Mathematics – Logic
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufm.p13b1387b&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #P13B-1387
Mathematics
Logic
[5480] Planetary Sciences: Solid Surface Planets / Volcanism, [5494] Planetary Sciences: Solid Surface Planets / Instruments And Techniques, [8429] Volcanology / Lava Rheology And Morphology, [8450] Volcanology / Planetary Volcanism
Scientific paper
The Zuni-Bandera volcanic field, near Grants, New Mexico, is comprised of volcanic deposits from several basaltic eruptions during the last million years. This vent field exhibits a diverse group of coalesced lava flows and displays well-preserved volcanic features including a’a and pahoehoe flows, collapsed lava tubes, cinder cones and low shields. The McCartys flow is a 48-km long inflated basalt flow and is the youngest in the field at around 3000 years old. Over the last three years we have used the Zuni-Bandera volcanic field, and the McCartys flow in particular, as a terrestrial analog for exploring planetary volcanic fields, and understanding the role of lava sheet inflation in flow field development. We have conducted three different styles of analog tests, 1) basic field science focused on understanding lava sheet inflation, 2) mission operations tests related to EVA design and real-time modification of traverse plans, and 3) science enabling technology tests. The Zuni-Bandera field is an ideal location for each style of analog test because it provides easy access to a diverse set of volcanic features with variable quality of preservation. However, many limitations must also be considered in order to maximize lessons learned. The McCartys flow displays well-preserved inflation plateaus that rise up to 15 m above the surrounding field. The preservation state enables textures and morphologies indicative of this process to be characterized. However, the pristine nature of the flow does not compare well with the much older and heavily modified inflated flows of Mars and the Moon. Older flows west of McCartys add value to this aspect of analog work because of their degraded surfaces, development of soil horizons, loose float, and limited exposure of outcrops, similar to what might be observed on the Moon or Mars. EVA design tests and science enabling technology tests at the Zuni-Bandera field provide the opportunity to document and interpret the relationships of several overlapping flows in a limited area and also shows the challenge of exploring expansive (100-1000’s square kilometers) volcanic terrains on other planets. The Zuni-Bandera field represents one style of geologic processes (volcanic field development) and in essence is an “end-member” of volcanic field analogs. Results from these studies must be considered with comparable results from other geologic terrains to better represent the complexities of exploring other planetary surfaces.
Aubele Jayne C.
Bleacher Jacob E.
Crumpler Larry S.
Garry Brent W.
Zimbelman James R.
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