Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/446| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Duncan, A. M.; Centre for Volcanic Studies, University of Luton, Luton LU1 3JU, UK | en |
| dc.contributor.authorall | Guest, J. E.; Department of Earth Sciences, University College London, London WC1E 6BT, UK | en |
| dc.contributor.authorall | Stofan, E.; Proxemy Research, 20528 Fancroft Lane, Laytonsville, MD , USA | en |
| dc.contributor.authorall | Anderson, S.; Department of Science, Black Hills State University, Spearfish, SD 57799-9102, USA | en |
| dc.contributor.authorall | Pinkerton, H.; Institute of Environmental Sciences, University of Lancaster, Lancaster LA1 4YQ, UK | en |
| dc.contributor.authorall | Calvari, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia | en |
| dc.date.accessioned | 2005-10-04T15:35:21Z | en |
| dc.date.available | 2005-10-04T15:35:21Z | en |
| dc.date.issued | 2004-04-30 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/446 | en |
| dc.description.abstract | A number of tumuli formed on the aa-dominated lava fan complex which developed in the medial zone of the 1983 flow-field of Mount Etna during the later stages of the eruption. This complex flow-field formed on shallow sloping ground below a scarp between 1900 and 1700 m asl. A major tube system fed a branching tube network in the fan complex. Numerous tumuli and break-outs of lava formed in the fan. Three main types of tumulus are identified: (1) Focal tumuli, which are formed from the break-up and uplift of `old´, thick lava crust and themselves become sustained sites for the distribution of lava both as flows and within distributary tubes. These focal tumuli are significant centres associated with major tubes. (2) Satellite tumuli, which are typically elongate, whale-back shaped features that branch out from focal tumuli. These satellite tumuli were initially lava flows erupted from a focal tumulus. The crust of the flow slowed or came to a halt and the rigid crust became uplifted and fractured, forming a dome-shaped ridge feature. These satellite tumuli continued to be fed from the focal tumulus and became sites of lava emission with numerous break-outs. (3) Distributary tumuli formed on the fan associated with short-lived break-outs from tubes and are relatively simple structures formed from limited effusion of toey lobes and pahoehoe lava. The major tumuli on the fan complex show distinct dilation fractures. The fracture surfaces provide good exposure of the crust and three distinct zones are recognised – an upper zone showing columnar jointing, a middle zone consisting of planar fracture surfaces and a basal zone with distinctive banded planar fracture surfaces showing evidence of both brittle and ductile formation. Using these data a model is proposed for tumulus growth. Field analysis of the fan complex shows how it was fed by a branching tube system, leading to flow thickening, formation of tumuli and numerous ephemeral boccas. | en |
| dc.format.extent | 520 bytes | en |
| dc.format.extent | 1046276 bytes | en |
| dc.format.mimetype | text/html | en |
| dc.format.mimetype | application/pdf | en |
| dc.language.iso | English | en |
| dc.publisher.name | Elsevier | en |
| dc.relation.ispartof | Journal of Volcanology and Geothermal Research | en |
| dc.relation.ispartofseries | 2-3/132(2004) | en |
| dc.subject | aa lava flow-field | en |
| dc.subject | Mount Etna | en |
| dc.subject | tumulus | en |
| dc.subject | lava crust and lava tubes. | en |
| dc.title | Development of tumuli in the medial portion of the 1983 aa flow-field, Mount Etna, Sicily | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.02. Experimental volcanism | en |
| dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.03. Magmas | en |
| dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring | en |
| dc.identifier.doi | 10.1016/S0377-0273(03)00344-5 | en |
| dc.relation.references | Anderson, S.W., Fink J.H., "Crease structures as indicators of emplacement rates and surface stress regimes of lava flows", Geol. Soc. Am. Bull., Volume: 104, (1992), pp. 615-625 Anderson, S.W., Stofan E.R., Smrekar S.E., Guest J.E., Wood B., "Pulsed inflation of pahoehoe lava flows: Implications for flood basalt emplacement", Earth Planet. Sci. Lett., Volume: 168, (1999), pp. 7-18 Bibliographic Page Full text Anderson, S.W., Stofan E.R., Smrekar S.E., Guest J.E., Wood B., "Reply to Self et al., 2000, Comment on `Pulsed inflation of pahoehoe lava flows Implications for flood basalt emplacement´", Earth Planet. Sci. Lett., Volume: 179, (2000), pp. 425-428 Bibliographic Page Full text Calvari, S., Coltelli M., Neri M., Pompilio M., Scribano V., "The 1991-1993 Etna eruption: chronology and lava flow-field evolution", Acta Vulcanol., Volume: 4, (1994), pp. 1-14 Calvari, S., Pinkerton H., "Formation of lava tubes and extensive flow field during the 1991-1993 eruption of Mount Etna", J. Geophys. Res., Volume: 103, (1998), pp. 27291-27301 Calvari, S., Pinkerton H., "Lava tube morphology on Etna and evidence for lava flow emplacement mechanisms", J. Volcanol. Geotherm. Res., Volume: 90, (1999), pp. 263-280 Bibliographic Page Full text Corsaro, R.A., Cristofolini R., "The 1669 eruption at Mount Etna: chronology, petrology and geochemistry, with inferences on the magma sources and ascent mechanisms", Bull. Volcanol., Volume: 58, (1996), pp. 348-358 Bibliographic Page Full text Dobran, F., 1995. Etna magma and lava flow modeling and volcanic system definition aimed at hazard assessment. CEC-EV5V-CT92-0190. Frazzetta, G., Romano R., "The 1983 Etna eruption: event chronology and morphological evolution of the lava flow", Bull. Volcanol., Volume: 47, (1984), pp. 1079-1096 CrossRef Gudmundsson, A., "Stress estimates from the length/width rations of fractures", J. Struct. Geol., Volume: 5, (1983), pp. 623-626 CrossRef Guest, J.E., Underwood J.R., Greeley R., "Role of lava tubes in flows from the Observatory Vent, 1971 eruption on Mount Etna", Geol. Mag., Volume: 117, (1980), pp. 601-606 Guest, J.E., Kilburn C.R.J., Pinkerton H., Duncan A.M., "The evolution of lava flow-fields: observations of the 1981 and 1983 eruptions of Mount Etna, Sicily", Bull. Volcanol., Volume: 49, (1987), pp. 527-540 CrossRef Hughes, J.W., Guest, J.E., Duncan, A.M., 1990. Changing styles of effusive eruption on Mount Etna since AD 1600. In: Ryan, M.P. (Ed.), Magma Transport and Storage. Wiley, London, pp. 385–405. Kilburn, C.R.J., Guest, J.E., 1993. Aa lavas of Mount Etna, Sicily. In: Kilburn, C.R.J., Luongo, G. (Eds.), Active Lavas: Monitoring and Modelling. UCL Press, London, pp. 73–105. Macdonald, G.A., "Pahoehoe, aa, and block lava", Am. J. Sci., Volume: 251, (1953), pp. 169-191 Polacci, M., Papale P., "The evolution of lava flows from ephemeral vents at Mount Etna: Insights from vesicle distribution and morphological studies", J. Volcanol. Geotherm. Res., Volume: 76, (1997), pp. 1-17 Bibliographic Page Full text Polacci, M., Papale P., "The development of compound lava fields at Mount Etna", Phys. Chem. Earth A, Volume: 24, (1999), pp. 949-952 Bibliographic Page Full text Romano, R., "Succession of the volcanic activity in the Etnean area", Mem. Soc. Geol. Ital., Volume: 23, (1982), pp. 27-48 Rossi, M.J., Gudmundsson A., "The morphology and formation of flow-lobe tumuli on Icelandic shield volcanoes", J. Volcanol. Geotherm. Res., Volume: 72, (1996), pp. 291-308 Bibliographic Page Full text Rowland, S.K., Walker G.P.L., "Toothpaste lava: characteristics and origin of a lava structural type transitional between pahoehoe and aa", Bull. Volcanol., Volume: 52, (1987), pp. 631-641 CrossRef Self, S., Keszthelyi L., Thordarson Th., "The importance of pahoehoe", Annu. Rev. Earth Planet. Sci., Volume: 26, (1998), pp. 81-110 CrossRef Stirling, D., Duncan A.M., Guest J.E., Finch A.A., "Petrogenesis of plagioclase phenocrysts of Mount Etna, Sicily, with particular reference to the 1983 eruption: contribution from cathodoluminescence petrography", Mineral. Mag., Volume: 63, (1999), pp. 189-198 Tanguy, J.C., Clocchiatti R., "The Etnean lavas, 1977-1983: petrology and mineralogy", Bull. Volcanol., Volume: 47, (1984), pp. 965-976 CrossRef Walker, G.P.L., "Structure, and origin by injection of lava under surface crust, of tumuli, `lava rises´, `lava-rise pits´, and `lava-inflation clefts´ in Hawaii", Bull. Volcanol., Volume: 53, (1991), pp. 546-558 | en |
| dc.description.fulltext | partially_open | en |
| dc.contributor.author | Duncan, A. M. | en |
| dc.contributor.author | Guest, J. E. | en |
| dc.contributor.author | Stofan, E. | en |
| dc.contributor.author | Anderson, S. | en |
| dc.contributor.author | Pinkerton, H. | en |
| dc.contributor.author | Calvari, S. | en |
| dc.contributor.department | Centre for Volcanic Studies, University of Luton, Luton LU1 3JU, UK | en |
| dc.contributor.department | Department of Earth Sciences, University College London, London WC1E 6BT, UK | en |
| dc.contributor.department | Proxemy Research, 20528 Fancroft Lane, Laytonsville, MD , USA | en |
| dc.contributor.department | Department of Science, Black Hills State University, Spearfish, SD 57799-9102, USA | en |
| dc.contributor.department | Institute of Environmental Sciences, University of Lancaster, Lancaster LA1 4YQ, UK | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | en |
| item.openairetype | article | - |
| item.cerifentitytype | Publications | - |
| item.languageiso639-1 | en | - |
| item.grantfulltext | restricted | - |
| item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
| item.fulltext | With Fulltext | - |
| crisitem.author.dept | Centre for Volcanic Studies, University of Luton, Luton LU1 3JU, UK | - |
| crisitem.author.dept | Department of Earth Sciences, University College London, London WC1E 6BT, UK | - |
| crisitem.author.dept | Proxemy Research, 20528 Fancroft Lane, Laytonsville, MD , USA | - |
| crisitem.author.dept | Department of Science, Black Hills State University, Spearfish, SD 57799-9102, USA | - |
| crisitem.author.dept | Environmental Science Department, Institute of Environmental and Natural Sciences, Lancaster University, Lancaster LA1 4YQ, UK | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | - |
| crisitem.author.orcid | 0000-0001-8189-5499 | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.classification.parent | 04. Solid Earth | - |
| crisitem.classification.parent | 04. Solid Earth | - |
| crisitem.classification.parent | 04. Solid Earth | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| Appears in Collections: | Article published / in press | |
Files in This Item:
| File | Description | Size | Format | Existing users please Login |
|---|---|---|---|---|
| 932 Duncan et al .pdf | 1.02 MB | Adobe PDF | ||
| Elsevier.html | 520 B | HTML | View/Open |
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