scholarly journals Near-surface geologic units exposed along Ares Vallis and in adjacent areas: A potential source of sediment at the Mars Pathfinder landing site

1997 ◽  
Vol 102 (E2) ◽  
pp. 4219-4229 ◽  
Author(s):  
Allan H. Treiman
Keyword(s):  
Landing Site ◽  
Near Surface ◽  
Potential Source ◽  
Mars Pathfinder

scholarly journals Rock Location and Property Analysis of Lunar Regolith at Chang’E-4 Landing Site Based on Local Correlation and Semblance Analysis

2020 ◽  
Vol 13 (1) ◽  
pp. 48
Author(s):  
Hanjie Song ◽  
Chao Li ◽  
Jinhai Zhang ◽  
Xing Wu ◽  
Yang Liu ◽  
...  
Keyword(s):  
Electromagnetic Waves ◽  
Lunar Regolith ◽  
Landing Site ◽  
Rock Properties ◽  
The Moon ◽  
Local Correlation ◽  
Near Surface ◽  
Property Analysis ◽  
Stratigraphic Division ◽  
Formation And Evolution

The Lunar Penetrating Radar (LPR) onboard the Yutu-2 rover from China’s Chang’E-4 (CE-4) mission is used to probe the subsurface structure and the near-surface stratigraphic structure of the lunar regolith on the farside of the Moon. Structural analysis of regolith could provide abundant information on the formation and evolution of the Moon, in which the rock location and property analysis are the key procedures during the interpretation of LPR data. The subsurface velocity of electromagnetic waves is a vital parameter for stratigraphic division, rock location estimates, and calculating the rock properties in the interpretation of LPR data. In this paper, we propose a procedure that combines the regolith rock extraction technique based on local correlation between the two sets of LPR high-frequency channel data and the common offset semblance analysis to determine the velocity from LPR diffraction hyperbola. We consider the heterogeneity of the regolith and derive the relative permittivity distribution based on the rock extraction and semblance analysis. The numerical simulation results show that the procedure is able to obtain the high-precision position and properties of the rock. Furthermore, we apply this procedure to CE-4 LPR data and obtain preferable estimations of the rock locations and the properties of the lunar subsurface regolith.

General geology and geomorphology of the Mars Pathfinder landing site

1999 ◽  
Vol 104 (E4) ◽  
pp. 8555-8571 ◽  
Author(s):  
A. W. Ward ◽  
L. R. Gaddis ◽  
R. L. Kirk ◽  
L. A. Soderblom ◽  
K. L. Tanaka ◽  
...  
Keyword(s):  
Landing Site ◽  
General Geology ◽  
Mars Pathfinder

scholarly journals Chemical, multispectral, and textural constraints on the composition and origin of rocks at the Mars Pathfinder landing site

1999 ◽  
Vol 104 (E4) ◽  
pp. 8679-8715 ◽  
Author(s):  
H. Y. McSween ◽  
S. L. Murchie ◽  
J. A. Crisp ◽  
N. T. Bridges ◽  
R. C. Anderson ◽  
...  
Keyword(s):  
Landing Site ◽  
Mars Pathfinder

scholarly journals Seismic investigations of the Martian near-surface at the InSight landing site

2020 ◽  
Author(s):  
Cedric Schmelzbach ◽  
Nienke Brinkman ◽  
David Sollberger ◽  
Sharon Kedar ◽  
Matthias Grott ◽  
...  
Keyword(s):  
Deep Structure ◽  
Landing Site ◽  
P Wave ◽  
Mission Design ◽  
Normal Operation ◽  
Seismic Signals ◽  
Martian Surface ◽  
Broadband Seismometer ◽  
Near Surface ◽  
Martian Regolith

<p>The InSight ultra-sensitive broadband seismometer package (SEIS) was installed on the Martian surface with the goal to study the seismicity on Mars and the deep interior of the Planet. A second surface-based instrument, the heat flow and physical properties package HP<sup>3</sup>, was placed on the Martian ground about 1.1 m away from SEIS. HP<sup>3</sup> includes a self-hammering probe called the ‘mole’ to measure the heat coming from Mars' interior at shallow depth to reveal the planet's thermal history. While SEIS was designed to study the deep structure of Mars, seismic signals such as the hammering ‘noise’ as well as ambient and other instrument-generated vibrations allow us to investigate the shallow subsurface. The resultant near-surface elastic property models provide additional information to interpret the SEIS data and allow extracting unique geotechnical information on the Martian regolith.</p><p>The seismic signals recorded during HP<sup>3</sup> mole operations provide information about the mole attitude and health as well as shed light on the near-surface, despite the fact that the HP<sup>3 </sup>mole continues to have difficulty penetrating below 40 cm (one mole length). The seismic investigation of the HP<sup>3</sup> hammering signals, however, was not originally planned during mission design and hence faced several technical challenges. For example, the anti-aliasing filters of the seismic-data acquisition chain were adapted when recording the mole hammering to allow recovering information above the nominal Nyquist frequency. In addition, the independently operating SEIS, HP<sup>3</sup> and lander clocks had to be correlated more frequently than in normal operation to enable high-precision timing.</p><p>To date, the analysis of the hammering signals allowed us to constrain the bulk P-wave velocity of the volume between the mole tip and SEIS (top 30 cm) to around 120 m/s. This low velocity value is compatible with laboratory tests performed on Martian regolith analogs with a density of around 1500 kg/m<sup>3</sup>. Furthermore, the SEIS leveling system resonances, seismic recordings of atmospheric pressure signals, HP<sup>3</sup> housekeeping data, and imagery provide additional constraints to establish a first seismic model of the shallow (topmost meters) subsurface at the landing site.</p>

scholarly journals The unique Abramovka REE-rich mineralization is a potential source of REE for the Pavlovsk coals deposit (Primorsky Krai, Russia)

2019 ◽  
Vol 98 ◽  
pp. 01007
Author(s):  
Igor Chekryzhov ◽  
Irina Tarasenko ◽  
Elena Vakh ◽  
Sergey Vysotsky
Keyword(s):  
Surface Waters ◽  
Volcanic Rocks ◽  
Geochemical Data ◽  
Similar Distribution ◽  
Humic Matter ◽  
Primorsky Krai ◽  
Peat Accumulation ◽  
Near Surface ◽  
Ree Mineralization ◽  
Potential Source

The unique REE mineralization of the Abramovka ore occurrence, associated near-surface waters, and REE-rich coals of the Pavlovka basin were studied. The authors, on the base of new isotope-geochemical data and K-Ar dating, suggest that the Abramovka REE minerals (hydrocarbonates, hydrophosphates and hydroxides) formed as a result of interaction of the Palaeozoic metasedimentary and Mesozoic volcanic rocks with near-surface waters. In the Pavlovka metalliferous coals, REE are concentrated predominantly in a humic matter that sorbed REE from water solutions during the peat accumulation stage. A similar distribution of REE in the Abramovka ores, associated near-surface waters, and metalliferous coals of the Pavlovka basin suggest that the Abramovka-type mineralization might be a major source of REE enrichment in the Pavlovka coals.

Overview of the Mars Pathfinder Mission and Assessment of Landing Site Predictions

Science ◽  
1997 ◽  
Vol 278 (5344) ◽  
pp. 1743-1748 ◽  
Author(s):  
M. P. Golombek ◽  
R. A. Cook ◽  
T. Economou ◽  
W. M. Folkner ◽  
A. F. C. Haldemann ◽  
...  
Keyword(s):  
Landing Site ◽  
Mars Pathfinder

Slope morphology of hills at the Mars Pathfinder landing site

Icarus ◽  
2011 ◽  
Vol 214 (1) ◽  
pp. 258-264 ◽  
Author(s):  
S.W. Hobbs ◽  
C.F. Pain ◽  
J.D.A. Clarke
Keyword(s):  
Landing Site ◽  
Mars Pathfinder

scholarly journals Selection of the Mars Pathfinder landing site

1997 ◽  
Vol 102 (E2) ◽  
pp. 3967-3988 ◽  
Author(s):  
M. P. Golombek ◽  
R. A. Cook ◽  
H. J. Moore ◽  
T. J. Parker
Keyword(s):  
Landing Site ◽  
Mars Pathfinder ◽  
Selection Of

Rocks at the Mars Pathfinder Landing Site

1999 ◽  
Vol 87 (1) ◽  
pp. 36 ◽  
Author(s):  
Harry Y. McSween ◽  
Scott Murchie
Keyword(s):  
Landing Site ◽  
Mars Pathfinder
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