Utilization of nondestructive techniques for analysis of the Martian meteorite NWA 6963 and its implications for astrobiology

2017 ◽  
Vol 47 (1) ◽  
pp. 86-91 ◽  
Author(s):  
Bruno L. do Nascimento-Dias ◽  
Davi F. de Oliveira ◽  
Alessandra S. Machado ◽  
Olga M.O. Araújo ◽  
Ricardo T. Lopes ◽  
...  
Keyword(s):  
Martian Meteorite ◽  
Nondestructive Techniques

scholarly journals Evidence for Past Life on Early Mars: How the Evidence Stands

2004 ◽  
Vol 213 ◽  
pp. 203-208 ◽  
Author(s):  
Everett K. Gibson ◽  
Kathie L. Thomas-Keprta ◽  
Simon J. Clemett ◽  
David S. Mckay ◽  
Christopher Romanek ◽  
...  
Keyword(s):  
Scientific Community ◽  
Current Status ◽  
Martian Meteorite ◽  
Martian Meteorites ◽  
Past Life ◽  
Early Mars ◽  
World’S Scientific Community

Martian Meteorite ALH84001 contains four unusual features which have been interpreted as possible signatures of relic biogenic activity. After six years of intense study by the world's scientific community, the current status of the biogenic hypothesis is reviewed and shown to still be valid. Furthermore additional features have been observed in two younger Martian meteorites. The strongest argument for possible evidence of biogenic activity within the ALH84001 meteorite is the presence of truncated hexa-octahedral magnetite crystals which are only known on Earth to be the products of biology.

scholarly journals EXAFS Determination of Clay Minerals in Martian Meteorite Allan Hills 84001 and Its Implication for the Noachian Aqueous Environment

Minerals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 176
Author(s):  
Ryoichi Nakada ◽  
Gaku Tanabe ◽  
Iori Kajitani ◽  
Tomohiro Usui ◽  
Masashi Shidare ◽  
...  
Keyword(s):  
Silica Glass ◽  
Large Body ◽  
Aqueous Environment ◽  
Martian Surface ◽  
Exafs Analysis ◽  
Martian Meteorite ◽  
Fe Species ◽  
Allan Hills 84001 ◽  
X Ray Absorption

The aqueous environment of ancient Mars is of significant interest because of evidence suggesting the presence of a large body of liquid water on the surface at ~4 Ga, which differs significantly from the modern dry and oxic Martian environment. In this study, we examined the Fe-bearing minerals in the 4 Ga Martian meteorite, Alan Hills (ALH) 84001, to reveal the ancient aqueous environment present during the formation of this meteorite. Extended X-ray absorption fine structure (EXAFS) analysis was conducted to determine the Fe species in ALH carbonate and silica glass with a high spatial resolution (~1–2 μm). The μ-EXAFS analysis of ALH carbonate showed that the Fe species in the carbonate were dominated by a magnesite-siderite solid solution. Our analysis suggests the presence of smectite group clay in the carbonate, which is consistent with the results of previous thermochemical modeling. We also found serpentine in the silica glass, indicating the decrease of water after the formation of carbonate, at least locally. The possible allochthonous origin of the hematite in the carbonate suggests a patchy redox environment on the ancient Martian surface.

scholarly journals Spectral endmember variability on hyperspectral datasets of a martian meteorite — implications for planetary surfaces

Icarus ◽  
2021 ◽  
Vol 370 ◽  
pp. 114656
Author(s):  
Lu Pan ◽  
Cathy Quantin-Nataf ◽  
Lucia Mandon ◽  
Mélissa Martinot ◽  
Pierre Beck
Keyword(s):  
Planetary Surfaces ◽  
Martian Meteorite ◽  
Endmember Variability

scholarly journals Current Trends in Integration of Nondestructive Testing Methods for Engineered Materials Testing

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6175
Author(s):  
Ramesh Kumpati ◽  
Wojciech Skarka ◽  
Sunith Kumar Ontipuli
Keyword(s):  
Nondestructive Testing ◽  
Data Acquisition ◽  
Mechanical Testing ◽  
Impact Testing ◽  
Materials Testing ◽  
Testing Methods ◽  
Molecular Arrangement ◽  
Nondestructive Techniques ◽  
Nondestructive Testing Methods ◽  
Engineered Materials

Material failure may occur in a variety of situations dependent on stress conditions, temperature, and internal or external load conditions. Many of the latest engineered materials combine several material types i.e., metals, carbon, glass, resins, adhesives, heterogeneous and nanomaterials (organic/inorganic) to produce multilayered, multifaceted structures that may fail in ductile, brittle, or both cases. Mechanical testing is a standard and basic component of any design and fabricating process. Mechanical testing also plays a vital role in maintaining cost-effectiveness in innovative advancement and predominance. Destructive tests include tensile testing, chemical analysis, hardness testing, fatigue testing, creep testing, shear testing, impact testing, stress rapture testing, fastener testing, residual stress measurement, and XRD. These tests can damage the molecular arrangement and even the microstructure of engineered materials. Nondestructive testing methods evaluate component/material/object quality without damaging the sample integrity. This review outlines advanced nondestructive techniques and explains predominantly used nondestructive techniques with respect to their applications, limitations, and advantages. The literature was further analyzed regarding experimental developments, data acquisition systems, and technologically upgraded accessory components. Additionally, the various combinations of methods applied for several types of material defects are reported. The ultimate goal of this review paper is to explain advanced nondestructive testing (NDT) techniques/tests, which are comprised of notable research work reporting evolved affordable systems with fast, precise, and repeatable systems with high accuracy for both experimental and data acquisition techniques. Furthermore, these advanced NDT approaches were assessed for their potential implementation at the industrial level for faster, more accurate, and secure operations.

Detection of decay damage in iron-wood living trees by nondestructive techniques

2015 ◽  
Vol 62 (1) ◽  
pp. 42-51 ◽  
Author(s):  
Cheng-Jung Lin ◽  
Yue-Hsing Huang ◽  
Gwo-Shyong Huang ◽  
Meng-Ling Wu
Keyword(s):  
Nondestructive Techniques
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