Abstract
ABSTRACT Mercury’s Debussy Quadrangle (H14) lies between 0–90° E and 22.5–65° S. Here we use MESSENGER data to produce the first geological map of this quadrangle at a scale of 1:3,000,000, based on linework completed at a scale of 1:300,000. We distinguish crater units and plains units. For compatibility with historic and recent maps of other Mercury quadrangles, and with the first global geological map (Main Map), we have made two versions of the map, with craters classified according to a 3-class and a 5-class degradation system. We distinguish additional units for the materials related to the Rembrandt impact basin. We subdivide the plains between the craters into three units: Smooth, Intermediate and Intercrater Plains, which represent different generations of plains formation. At least some of the Smooth Plains postdate the Rembrandt impact event.
Highlights
Mercury’s surface is divided into 15 quadrangles
We present the map of the H-14 Debussy quadrangle (Main Map), which covers 0o E to 90o E, and 22.5° to 65° S
The quadrangle includes part of the Rembrandt impact basin, which has been mapped separately by Hynek et al (2017) and Semenzato et al (2020). Both the Mariner 10 maps and the post-MESSENGER maps show three separate groups of plains materials, which we continue in this paper
Summary
Mercury’s surface is divided into 15 quadrangles. Following Mariner 10’s flybys that imaged a little over 40% of the planet, 1:5,000,000 (1:5M) scale geological maps were made of nine quadrangles: (De Hon et al, 1981; Grolier & Boyce, 1984; Guest & Greeley, 1983; King & Scott, 1990; McGill & King, 1983; Schaber & McCauley, 1980; Spudis & Prosser, 1984; Strom et al, 1990; Trask & Dzurisin, 1984). The quadrangle includes part of the Rembrandt impact basin, which has been mapped separately by Hynek et al (2017) and Semenzato et al (2020) Both the Mariner 10 maps and the post-MESSENGER maps show three separate groups of plains materials, which we continue in this paper. The original Mariner 10 maps used a 5-class system for recording crater degradation, as does the 1:15 million scale project, whereas previous post-MESSENGER 1:3 million scale quadrangle maps use only 3 classes to categorise impact craters, with the exception of Wright et al (2019) who produced versions with 3 and 5 classes, we use both classifications (Main Map). We used eight basemaps to produce the map These are global mosaics made by the MESSENGER team.
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