Mathematics – Logic
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmep31a0589b&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #EP31A-0589
Mathematics
Logic
[5480] Planetary Sciences: Solid Surface Planets / Volcanism, [6207] Planetary Sciences: Solar System Objects / Comparative Planetology, [6225] Planetary Sciences: Solar System Objects / Mars
Scientific paper
Terrestrial volcanoes studies are being used to develop techniques for interpretation of the styles of volcanic processes and the evolution of volcanic systems on Mars. Detailed characterizations of terrestrial flow fields provide critical evaluation of flow field emplacement on planetary surfaces, namely at vent fissure type features associated to volcanic shields eruptions that help to develop techniques for analyses of planetary flow fields origin and emplacement. For the purpose of this work, field observations, using differential Global Positioning System (dGPS) measurements, and remote sensing analyses, using the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) of some satellitic low shields on the east rift zone of Kilauea Volcano, Hawaii, were collected to allow detailed characterization of the textural and morphologic variability of flow field surfaces as well as provide a means to generate surface unit maps that represent local flow emplacement processes and constrain flow field development. The field characteristics were compared with remote sensing data, including visible and near-infrared spectra. These characteristics were then compared to what is observed on satellitic shield volcanoes on Mars, at the same wavelengths. On Mars, the emplacement of extensive lava flows associated to eruptive vent features in the surroundings of low shield volcanoes occur in two particular regions on Mars; in Syria Planum and at the Tharsis Montes. Their studies have been recently carried out (e.g. Baptista et al., 2008, 2009; Bleacher et al., 2007) using datasets with high spatial and/or spectral resolution, such as with HRSC or HiRISE, namely in what concerns the rheological properties of the flows, the relation and duration of several eruptive periods, and also the depth of the magma chambers. Satellitic shield eruptions on Kilauea contribute significantly to the growth of the volcano and they are closely associated with lava tube systems and long duration eruptions (Rowland and Munro, 1992). Of the 15 satellitic shields on Kilauea (Holcomb, 1987) three formed in post-contact times: Mauna Iki in 1919-1920; Mauna Ulu in 1969-1974; and Kupanaiaba in 1986-1992. The relationship between activity at the summit of Kilauea and downrift provides important support for the connections (hydraulic or not) between the summit and rift zones of Kilauea, as well as information concerning the depth of the magma chambers. This work investigates the textures of surface emplaced lavas to be used to examine flow field growth, development and local flow stratigraphy on Mauna Iki, establishing relations with the other Kilauea satellitic shield volcanoes. Also, in order to characterize regions within flow fields dominated by networks of lava toes and lobes, measurements of toe length, width, thickness, and orientation were done for both Martian and terrestrial analogues. We concluded that the volcanic systems in Syria Planum, Mars and the Kilauea and its satellitic system are analogous concerning their development. Their relation with the regional faulting pattern and morphological features distribution help us to interpret the origin and longstanding evolution of these volcanic provinces.
Baptista Ana Rita
Craddock Robert A.
Zimbelman James R.
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