Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Laboratory models suggest that stretching forces shaped Jupiter Moon's surface

09.07.2014

Processes that shaped the ridges and troughs on the surface of Jupiter's icy moon Ganymede are likely similar to tectonic processes seen on Earth, according to a team of researchers led by Southwest Research Institute (SwRI). To arrive at this conclusion, the team subjected physical models made of clay to stretching forces that simulate tectonic action. The results were published in Geophysical Research Letters.


Left Image: Courtesy of Southwest Research Institute;

Right Image: Courtesy of NASA/JPL SSI image s0552443639

An image of a tabletop-size analog model (left) shows details of fault systems created by extension that visually match an image by spacecraft Galileo of faulted terrain on Ganymede (right).

Physical analog models simulate geologic structures in laboratory settings so that the developmental sequence of various phenomena can be studied as they occur.

The team – including researchers from SwRI, Wheaton College, NASA's Jet Propulsion Laboratory and NuStar Energy LP – created complex patterns of faults in their models, similar to the ridge and trough features seen in some regions of Ganymede. The models consisted of a “wet clay cake” material possessing brittle characteristics to simulate how the icy moon’s lithosphere, the outermost solid shell, responds to stresses by cracking.

The laboratory models suggest that characteristic patterns of ridges and troughs, called grooved terrain on Ganymede, result from its surface being stretched. “The physical models showed a marked similarity to the surface features observed on Ganymede,” said co-author Dr. Danielle Wyrick, a senior research scientist in the SwRI Space Science and Engineering Division.

“From the experiments, it appears that a process in which the crust breaks into separate blocks by large amounts of extension is the primary mechanism for creating these distinct features.”

“Physical analog modeling allows us to simulate the formation of complex three-dimensional geologic structures on Ganymede, without actually going to Ganymede,” said co-author Dr. David Ferrill, director of the Earth, Material and Planetary Sciences Department in the SwRI Geosciences and Engineering Division.

“These scaled models are able to reproduce the fine geometric details of geologic processes, such as faulting, and to develop and test hypotheses for landscape evolution on planetary bodies.”

SwRI researchers previously have used physical analog models to examine the process by which pit crater chains — a series of linear pits, or depressions — develop on Mars, and how magma in the Martian subsurface deforms the surface of the Red Planet.

NASA’s Outer Planets Research Program supported this work. The paper, “Physical models of grooved terrain tectonics on Ganymede,” by D.W. Sims, D.Y. Wyrick, D.A. Ferrill, A.P. Morris, G.C. Collins, R.T. Pappalardo and S.L. Colton, was published by Geophysical Research Letters, 16 June 2014, Volume 41, Issue 11, pages 3774–3778 , (doi 10.1002/2014GL060359).

Editors: An image is available at http://www.swri.org/press/2014/ganymede.htm.

For more information, contact Joe Fohn, (210) 522-4630, or Maria Martinez Stothoff, (210) 522-3305, Communications Department, Southwest Research Institute, PO Drawer 28510, San Antonio, TX 78228-0510

Maria Martinez Stothoff | Eurek Alert!
Further information:
http://www.swri.org/9what/releases/2014/ganymede.htm#.U71Ks2GKDcs

Further reports about: Division Engineering Ganymede Jupiter Laboratory Mars Red Planet SwRI characteristic structures

More articles from Physics and Astronomy:

nachricht Rosetta-Mission: The incredible flight of the lander »Philae«
28.11.2014 | Technische Universität Braunschweig

nachricht University of Minnesota engineers make sound loud enough to bend light on a computer chip
27.11.2014 | University of Minnesota

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Anzeige

Anzeige

Event News

Regional economic cooperation in Central Asia

21.11.2014 | Event News

Educating the Ecucators

13.11.2014 | Event News

36th Annual IATUL Conference 2015: Call for papers and posters

12.11.2014 | Event News

 
Latest News

New substance overcomes treatment-resistance in leukaemia

28.11.2014 | Health and Medicine

How to Save Billions of Gallons of Gasoline

28.11.2014 | Power and Electrical Engineering

NEIKER is studying the impact of climate change on the soil ecosystem

28.11.2014 | Ecology, The Environment and Conservation

VideoLinks
B2B-VideoLinks
More VideoLinks >>>