+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Quantitative morphology, recent evolution, and future activity of the Kameni Islands Volcano, Santorini, Greece

, : Quantitative morphology, recent evolution, and future activity of the Kameni Islands Volcano, Santorini, Greece. Geosphere 2(5): 253-268

Linking quantitative measurements of lava flow surface morphology with historical observations of eruptions is an important, but underexploited, route to understanding eruptions of silicic magma. We present here a new, high-resolution digital elevation model (DEM) for the intracaldera Kameni Islands, Santorini, Greece, which reveals the potential of high-resolution imaging (at approximately 1 m per pixel) of lava-flow fields by airborne light detection and ranging laser radar (LiDAR). The new DEM has an order-of-magnitude better resolution than earlier models, and reveals a wealth of surface morphological information on the dacite lava flows of the Kameni Islands. In turn, this provides quantitative constraints on the bulk rheology of the emplaced lava flows. When combined with a reanalysis of contemporary eruption accounts, these data yield important insights into the behavior of dacite magma during slow effusive eruptions on Santorini and elsewhere, and allow the development of forecasts for the style and duration of future eruptions. Kameni Island lava flows exhibit classic surface morphologies associated with viscous magma: levees and compression folds. Levee heights and flow widths are consistent with a Bingham rheology, and lava yield strengths of 3-7 X 10 (super 4) Pa. Compression folds have long wavelengths (15-25 m), and change only a little downstream; this is consistent with observations of other terrestrial silicic lava flows. The blocky a'a dacite lava-flow margins show a scale-invariant morphology with a typical fractal dimension that is indistinguishable from basaltic Hawaiian a'a, confirming that the fractal dimension is insensitive to the composition of the flow. Dome-growth rates during eruptions of the Kameni Islands in 1866 and 1939 are consistent with a model of slow inflation of a dome with a strong crust. Lava domes on the Kameni Islands have a crustal yield strength (4 X 10 (super 7) Pa) that is lower by a factor of 2-4 than the domes at Pinatubo and Mount St. Helens. The dome-height model combined with the apparent time-predictable nature of volcanic eruptions of the Kameni Islands allow us to suggest that should an eruption occur during 2006, it will last for more than 2.7 yr and produce a dome approximately 115-125 m high.


DOI: 10.1130/ges00028.1

Other references

Coret., 1869: CORET Bull. Soc. Ent. Fr. 1869 p. xiv confirms his assertion that Aphis rosae feeds in winter on po. CORET Bull. Soc. Ent. Fr. 1869 p. xiv) confirms his assertion that Aphis rosae feeds in winter on potatoes.

Beilstein, M.A.; Whanger, P.D., 1992: Selenium metabolism and glutathione peroxidase activity in cultured human lymphoblasts. Effects of transsulfuration defects and pyridoxal phosphate. The metabolism of selenite, selenocysteine (SeCys), and selenomethionine (SeMet) was studied in three human lymphoblast cell lines with defects in the transsulfuration pathway and in control cells without this defect. There were very little differ...

Garasimowicz, G., 2000: Choosing the right refiner plate bolts: a practical guide. Tappi journal 83(2): 51-53

Malatesta, P.; Claramella, A., 1961: Derivatives of benzylphosphoric acid and their relations to pharmacologically active substances. Some benzylphosphonic esters with 1 hydrogen of the methylene group replaced by dialkylamino ethyl chains were synthesized. The various l-dialkylamino-3-phenyl-3-diethoxyphosphoryl propanes recall "Dolantin" (N-methyl-piperidin-4-phenyl-...

Burtscher, H.; Leonardi, A.; Steiner, D.; Baltensperger, U.; Weber, A., 1993: Aging of a combustion particles in the atmosphere: Results from a field study in Zurich. At different locations in Zurich (urban and suburban area) ambient aerosol has been measured by a variety of methods. Total mass concentration, black carbon mass concentration, size distribution, Fuchs surface and photoelectric charging of particl...

Mathew, R.; Colt, S.; Gewitz, M.H., 1994: Nitric oxide production is impaired in rat pulmonary artery during pulmonary hypertension. Moncada, S [Editor], Feelisch, M [Editor], Busse, B [Editor], Higgs, E A [Editor] Portland Press Proceedings; The biology of nitric oxide, Vol 3 Physiological and clinical aspects 253-256

Shanmuganandan S., 2000: Ground water geochemistry and water quality of major rivers of Indian subcontinent; understanding the dimensions and planning for monitoring water quality. International Geological Congress, Abstracts = Congres Geologique International, Resumes 31: (unpaginated

Nakamura, K.; Suzuki, S.; Satomi, G., 1981: Detection of ruptured aneurysm of sinus of Valsalva by contrast two-dimensional echocardiography. The M-mode and two dimensional echocardiographic features are described of a patient with rupture of a sinus of Valsalva aneurysm into the right atrium. A clear echo-free zone arising from the tip of the aneurysm is visualised in the right atrium...

Cohen, A.J.; Belinsky, S.; Franklin, W.; Beard, S., 2002: Molecular and physiologic evidence for 5'CpG island methylation of the endothelin B receptor gene in lung cancer. Chest 121(3 Suppl): 27s-28s

Park, S-Youl.; Fung, P.; Nishimura, N.; Jensen, D.R.; Fujii, H.; Zhao, Y.; Lumba, S.; Santiago, J.; Rodrigues, A.; Chow, T-Fung.F.; Alfred, S.E.; Bonetta, D.; Finkelstein, R.; Provart, N.J.; Desveaux, D.; Rodriguez, P.L.; McCourt, P.; Zhu, J-Kang.; Schroeder, J.I.; Volkman, B.F.; Cutler, S.R., 2009: Abscisic acid inhibits type 2C protein phosphatases via the PYR/PYL family of START proteins. Type 2C protein phosphatases (PP2Cs) are vitally involved in abscisic acid (ABA) signaling. Here, we show that a synthetic growth inhibitor called pyrabactin functions as a selective ABA agonist. Pyrabactin acts through PYRABACTIN RESISTANCE 1 (PY...