Preliminary Findings from Geological Mapping of the Hokusai (h5) Quadrangle of Mercury
نویسندگان
چکیده
Introduction: Quadrangle geological maps from Mariner 10 data cover 45% [1] of the surface of Mercury at 1:5M scale, e.g. [2],[3]. Orbital MESSENGER data, which cover the entire planetary surface, can now be used to produce finer scale geological maps, including regions unseen by Mariner 10. Hokusai quadrangle (0–90° E; 22.5–66° N) is in the hemisphere unmapped by Mariner 10. It contains prominent features which are already being studied, including: Rachmaninoff basin [4], volcanic vents within and around Rachmaninoff [5], much of the Northern Plains [6,7] and abundant wrinkle ridges [8]. Its northern latitude makes it a prime candidate for regional geological mapping since compositional [9,10] and topographical data [11], as well as Mercury Dual Imaging System (MDIS) data [12], are available for geological interpretation. This work aims to produce a map at 1:2M scale, compatible with other new quadrangle maps [e.g. 13] and to complement a global map now in progress [14]. Methods: A basemap of Hokusai (Fig. 4) was constructed (at an average ground resolution of 166 mpp) from the MESSENGER MDIS basemap tiles, including a 5° overlap with the surrounding quadrangles. Using ArcGIS, the basemap was projected into a Lambert Conformable Conic projection for mapping. We are currently mapping geological features at 1:400k scale. Once mapping from this basemap is complete, complex features will be re-examined using local mosaics of high-resolution images and local-scale maps produced. Features: Preliminary mapping suggests several features that warrant in-depth study, making Hokusai quadrangle a particularly interesting area.
منابع مشابه
Preliminary findings from geological mapping of the Hokusai (H5) quadrangle of Mercury
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