Geology of the Caloris Basin, Mercury: A View from MESSENGER-Reference-Cited by-同舟云学术

Geology of the Caloris Basin, Mercury: A View from MESSENGER

Published:2008-07-04 Issue:5885 Volume:321 Page:73-76
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Murchie Scott L.¹²³⁴⁵,Watters Thomas R.¹²³⁴⁵,Robinson Mark S.¹²³⁴⁵,Head James W.¹²³⁴⁵,Strom Robert G.¹²³⁴⁵,Chapman Clark R.¹²³⁴⁵,Solomon Sean C.¹²³⁴⁵,McClintock William E.¹²³⁴⁵,Prockter Louise M.¹²³⁴⁵,Domingue Deborah L.¹²³⁴⁵,Blewett David T.¹²³⁴⁵

Affiliation:

1. Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA.

2. Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, Washington, DC 20015, USA.

3. Department of Geological Sciences, Arizona State University, Tempe, AZ 85251, USA.

4. Department of Geological Sciences, Brown University, Providence, RI 02906, USA.

5. Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, USA.

Abstract

The Caloris basin, the youngest known large impact basin on Mercury, is revealed in MESSENGER images to be modified by volcanism and deformation in a manner distinct from that of lunar impact basins. The morphology and spatial distribution of basin materials themselves closely match lunar counterparts. Evidence for a volcanic origin of the basin's interior plains includes embayed craters on the basin floor and diffuse deposits surrounding rimless depressions interpreted to be of pyroclastic origin. Unlike lunar maria, the volcanic plains in Caloris are higher in albedo than surrounding basin materials and lack spectral evidence for ferrous iron-bearing silicates. Tectonic landforms, contractional wrinkle ridges and extensional troughs, have distributions and age relations different from their counterparts in and around lunar basins, indicating a different stress history.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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