Abstract:
The studied volcanic fields are associated with compound flows near the vents that are characterised by a tube network, sky lights, ephemeral vents and tumuli. During discontinuous activity discrete, channel-fed aa flow units in near-vent position often form fanshaped flow fields that resemble vents effused by spatter-fed or clastogenic lava. These flows resulted from (a) reconstitution of fountain-generated spatter around vents by syn-depositional agglutination and coalescence, and (b) syn-eruptive collapse of rapidly grown spatter and scoria. In the studied lava shields three types of tumuli have been identified: (1) lava-coated tumuli, (2) upper-slope tumuli in near-source regions (both dominated in Libya), and (3) flowlobe tumuli in the distal areas (in all studied areas). The widespread flow-lobe tumuli in the studied fields confirm the general agreement of low lava-supply rates. Flow-lobe tumuli are interpreted to have been supplied with magma from tubes that originate in overflow from and through flank fissures connected with the lava lake of shield volcanoes. © 2008 Gebrüder Borntraeger.
Registro:
Documento: |
Artículo
|
Título: | Morphology of lava tumuli from Mendoza (Argentina), Patagonia (Argentina), and Al-Haruj (Libya) |
Autor: | Németh, K.; Haller, M.J.; Martin, U.; Risso, C.; Massaferro, G. |
Filiación: | Volcanic Risk Solutions, Massey University, PO Box 11 222, Palmerston North, New Zealand Centro Nacional Patagonico, UNPSJB, Avda. Boulevard Brown 3500 (9120), Puerto Madryn, Argentina Geo-Zentrum an der KTB, Am Bohrturm 2, 92670 Windischeschenbach, Germany Dept. Geología, FCEN, Ciudad Universitaria, 1428, Buenos Aires, Argentina
|
Palabras clave: | burial (geology); clast; coalescence; geomorphology; lava; Africa; Al Haruj al Aswad; Argentina; Libyan Arab Jamahiriya; Mendoza; North Africa; South America |
Año: | 2008
|
Volumen: | 52
|
Número: | 2
|
Página de inicio: | 181
|
Página de fin: | 194
|
DOI: |
http://dx.doi.org/10.1127/0372-8854/2008/0052-0181 |
Título revista: | Zeitschrift fur Geomorphologie
|
Título revista abreviado: | Z. Geomorphol.
|
ISSN: | 03728854
|
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03728854_v52_n2_p181_Nemeth |
Referencias:
- BONDRE, N.R., DURAISWAMI, R.A., DOLE, G., (2004) Bull, of Volcanol, 66, pp. 29-45. , Morphology and emplacement of flows from the Deccan Volcanic Province, India
- CALVARI, S. & PINKERTON, H. (1998): Formation of lava tubes and extensive flow field during the 1991-1993 eruption of Mount Etna. - J. of Geophys. Res.-Solid Earth 103: 27291-27301; CALVARI, S., NERI, M. & PINKERTON, H. (2003): Effusion rate estimations during the 1999 summit eruption on Mount Etna, and growth of two distinct lava flow fields. - J. of Volcanol. and Geothermal Res. 119: 107-123; DUNCAN, A. M., GUEST, J. E., STOFAN, E. R., ANDERSON, S. W., PINKERTON, H. & CALVARI, S. (2004): Development of tumuli in the medial portion of the 1983 as flow-field, Mount Etna, Sicily. -J. of Volcanol. and Geothermal Res. 132: 173-187; DURAISWAMI, R.A., BONDRE, N.R., DOLE, G., PHADNIS, V.M., KALE, V.S., Tumuli and associated features from the western Deccan Volcanic Province (2001) Bull. of Volcanol, 63, pp. 435-442. , India
- DURAISWAMI, R. A., BONDRE, N., DOLE, G. & PHADNIS, V. (2002): Morphology and structure of flow-lobe tumuli from Pune and Dhule areas, western Deccan Volcanic Province. - J. of the Geol. Soc. of India 60: 57-65; DURAISWAMI, R.A., BONDRE, N.R., DOLE, G., Possible lava tube system in a hummocky lava flow at Daund, western Deccan Volcanic Province, India. - (2004) Proc. of the Indian Academy of Sciences - Earth and Planetary Sciences, 113, pp. 819-829
- HALLER, M. (2004): Eruption mechanisms in the back-arc Crater Basalt Volcanic Field, Northern Patagonia. - IAVCEI General Assembly, Pucon, Chile, CD-version, sO3b_pt_Ø49.pdf; INBAR, M., RISSO, C., PARICA, C., The morphological development of a young lava flow in the South Western Andes - Neuquen, Argentina (1995) Z. Geomorph. N. F, 39, pp. 479-487
- INBAR, M., RISSO, C., A morphological and morphometric analysis of a high density cinder cone volcanic field - Payun Matru, south-central Andes, Argentina (2001) Z. Geomorph. N. F, 45, pp. 321-343
- INBAR, M., RISSO, C., Holocene yardangs in volcanic terrains in the southern Andes, Argentina. - Earth Surf (2001) Proc. and Landf, 26, pp. 657-666
- JOYCE, B., SUTALO, F., Long basaltic lava flows in southeastern Australia: Mt Rouse and other late-Cenozoic flows of the Newer Volcanic Province (1996) Chapman Conf. on long lava flows, pp. 30-31. , Townsville, Australia
- KILBURN, C.R.J., Lava flows and flow fields (2000) Encyclopedia of Volcanoes, pp. 291-306. , SIGURDSSON, H, HOUGHTON, B. F, MCNUTT, S. R, RYMER, H. & STIX, J, ed, Academic Press, San Diego
- MASSAFERRO, G. I., HALLER, M. J., D'ORAZIO, M. & ALRIC, V. I. (2006): Sub-recent volcanism in Northern Patagonia: A tectonomagmatic approach. - J. of Volcanol. and Geothermal Res. 155: 227-243; MATTSSON, H. B. & HOSKULDSSON, A. (2005): Eruption reconstruction, formation of flowlobe tumuli and eruption duration in the 5900 BP Helgafell lava field (Heimaey), south Iceland. - J. of Volcanol. and Geothermal Res. 147: 157-172; NÉMETH, K., SUWESI, K. S., PEREGI, Z., GULÁCSI, Z. & UJSZÁSZI, J. (2003): Plio/Pleistocene flood basalt related scoria and spatter cones, rootless lava flows, and pit craters, Al Haruj Al Abyad, Libya. - Geolines - J. of the Geol. Inst. of AS Czech Republic 15: 98-103; NÉMETH, K., The morphology and origin of wide craters at Al Haruj al Abyad, Libya: Maars and phreatomagmatism in a large intracontinental flood lava field? (2004) Z. Geomorph. N. F, 48, pp. 417-439
- OLLIER, C.D., Tumuli and lava blisters of Victoria, Australia (1964) Nature, 202, pp. 1284-1285
- PÉCSKAY, Z., HALLER, M.J., NÉMETH, K., Preliminary K/Ar geochronology of the Crater Basalt Volcanic Field (CBVF), Northern Patagonia, Argentina (2007) Revista de la Asociatión Geológica Argentina, 62, pp. 25-29
- PEREGI, Z. (2003): Geological map of Libya 1: 250,000, Sheet: Al Haruj al Abyad NG 33-8; Explanatory Booklet. - Geol. Inst, of Hungary and Industrial Res. Centre, Budapest - Tripoli; RISSO, C., NÉMETH, K., COMBINA, A.M., NULLO, F. & DROSINA, M. (2008): The role of phreatomagmatism in a Plio-Pleistocene high-density scoria cone field: Llancanelo Volcanic Field (Mendoza) Argentina. -J. of Volcanol. and Geothermal Res. 169: 61-86; RISSO, C., NÉMETH, K., MARTIN, U., Proposed geotops on Pliocene to Recent pyroclastic cone fields in Mendoza, Argentina (2006) Z. Dt. Geol. Ges, 157, pp. 477-490
- ROSSI, M.J. & GUDMUNDSSON, A. (1996): The morphology and formation of flow-lobe tumuli on Icelandic shield volcanoes. -J. of Volcanol. and Geothermal Res. 72: 291-308; SELF, S., KESZTHELYI, L., THORDARSON, T., The importance of pahoehoe. - Ann (1998) Review of Earth and Planet. Sciences, 26, pp. 81-110
- STEPHENSON, P.J., GRIFFIN, T.J., Some long basaltic lava flows in North Queensland (1976) Volcanism in Australia, pp. 44-51. , R.W.JOHNSON ed, Elsevier, Amsterdam, The Netherlands
- STEPHENSON, P.J., BURCH-JOHNSON, A.T., STANTON, D., Long lava flows in North Queensland: Context, characteristics, emplacement (1996) Chapman conference on long lava flows, pp. 86-87. , Townsville, Australia
- STEPHENSON, P.J., BURCH-JOHNSTON, A. T., STANTON, D. & WHITEHEAD, P. W. (1998): Three long lava flows in north Queensland. - J. of Geophys. Res.-Solid Earth 103: 27359-27370; THORDARSON, T. & SELF, S. (1998): The Roza Member, Columbia River Basalt Group: A gigantic pahoehoe lava flow field formed by endogenous processes? -J. of Geophys. Res.-Solid Earth 103: 27411-27445; 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 (1991) Bull. of Volcanol, 53, pp. 546-558
- WALKER, G.P.L., Basaltic-volcano systems (1993) Magmatic Processes and Plate Tectonics, 76, pp. 3-38. , PRICHARD, H. M, ALABASTER, T, HARRIS, N. B. W & NEARLY, C. R, ed
- WALKER, G.P.L., Basaltic volcanoes and volcanic systems (2000) Encyclopedia of Volcanoes, pp. 283-290. , SIGURDSSON, H, HOUGHTON, B. F, MCNUTT, S. R, RYMER, H. & STIX, J, ed, Academic Press, San Diego
- WILMOTH, R. A. & WALKER, G. P. L. (1993): P-Type and S-Type pahoehoe - a study of vesicle distribution patterns in Hawaiian lava flows. - J. of Volcanol. and Geothermal Res. 55: 129-142
Citas:
---------- APA ----------
Németh, K., Haller, M.J., Martin, U., Risso, C. & Massaferro, G.
(2008)
. Morphology of lava tumuli from Mendoza (Argentina), Patagonia (Argentina), and Al-Haruj (Libya). Zeitschrift fur Geomorphologie, 52(2), 181-194.
http://dx.doi.org/10.1127/0372-8854/2008/0052-0181---------- CHICAGO ----------
Németh, K., Haller, M.J., Martin, U., Risso, C., Massaferro, G.
"Morphology of lava tumuli from Mendoza (Argentina), Patagonia (Argentina), and Al-Haruj (Libya)"
. Zeitschrift fur Geomorphologie 52, no. 2
(2008) : 181-194.
http://dx.doi.org/10.1127/0372-8854/2008/0052-0181---------- MLA ----------
Németh, K., Haller, M.J., Martin, U., Risso, C., Massaferro, G.
"Morphology of lava tumuli from Mendoza (Argentina), Patagonia (Argentina), and Al-Haruj (Libya)"
. Zeitschrift fur Geomorphologie, vol. 52, no. 2, 2008, pp. 181-194.
http://dx.doi.org/10.1127/0372-8854/2008/0052-0181---------- VANCOUVER ----------
Németh, K., Haller, M.J., Martin, U., Risso, C., Massaferro, G. Morphology of lava tumuli from Mendoza (Argentina), Patagonia (Argentina), and Al-Haruj (Libya). Z. Geomorphol. 2008;52(2):181-194.
http://dx.doi.org/10.1127/0372-8854/2008/0052-0181