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<title>UTas ePrints - Pumiceous rhyolitic peperite in ancient submarine volcanic successions</title>
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<meta content="Gifkins, C.C." name="eprints.creators_name" />
<meta content="McPhie, J." name="eprints.creators_name" />
<meta content="Allen, R.L." 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="2007-09-04" name="eprints.datestamp" />
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<meta content="Pumiceous rhyolitic peperite in ancient submarine volcanic
successions" name="eprints.title" />
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<meta content="pumiceous peperite; pumice breccia; rhyolite; submarine volcanic succession; Mount Read Volcanics; Green Tuff Belt" name="eprints.keywords" />
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<meta content="Pumiceous peperite is associated with a rhyolitic sill that intruded wet, unconsolidated, submarine stratified
pumice breccia in the Cambrian Mount Read Volcanics, Australia. Other examples of pumiceous peperite described in
this paper occur at the pumiceous base of a rhyolitic lava and the margins of a rhyolitic cryptodome complex in the
Miocene Green Tuff Belt, Japan. Intervals of pumiceous peperite are thin (less than 15 m), laterally discontinuous, massive, poorly sorted and the clast-to-matrix ratio varies significantly over short distances. They are composed of feldsparphyric tube pumice clasts and domains of clastic sediment that include stratified pumice breccia, pumiceous siltstone and bioturbated mudstone. The sediment domains may be massive or may display relic depositional structures.
Sediment adjacent to pumice clasts is silicified, possibly reflecting induration on contact with hot pumice. Pumiceous
peperite has gradational contacts with in situ and clast-rotated pumiceous hyaloclastite and coherent pumiceous
rhyolite. Gradational relationships between pumiceous peperite and coherent pumiceous rhyolite, pumice clasts with
chilled margins and curviplanar surfaces, and abundant jigsaw-fit texture imply that quench fragmentation and
autobrecciation were the dominant mechanisms of clast formation. The formation of pumiceous peperite is favoured
by a combination of low confining pressure and delayed quenching allowing vesiculation. Pumiceous peperite may
easily be misinterpreted or overlooked as it resembles other pumice-rich facies that are common in submarine volcanic successions. The correct identification of pumiceous peperite can provide evidence to constrain the timing of intrusive episodes in volcanic successions." name="eprints.abstract" />
<meta content="2002-05-15" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content="Journal of Volcanology and Geothermal Research" name="eprints.publication" />
<meta content="114" name="eprints.volume" />
<meta content="1-2" name="eprints.number" />
<meta content="181-203" name="eprints.pagerange" />
<meta content="10.1016/S0377-0273(01)00284-0" name="eprints.id_number" />
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<meta content="Allen, R.L., 1994a. Volcanic facies analysis indicates large pyroclastic eruptions, sill complexes, syn-volcanic grabens and subtle thrusts in the Cambrian Central Volcanic Complex volcanic centre, western Tasmania. In: Cooke, D.R., Kitto, P.A. (Eds.), Contentious Issues in Tasmanian Geology.
Geol. Soc. Aust. Abstr. 39, 41-43.
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<meta content="Pumiceous peperite is associated with a rhyolitic sill that intruded wet, unconsolidated, submarine stratified
pumice breccia in the Cambrian Mount Read Volcanics, Australia. Other examples of pumiceous peperite described in
this paper occur at the pumiceous base of a rhyolitic lava and the margins of a rhyolitic cryptodome complex in the
Miocene Green Tuff Belt, Japan. Intervals of pumiceous peperite are thin (less than 15 m), laterally discontinuous, massive, poorly sorted and the clast-to-matrix ratio varies significantly over short distances. They are composed of feldsparphyric tube pumice clasts and domains of clastic sediment that include stratified pumice breccia, pumiceous siltstone and bioturbated mudstone. The sediment domains may be massive or may display relic depositional structures.
Sediment adjacent to pumice clasts is silicified, possibly reflecting induration on contact with hot pumice. Pumiceous
peperite has gradational contacts with in situ and clast-rotated pumiceous hyaloclastite and coherent pumiceous
rhyolite. Gradational relationships between pumiceous peperite and coherent pumiceous rhyolite, pumice clasts with
chilled margins and curviplanar surfaces, and abundant jigsaw-fit texture imply that quench fragmentation and
autobrecciation were the dominant mechanisms of clast formation. The formation of pumiceous peperite is favoured
by a combination of low confining pressure and delayed quenching allowing vesiculation. Pumiceous peperite may
easily be misinterpreted or overlooked as it resembles other pumice-rich facies that are common in submarine volcanic successions. The correct identification of pumiceous peperite can provide evidence to constrain the timing of intrusive episodes in volcanic successions." name="DC.description" />
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<h1 class="ep_tm_pagetitle">Pumiceous rhyolitic peperite in ancient submarine volcanic successions</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Gifkins, C.C.</span> and <span class="person_name">McPhie, J.</span> and <span class="person_name">Allen, R.L.</span> (2002) <xhtml:em>Pumiceous rhyolitic peperite in ancient submarine volcanic successions.</xhtml:em> Journal of Volcanology and Geothermal Research, 114 (1-2). pp. 181-203. 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/1820/1/Gifkins%2C_McPhie%2C_Allen_-Pumiceous_rhyolitic_peperite.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" border="0" class="ep_doc_icon" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/1820/1/Gifkins%2C_McPhie%2C_Allen_-Pumiceous_rhyolitic_peperite.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />2248Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input value="2295" name="docid" accept-charset="utf-8" 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/S0377-0273(01)00284-0">http://dx.doi.org/10.1016/S0377-0273(01)00284-0</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Pumiceous peperite is associated with a rhyolitic sill that intruded wet, unconsolidated, submarine stratified
pumice breccia in the Cambrian Mount Read Volcanics, Australia. Other examples of pumiceous peperite described in
this paper occur at the pumiceous base of a rhyolitic lava and the margins of a rhyolitic cryptodome complex in the
Miocene Green Tuff Belt, Japan. Intervals of pumiceous peperite are thin (less than 15 m), laterally discontinuous, massive, poorly sorted and the clast-to-matrix ratio varies significantly over short distances. They are composed of feldsparphyric tube pumice clasts and domains of clastic sediment that include stratified pumice breccia, pumiceous siltstone and bioturbated mudstone. The sediment domains may be massive or may display relic depositional structures.
Sediment adjacent to pumice clasts is silicified, possibly reflecting induration on contact with hot pumice. Pumiceous
peperite has gradational contacts with in situ and clast-rotated pumiceous hyaloclastite and coherent pumiceous
rhyolite. Gradational relationships between pumiceous peperite and coherent pumiceous rhyolite, pumice clasts with
chilled margins and curviplanar surfaces, and abundant jigsaw-fit texture imply that quench fragmentation and
autobrecciation were the dominant mechanisms of clast formation. The formation of pumiceous peperite is favoured
by a combination of low confining pressure and delayed quenching allowing vesiculation. Pumiceous peperite may
easily be misinterpreted or overlooked as it resembles other pumice-rich facies that are common in submarine volcanic successions. The correct identification of pumiceous peperite can provide evidence to constrain the timing of intrusive episodes in volcanic successions.</p></div><table style="margin-bottom: 1em" border="0" cellpadding="3" class="not_ep_block"><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">Additional Information:</th><td valign="top" class="ep_row">The definitive version is available online at http://www.sciencedirect.com/</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">pumiceous peperite; pumice breccia; rhyolite; submarine volcanic succession; Mount Read Volcanics; Green Tuff Belt</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">1820</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">04 Sep 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">30 Jan 2008 15:17</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=1820;">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=1820">item control page</a></p>
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