y., 1983. Volcanic activities and mineralisation of the Fukazawa-Ezuri Kuroko deposits area. Akita University, Mining College, scientific and technological report, 4, 23-32.
McPhie, J., Hunns, S.R., 1995. Secondary welding of submarine, pumice-lithic breccia at Mount Chalmers, Queensland, Australia. Bulletin of Volcanology 57, 170-178.
McPhie, J., Doyle, M., Allen, R.L., 1993. Volcanic textures: a guide to the interpretation of textures in volcanic rocks. CODES. University of Tasmania, Hobart, 198 pp.
Mansfield, G.R., Ross, C.S., 1935. Welded rhyolitic tuffs in
southern Idaho. American Geophysical Union Transactions,
16th Annual Meeting. National Research Council, pp. 308-321.
August, Part 1.
Marsaglia, K.M., Tazaki, K., 1992. Diagenetic trends in Leg 126 sandstones. In: Taylor, B., Fujioka, K., et al. (Eds.), Proc. ODP, Sci. Results, vol. 126. Ocean Drilling Program, College Station, TX, pp. 125-138.
Merino, E., Ortoleva, P., Strickholm, P., 1983. Generation of evenlyspaced pressure solution seams during (late) diagenesis: a kinetic theory. Contributions to Mineralogy and Petrology 82, 360-370.
Nakajima, T., 1988. Geology of the Hokuroku Basin. Kuroko
deposits and geothermal fields in northern honshu, Guidebook, vol. 3. The Geological Society of Mining Geologist of Japan, pp. 5-15.
Ohmoto, H., Takahashi, T., 1983. Part III. Submarine calderas and Kuroko genesis. In: Ohmoto, H., Skinner, B.J. (Eds.), The Kuroko and related volcanogenic massive sulfide deposits. Economic Geology Monograph, vol. 5, pp. 39-54.
Peterson, D.W., 1979. Significance of the flattening of pumice fragments in ash-flow tuffs. In: Chapin, C.E., Elston, W.E. (Eds.), Ash flow tuffs. Special Paper Geological Society of America, vol. 180, pp. 195-204.
Pichler, H., 1981. Italienische Vulkan-gebiete III: Lipari, Vulcano, Stromboli, tyrrhenisches Meer. Sammlung Geologischer Fuhrer, vol. 69. Borntraeger, Berlin.
Ross, C.S., Smith, R.L., 1960. Ash-flow tuffs, their origin,
geological relations and identification. US Geological Survey Professional Paper 366.
Sato, T., 1974. Distribution and geological setting of the Kuroko deposits. Special Issue, vol. 6. Society of Mining Geologists of Japan, pp. 1-9.
Schmincke, H.-U., 1967. Fused tuff and peperites in south central Washington. Geological Society of America Bulletin 78, 319-330.
Sheridan, M.F., 1979. Emplacement of pyroclastic flows: a review. Special Publication Geological Society America 180, 125-136.
Smith, R.L., 1960a. Ash flows. Bulletin of the Geological Society of America 71, 795-842.
Smith, R.L., 1960b. Zones and zonal variations in welded ash flows. US Geological Survey Professional Paper 354-F, 149-159.
Sparks, R.S.J., 1976. Grain size variations in ignimbrites and implications for the transport of pyroclastic flows. Sedimentology 23, 147-188.
Sparks, R.S.J., Wright, J.V., 1979. Welded air-fall tuffs. In: Chapin, C.E., Elston, W.E. (Eds.), Ash flow tuffs. Special Paper Geological Society of America 180, 155-166.
Sparks, R.S.J., Self, S., Walker, G.P.L., 1973. Products of ignimbrite eruptions. Geology 1, 115-118.
Sparks, R.S.J., Stasiuk, M.V., Gardeweg, M., Swanson, D.A., 1993. Welded breccias in andesite lavas. Journal of the Geological Society (London) 150, 897-902.
Tanimura, S., Date, J., Takahashi, T., Ohmoto, H., 1983. Part II. Stratigraphy and structure of the Hokuroku District. In: Ohmoto, H., Skinner, B.J. (Eds.), The Kuroko and related volcanogenic massive sulfide deposits. Economic Geology Monograph, vol. 5, pp. 24-39.
Urabe, T., 1987. Kuroko deposit modelling based on magmatic
hydrothermal theory. Mining Geology 37, 159-176.
Yamagishi, H., 1987. Studies on the neogene subaqueous lavas and hyaloclastites in Southwest Hokkaido. Report of the Geological Survey of Hokkaido 59, 55-117.
Zamboninin, F., 1919. Il tufo pipernoide della Campania e i suoi minerali. Italy, R. Comitato Geologico Mem. v. 7, part 2, pp. 1-130." name="eprints.referencetext" />
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<meta content="Fiamme and eutaxitic texture are common in ancient non-welded, pumice breccias. The fiamme are phyllosilicate-rich lenses that define a bedding-parallel foliation resembling eutaxitic texture in welded ignimbrites.
Pumice breccias in the Cambrian Mount Read Volcanics (Australia) are composed of tube pumice clasts, bubble-wall shards, plagioclase crystal fragments and volcanic lithic clasts, and contain dark green fiamme and stylolites. These sericite or chlorite+sericite fiamme are aligned roughly parallel to regional bedding, and are enclosed in pale pink feldspar+quartz-altered domains of uncompacted, randomly oriented, tube pumice clasts and bubble-wall shards. Similarly, pumice breccias in the Miocene Green Tuff Belt in the Hokuroku Basin (Japan) comprise tube pumice clasts, fiamme, bubble-wall shards, crystal fragments and non-vesicular volcanic clasts. The dark green, wispy smectite or chlorite fiamme are aligned parallel to bedding,
and are enclosed in domains of variably clay-, zeolite- and sericite-altered, uncompacted pumice clasts and shards.
The fiamme in these examples vary in length (0.5 mm to 1 m), length to height ratio (3:1 to 40:1), shape (e.g. flame-like, feathery, branching, bow tie, wedge), and internal texture (porphyritic, massive, vesicular or stylolitic). The fiamme define an anastomosing bedding-parallel, pre-tectonic eutaxitic texture.
Delicate feathery terminations and locally preserved vesicles indicate that the fiamme are altered compacted pumice clasts. The presence of bedding-parallel stylolites and solution seams, undeformed shards and pumice clasts adjacent to the fiamme, and the overprinting of fiamme by the regional cleavage suggest that the fiamme formed during diagenesis, prior to tectonic deformation, and that compaction did not involve welding. Fiamme and eutaxitic texture in these examples resulted from the alteration, dissolution and mechanical compaction of cold tube pumice clasts during diagenesis and lithification." name="DC.description" />
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<h1 class="ep_tm_pagetitle">Apparent welding textures in altered pumice-rich rocks</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Gifkins, C.C.</span> and <span class="person_name">Allen, R.L.</span> and <span class="person_name">McPhie, J.</span> (2005) <xhtml:em>Apparent welding textures in altered pumice-rich rocks.</xhtml:em> Journal of Volcanology and Geothermal Research, 142 (1-2). pp. 29-47. ISSN 0377-0273</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/1905/1/Gifkins%2C_Allen%2C_McPhie_2005_JVGR.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/1905/1/Gifkins%2C_Allen%2C_McPhie_2005_JVGR.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />2391Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input accept-charset="utf-8" value="2399" name="docid" type="hidden" /><div class=""><input value="Request a copy" name="_action_null" class="ep_form_action_button" onclick="return EPJS_button_pushed( '_action_null' )" type="submit" /> </div></form></td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1016/j.jvolgeores.2004.10.012">http://dx.doi.org/10.1016/j.jvolgeores.2004.10.012</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Fiamme and eutaxitic texture are common in ancient non-welded, pumice breccias. The fiamme are phyllosilicate-rich lenses that define a bedding-parallel foliation resembling eutaxitic texture in welded ignimbrites.
Pumice breccias in the Cambrian Mount Read Volcanics (Australia) are composed of tube pumice clasts, bubble-wall shards, plagioclase crystal fragments and volcanic lithic clasts, and contain dark green fiamme and stylolites. These sericite or chlorite+sericite fiamme are aligned roughly parallel to regional bedding, and are enclosed in pale pink feldspar+quartz-altered domains of uncompacted, randomly oriented, tube pumice clasts and bubble-wall shards. Similarly, pumice breccias in the Miocene Green Tuff Belt in the Hokuroku Basin (Japan) comprise tube pumice clasts, fiamme, bubble-wall shards, crystal fragments and non-vesicular volcanic clasts. The dark green, wispy smectite or chlorite fiamme are aligned parallel to bedding,
and are enclosed in domains of variably clay-, zeolite- and sericite-altered, uncompacted pumice clasts and shards.
The fiamme in these examples vary in length (0.5 mm to 1 m), length to height ratio (3:1 to 40:1), shape (e.g. flame-like, feathery, branching, bow tie, wedge), and internal texture (porphyritic, massive, vesicular or stylolitic). The fiamme define an anastomosing bedding-parallel, pre-tectonic eutaxitic texture.
Delicate feathery terminations and locally preserved vesicles indicate that the fiamme are altered compacted pumice clasts. The presence of bedding-parallel stylolites and solution seams, undeformed shards and pumice clasts adjacent to the fiamme, and the overprinting of fiamme by the regional cleavage suggest that the fiamme formed during diagenesis, prior to tectonic deformation, and that compaction did not involve welding. Fiamme and eutaxitic texture in these examples resulted from the alteration, dissolution and mechanical compaction of cold tube pumice clasts during diagenesis and lithification.</p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">fiamme; eutaxitic texture; pumice; compaction; diagenesis; alteration; welding; Mount Read Volcanics; Green Tuff Belt; stylolites; apparent textures; volcanic textures</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/260103.html">260000 Earth Sciences > 260100 Geology > 260103 Vulcanology</a><br /><a href="http://eprints.utas.edu.au/view/subjects/260100.html">260000 Earth Sciences > 260100 Geology</a></td></tr><tr><th valign="top" class="ep_row">Collections:</th><td valign="top" class="ep_row">UNSPECIFIED</td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">1905</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Mrs Katrina Keep</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">12 Sep 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">30 Jan 2008 15:11</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=1905;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=1905">item control page</a></p>
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