Mathematics – Logic
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusm.p31a..07z&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #P31A-07
Mathematics
Logic
5464 Remote Sensing, 5470 Surface Materials And Properties, 5480 Volcanism (6063, 8148, 8450), 6225 Mars
Scientific paper
Lava flows chemically similar to rocks seen at the Mars Pathfinder and Mars Exploration Rover landing sites cover part of the western flank of Mauna Kea volcano, Big Island of Hawaii. The flows have been described (Wolfe and Morris, 1996) as Pleistocene-age (65 to 14 ka) aa and blocky aa flows, mantled by 50-100 cm of eolian, tephra-fall, or colluvial deposits. Topographic transects were obtained January, 2004, and February, 2005 and 2006, across two flow lobes in a portion of the flow field previously mapped as Benmoreite, based on chemical data that revealed a combined sodium and potassium oxide total in excess of 8 weight percent along with a silica dioxide content of 55 weight percent. Trimble 4800 and R8 systems were used to obtain Differential Global Positioning System topographic measurements along fourteen transects across the two flows, where each measured point has about 2 cm horizontal and 4 cm vertical precision. The data reveal flow margins of 5 to 30 m relief, including central channels 200 to 400 m in width with levees comparable to the thickest flow margins. A series of ridges on the floor of one channel, arranged transverse to the flow direction, were also surveyed. The physical dimensions of the flow components were used to calculate rheological parameters using several published models, resulting in yield strengths and apparent viscosities generally larger than that typical of basalts but less than that of andesites. Constraints on the average effusion rate are comparable to that of aa flows of similar dimensions. The mantled flows (part of grazing land on the Parker Ranch) have subdued morphology at the meter scale but they preserve relief at the decameter scale, a condition very similar to the thick dust mantle on lava flows abundant in the Tharsis and Elysium provinces of Mars.
Garry Brent W.
Johnston Andrew K.
Williams Steven H.
Zimbelman James R.
No associations
LandOfFree
Mauna Kea Benmoreite lava flows as analogs for lava flows on Mars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Mauna Kea Benmoreite lava flows as analogs for lava flows on Mars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mauna Kea Benmoreite lava flows as analogs for lava flows on Mars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1025024