| Title | Comparative geological studies of volcanic terrain on Mars: Examples from the Isachsen Formation, Axel Heiberg Island, Canadian High Arctic |
| |
| Author | Williamson, M -C; Smyth, H R; Peterson, R C; Lavoie, D |
| Source | Analogs for Planetary Exploration; Geological Society of America, Special Paper no. 483, 2011 p. 249-261, https://doi.org/10.1130/2011.2483(16) |
| Image |  |
| Year | 2011 |
| Alt Series | Earth Sciences Sector, Contribution Series 20100043 |
| Publisher | Geological Society of America |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Nunavut |
| NTS | 49G/01; 49G/02; 49G/03; 49G/04; 49G/05; 49G/06; 49G/07; 49G/08 |
| Area | Axel Heiberg Island; Mars |
| Lat/Long WENS | -88.0000 -84.0000 79.5000 79.0000 |
| Subjects | igneous and metamorphic petrology; extraterrestrial geology; igneous rocks; volcanic rocks; terrain analysis; carbonate rocks; evaporites; alteration; diapirs; Isachsen Formation; Sverdrup
Basin |
| Illustrations | location maps; photographs |
| Released | 2012 03 05 |
| Abstract | Recent orbital and rover missions to Mars have returned high-resolution images that show complex surface landforms in unprecedented detail. In addition, the spectral data sets from mission instruments
reveal the presence of a wide array of mineral species on the surface of Mars. These discoveries are changing the analog science requirements of projects targeting exploration missions to Mars. Mission managers now expect fi eld deployments to
include complementary investigations of surface processes, rock types, mineral species, and microbial habitats. Earth-based analog sites are selected according to their potential for integrated geological and biological studies, wherein a central
theme is the search for life. Geological fi eld studies on Axel Heiberg Island, in the Canadian Arctic, demonstrate that the Isachsen Formation represents a high-fi delity analog for comparative studies of volcanic terrain on Mars. The two sites of
interest are located in structurally complex zones (chaotic terrain) where basaltic lava fl ows, mafi c dikes, and sandstone beds of Early Cretaceous age intersect evaporite outliers at the periphery of the diapirs. At the North Agate Fiord diapir
and Junction diapir, remnant blocks of basaltic rock are pervasively altered and contain copper and iron sulfi des, as well as the secondary sulfates copiapite, fi broferrite, and jarosite (North Agate Fiord diapir). Alteration zones within poorly
consolidated quartzitic sandstone consist of thin layers of goethite, hematite, illite, and jarosite. The sites are morphologically different from Martian patera, but they provide access to volcanic successions and evaporites in areas of permafrost,
i.e., conditions that are invoked in conceptual models for hydrothermal systems and groundwater flow on Mars. |
| GEOSCAN ID | 285347 |
|
|