Convenor: Ulrike Martin (Heidelberg, Germany) — Ceboruco@web.de
Co-Convenor: Barnabás Korbély (Budapest, Hungary) — korbely@ludens.elte.hu
Maar-diatreme volcanoes are the phreatomagmatic equivalent of scoria cones. Whereas rings and tuff-cones form in shallow water bodies and in groundwater-rich environments maars form in rather “normal” groundwa-ter environments. Maars occur in volcanic fields and on foot plains and inside calderas of polygenetic volcanoes.
Only a few maars erupted in historic times. Maars usually form when magma rises within a fissure and interacts with groundwater.
Hazards associated with maar eruptions are: volcanic earthquakes (up to cca. M: 4-5), possibly several 1000 indi-vidual eruptions, eruption clouds rising to maximum heights of economic air travel, ejection velocities of tephra clasts of up to 400 m/s, ejection distances of ballistic clasts up to 4 km; size of ejected clasts up to 8 m, base surges trav-elling up to several km and with time building a tephra ring of a height up to 100 m and of a radius of up to 4 km (meas-ured from centre of crater), thin distal tephra falls extending to more than 100 km, syn- and post-eruptive slumps and lahars inside and in part also outside the crater, destruction of buildings and transport lines within a radius of up to 5-6 km. Associated formation of the maar crater floor and underlying diatreme results in subsidence of country rocks, tephra, and buildings to depths of possibly 1000-2000 m.
In addition, recent studies have shown that there are hazards associated to recurrence of activity within volcanic fields but also in single maars.
Oral Presentations of Symposium 9 24 September
16.00–16.20 V. Lorenz
SYNERUPTIVE AND POSTERUPTIVE HAZARDS OF MAAR-DIATREME VOLCANOES p. 71
16.20–16.40 L. S. Teng
POTENTIAL THREAT OF LAHAR-INDUCED CATASTROPHIC FLOODING TO
THE TAIPEI METRPOLIS, NORTHERN TAIWAN p. 98
16.40–17.00 K. Moreaux K;J-P. Henriet; G. G. J. Ernst; W. Versteeg; P. Staelens; T. Missiaen;
R.Swennen; P. Lavina
LANDSLIDE HAZARD IN MAAR AND CALDERA LAKES p. 78
25 September
9.00–9.20 B. Korbély;G. Csillag
PROPOSED PROTECTION AND CONSERVATION STRATEGIES OF VOLCANOLOGICAL FEATURES IN A MONOGENETIC VOLCANIC FIELD IN THE WESTERN PANNONIAN BASIN:
A PERSPECTIVE OF BALATON UPLANDS NATIONAL PARK, HUNGARY p. 68
9.20–9.40 M. Felder
THE ONTOGENY OF THE MESSEL MAAR–A TOPIC OF INTEREST FOR GEOTOURISM
AND RECENT RESEARCH p. 52
9.40–10.00 W. J. W. Williams;R. I. Brame; C. S. Jacobs
MEETING THE LEARNING NEEDS OF A MORE DIVERSE POPULATION: APPLYING
UNIVERSAL DESIGN TO VOLCANOLOGY, PETROLOGY AND HAZARDS EDUCATION p. 103 10.00–10.20 K. Németh;U. Martin
PEDAGOGICAL AND DIDACTICAL METHODS IN THE GEOPARK CONCEPT IN THE DEMONSTRATION OF VOLCANIC PROCESSES ASSOCIATED WITH MONOGENETIC VOLCANIC FIELDS IN HUNGARY:
THE MONTESSORI METHOD AS A VIABLE ALTERNATIVE p. 80
Poster Presentations of Symposium 9 24 September: 17.00–18.00 and
25 September: 16.00–17.00
G. T. Mafany;G. G. J. Ernst;C. E. Suh; S. N. Ayonghe
STUDYING TUFF RINGS AND VOLCANIC HAZARDS IN A TROPICAL SETTING: THE CASE OF THE BATOKE TUFF RING,
LIMBE REGION, SW CAMEROON p. 72
H. Mirabueno
THE SAN PABLO MAARS IN SOUTHERN LUZON, PHILIPPINES p. 78
G. Csillag;B. Korbély;K. Németh
VOLCANOLOGICAL SITES OF BALATON UPLANDS NATIONAL PARK AS KEY POINTS FOR A PROPOSED GEOPARK IN
WESTERN HUNGARY p. 49
L. Gaál; K. Gaálová; J. Ganovský;V. Koneèn
NATURE PROTECTION AND TOURISM PROPAGATION IN THE CEROVÁ VRCHOVINA HIGHLAND p. 56 M. Rojas;M. Fort
THE JOYA HONDA MAAR, SAN LUIS POTOSI, MEXICO: INTEGRATION OF A GIS FOR ITS PROPOSAL AS GEOSITE p. 84 B. Zec;M. Stercz; K. Zecova; E. Kaliciakova
GEOSITES, NATURE PROTECTION, GEOTURISM AND GEOLOGICAL — EDUCATIONAL MAP OF THE VIHORLATSKE
VRCHY MTS, SLOVAKIA p. 106
Sz. Harangi;R. Lukács
THE KEMENES VOLCANO PARK IN WESTERN HUNGARY — A PROPOSAL p. 62
Symposium 10
VOLCANIC FIELDS — POLYGENETIC VOLCANOES Convenor: Greg Valentine (Los Alamos, New Mexico, US) — gav@lanl.gov Co-Convenor: Károly Németh, (Budapest, Hungary) — nemeth_karoly@hotmail.com
Volcanic activity in terrestrial settings often results in the formation of volcanic fields rather than single volcanic edi-fices. Volcanic fields, especially basaltic ones, are common volcanic systems on Earth. Monogenetic volcanic fields are those in which individual volcanoes (mainly basaltic) commonly form during single episodes of volcanic activity, without subsequent eruptions, while the volcanic field as a whole may be active for millions of years. Fundamental physical characteristics of volcanic fields that are the focus of current research include 1) the number, type and erup-tion history of individual vents; 2) the timing and recurrence rates of the volcanic eruperup-tions in a given volcanic field, 3) the distribution of vents and volcanic complexes, and 4) the relationship of volcanic fields and the volcanoes within them to tectonic features such as basins, faults and rift zones. In general there are three major elements to be consid-ered in the ascent and emplacement of magma either on Earth or other planets, and each strongly depends on the physical properties and structure of the lithosphere encountered by the magma. The three factors are: 1) magma gen-eration and buoyancy, 2) rheological boundaries in the lithosphere and 3) density boundaries in the lithosphere. In addition to these factors, the stress field (local and regional) plays an important role in controlling magma ascent which is generally related to the structural features of the lithosphere encountered by the magma. In this session we are
call-ing for contributions that address the followcall-ing questions: What determines whether a volcanic field will consist only of scattered monogenetic volcanoes, versus development of one or a few central, polygenetic volcanoes? What are the controlling factors, how these processes can be modelled? How large can a monogenetic volcano be, and what are the criteria that distinguish, or mark the transition between, monogenetic and polygenetic volcanoes? Are all small basaltic centres monogenetic?
We welcome presentations on any approach to addressing these questions, including geochemistry, high-preci-sion geochronology, petrology, geophysics, geomorphology, and spatial analysis. A special topic for this seshigh-preci-sion includes studies on the distribution characteristics of maars versus scoria cones versus polygenetic volcanoes in a vol-canic field.
Oral Presentations of Symposium 10 25 September
10.50–11.10 A. R. McBirney
TEMPORAL AND SPATIAL RELATIONS OF THE FORMATION
OF MONOGENETIC EXPLOSIVE VENTS IN CONE FIELDS p. 77
11.10–11.30 E. Cañón-Tapia;G. P. L. Walker
MONOGENETIC AND POLYGENETIC ACTIVITY AS TWO END MEMBERS OF ONE GENERAL MODEL: TOWARDS A QUANTITATIVE FORMULATION
OF A VOLCANIC SYSTEM p. 47
11.30–11.50 M. J. Haller
TECTONIC CONTROL AND RAPID ASCENT OF PATAGONIAN LAVAS p. 62 11.50–12.10 A. Szakács;K. Balogh; Z. Pécskay; I. Seghedi
NEOGENE–QUATERNARY TIME-SPACE DISTRIBUTION PATTERNS
OF MONOGENETIC MAFIC ALKALINE VOLCANISM IN THE CARPATHIAN–PANNONIAN
REGION. IMPLICATIONS FOR MANTLE PROCESSES p. 95
14.10–14.30 J. Taddeucci;C. Freda; F. Marra; P. Scarlato; M Gaeta; D. M. Palladino; D. Karner;
P. Renne
GEOCHRONOLOGY AND HYDROMAGMATISM AT THE ALBAN HILLS, ITALY:
THE MAARS THAT DID NOT WANT TO BE DATED p. 97
14.30–14.50 B. Zec,M. Kaliciak
A CHARACTER AND DISTRIBUTION OF THE ARC-TYPE BASALTIC ANDESITE TO ANDESITE VOLCANISM IN THE EAST SLOVAKIAN NEOGENE VOLCANIC REGION,
SLOVAKIA p. 105
Poster Presentations of Symposium 10 24 September: 17.00–18.00 and
25 September: 16.00–17.00 N. R. Bondre;W. K. Hart
NATURE AND CAUSES OF COMPOSITIONAL VARIATIONS WITHIN INDIVIDUAL MONOGENETIC VOLCANOES:
INSIGHTS FROM THE COFFEEPOT CRATER, JORDAN VALLEY VOLCANIC FIELD, OREGON. p. 44 R. Jrbashyan
THE LATE-COLLISION BASALTIC VOLCANISM IN THE NORTHEASTERN PART OF THE ARMENIAN HIGHLAND p. 64 V.Koneèn ;. Balogh;D. Vass; J. Lexa
EVOLUTION OF VOLCANIC ACTIVITY IN THE SOUTHERN SLOVAKIA ALKALI BASALT VOLCANIC FIELD p. 67 I. Soós,A. P. Vinkler; A. Szakács
SEARCHING FOR MAAR STRUCTURES IN THE PERSANI MTS, EAST CARPATHIANS, ROMANIA p. 92
J R Wijbrans;C G: Langereis
BASALT CHRONOSTRATIGRAPHY OF NE ICELAND: IMPLICATIONS FOR THE GEOMAGNETIC POLARITY
TIME SCALE p. 102
K. Hidas;Gy. Falus; Cs. Szabó
ANOMALOUS MANTLE STRUCTURES BENEATH THE BAKONY – BALATON HIGHLAND VOLCANIC FIELD:
REVEALED FROM XENOLITHS IN MAAR DEPOSITS p. 63
U. Martin;K. Németh
SEDIMENTARY INTERACTION BETWEEN PYROCLASTIC FLOW DEPOSITS OF THE PORIS MEMBER FROM THE LAS CAÑADAS AND MONOGENETIC VOLCANIC FIELDS IN A BEACH SETTING NEAR MONTAÑA ROJA SCORIA CONE,
TENERIFE SUR, SPAIN p. 73
2IMC P
ARTICIPANTSSurname Name Title Institute Address
Adamoviè Jiøi Dr. Institute of Geologie, Academy Rozvojova 135
adamovic@gli.cas.cz of Sciences of the Czech 16502 Praha6
Republic CZECH REPUBLIC
Auer Andreas Tu Bergakademie Freiberg Galileistr. 25
anja.kriegel@arcor.de 01129 Dresden
GERMANY Balogh Kadosa Dr. Institute of Nuclear Research, Bem t. 18/c
balogh@namafia.atomki.hu Hungarian Academy of 4026 Debrecen
Sciences HUNGARY
Barnett Wayne De Beers, Geological Science Corner of Grownwood and
wayne.barnett@mhs7.tns.co.za Centre Booysens
2013 Johannesburg
REPUBLIC OF SOUTH AFRICA Belousov Alexander Dr. Institute of Volcanology and Michurinsky avenue 19/2–6
belousovsasha@yahoo.com Seismology, Petropavlovsk- 119607 Moscow
Kamchatsky Russia RUSSIA
Bondre Ninad Miami University, Department 114 Shideler Hall, Miami
bondren1@muohio.edu of Geology University
45045 Oxford Ohio USA
Boyer Liane University of British Columbia/ 6339 Stores Road
lboyer@eos.ubc.ca Mineral Seposit Research Unit V6T Vancouver
CANADA
Breitkreuz Christoph Prof. Dr. Institut für Geologie, Tu Bernhard-von-Cotta-str. 2
cbreit@geo.tu-freiberg.de Bergakademie 09599 Freiberg
GERMANY Büchel Georg Prof. Dr. Friedrich-Schiller-Universität Burgweg 11
andreas.goepel@uni-jena.de Jena, Institut für 07749 Jena
Geowissenschaften GERMANY
Buness Hermann Dr. Leibnitz Institute for Applied Stilleweg 2
H.Buness@gga-hannover.de Geosciences 30655 Hannover
GERMANY