18 Hits in 9.3 sec

Dependence of the Hydration of the Lunar Surface on the Concentrations of TiO2, Plagioclase, and Spinel

Marcel Hess, Christian Wöhler, Alexey A. Berezhnoy, Janice L. Bishop, Vladislav V. Shevchenko
2021 Remote Sensing  
We investigate the interrelation between the hydration of the lunar regolith and the mineral composition of the surface of the Moon with respect to the concentrations of plagioclase, TiO2 (highly correlated  ...  The spectral properties of lunar regions with a low concentration of plagioclase or a high concentration of TiO2 or Mg-spinel show a significant reduction in hydration at lunar midday compared to other  ...  Acknowledgments: We are grateful to the M 3 team for collecting the data analyzed in this study. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs14010047 fatcat:omg7bjqjwreovf7c4ihnzr3aru

Identification of magnetite in lunar regolith breccia 60016: Evidence for oxidized conditions at the lunar surface

Katherine H. Joy, Channon Visscher, Michael E. Zolensky, Takashi Mikouchi, Kenji Hagiya, Kazumasa Ohsumi, David A. Kring
2015 Meteoritics and Planetary Science  
Lunar regolith breccias are temporal archives of magmatic and impact bombardment processes on the Moon.  ...  Evidence for low-fO 2 conditions is given by (i) the extremely low ferric (3 + ) iron content of lunar samples, and the valence state of Eu in plagioclase (Drake, 1978; Karner et al., 2004) and Cr, Ti,  ...  We thank the helpful reviews by  ... 
doi:10.1111/maps.12462 fatcat:yxqq37tywzerlgb7rxugbvqw2y

The specific heat of astro-materials: Review of theoretical concepts, materials and techniques [article]

Jens Biele, Matthias Grott, Michael E. Zolensky, Artur Benisek, Edgar Dachs
2022 arXiv   pre-print
solid substances found on the surfaces of solar system bodies.  ...  We provide detailed background, theoretical and practical, on the specific heat cp of minerals and mixtures thereof, 'astro-materials', as well as background information on common minerals and other relevant  ...  The heat capacity behaviour related to a phase transition depends on the degree of crystallinity of the crystal (e.g., the concentration of imperfections), is rate-dependent and has hysteresis.  ... 
arXiv:2205.08212v1 fatcat:gg54bkniqfht7aqsadebivalci

Physical, Chemical, and Petrological Characteristics of Chondritic Materials and Their Relationships to Small Solar System Bodies [chapter]

Michael E. Zolensky, Neyda M. Abreu, Michael A. Velbel, Alan Rubin, Noel Chaumard, Takaaki Noguchi, Tatsuhiro Michikami
2018 Primitive Meteorites and Asteroids  
Consequently, implementation of scale-dependent analytical techniques to the study of the chemical, physical, and geotechnical characteristics of these CC-like materials is fundamental to safe mission  ...  The physical properties of boulders at asteroid surfaces and fine particles in asteroid regoliths are consequences of the diverse processes that fragmented them, mobilized them, and redeposited them in  ...  Therefore, the formation of boulders on asteroidal surfaces would depend strongly on the size of body.  ... 
doi:10.1016/b978-0-12-813325-5.00002-1 fatcat:4nyiu4wd5refbk6nelf6iubcra

Atlantic Geoscience Society 2002 Colloquium & Annual General Meeting: Abstracts

2003 Atlantic geology  
Dissociation of gas hydrate is one of the proposed potential mechanisms.  ...  Previous work on lunar impact melt rocks has investigated the relationships between the melt and cooler clasts.  ...  George's Group both on the peninsula and in the immediate offshore.  ... 
doi:10.4138/1256 fatcat:cezhsknusva4hhkwbuepywcz74

Protolith of ultramafic rocks in the Kluane Schist, Yukon, and implications for arc collisions in the northern Cordillera

Dante Canil, Stephen T. Johnston, Rameses J. D'Souza, Larry M. Heaman, Marie-Claude Williamson
2015 Canadian journal of earth sciences (Print)  
The metamorphic history bears on the hydration and dehydration of 66 the ultramafic rocks through the burial and exhumation history of subduction and 67 collision and re-heating.  ...  Absolute concentrations of incompatible 303 elements, even in harzburgitic rocks, can vary with mantle metasomatism, or by 304 distrubrance during surface processes and emplacement of mantle peridotites  ... 
doi:10.1139/cjes-2014-0138 fatcat:iambwjmzjzddvouqwpxletrxfi

Volcanic gases and the reaction of sulfur dioxide with aluminosilicate glasses [article]

Christian Josef Renggli, University, The Australian National, University, The Australian National
The main species in lunar volcanic gas are H2, S2 and CO. This finding is in contrast to previous studies which suggested that CO was the sole driver of explosive volcanic eruptions on the Moon.  ...  and metal budgets of planetary crusts and surfaces.  ...  of the distance from volcanic vents on the lunar surface.  ... 
doi:10.25911/5d5142f0d9852 fatcat:lqsyoiro4zhaldb3v7d7lfvcxe

Volatiles in the Moon: A sulfur and chlorine perspective

Samantha Jane Faircloth
A positive trend is apparent between S⁶⁺/ΣS(tot) and δ³⁴S which is indicative of the dependence of S isotope fractionation on the oxygen fugacity of the late-stage silicate melt.  ...  to compare S oxidation state and S isotopes of lunar apatite for the first time.  ...  As part of the mare volcanism, picritic (ultramafic, Mg-rich) pyroclastic glasses, with a wide range of TiO2 contents, were also erupted onto the lunar surface (e.g. Longhi, 1992) .  ... 
doi:10.21954/ fatcat:4eddr7dfgzd7vetooms274rvuu

On Earth's Mantle Constitution and Structure from Joint Analysis of Geophysical and Laboratory-Based Data: An Example

Amir Khan
2016 Surveys in geophysics  
O; TiO2 ; Cr2 O3 , and partial melt because of lack of thermodynamic data.  ...  The parameters ro ; E, and V depend specifically on the charge transport mechanism in operation.  ... 
doi:10.1007/s10712-015-9353-z fatcat:uyozefs3ifdo3fumkrqxvucztm

Trace: Tennessee Research and Creative Exchange Insights into planetesimal evolution: Petrological investigations of regolithic howardites and carbonaceous chondrite impact melts

Doctoral Dissertations, Nicole Lunning
2015 unpublished
The concentration depends on the solar wind flux, which varies with R -2 (where R is the distance from the sun), and the duration of surface exposure, which will be controlled in part by the impact gardening  ...  One possible means for gauging a sample's former residence on the surface is by the concentration of solar wind gases .  ...  These analogs for the surface regolith of Vesta provide evidence that the vestan surface regolith is assembled from a range of diverse source materials ( > 18 basaltic and ultramafic lithologies).  ... 

Transfer of melts in the sub-arc mantle: Insights from high-pressure experiments and from the New Caledonia ophiolite [article]

Cassian Pirard, University, The Australian National, University, The Australian National
Here we provide the first recent petrological overview of the Massif du Sud ophiolite on the basis of petrological and geochemical data.  ...  The New Caledonia ultramafic ophiolite provides further insights on the interactions which can exist between melts and the upper mantle.  ...  However, the morphology of the spinels s.l. is highly dependant on the position and the composition of the rock in the mantle column.  ... 
doi:10.25911/5d78dc5eea4dc fatcat:pmbffig76rd25hk3f7wamkzzgy

A comparison of iddingsite alteration in two terrestrial basalts and the ALHA 77005 martian meteorite using Raman spectroscopy and electron microprobe analyses

Karla Kuebler
Surface types I and II are both inferred to be plagioclase and pyroxene rich, but Surface type II is also suggested to contain a K-rich obsidian glass.  ...  The isotopic signatures of the goethite in the Lunar Crater iddingsite might give us some indication of its temperature of formation; depending on how far the fractionation factors can be extrapolated.  ... 
doi:10.7936/k73x84p4 fatcat:e44exl6qcbe23namboe7vb6pgu

The Complex Magmatic Evolution and Crustal Processes of Asteroid 4 Vesta

meteorite suite in order to answer longstanding questions regarding the petrogenesis of diogenites and their relationship to eucrites, as well as suggesting what would be expected of the unsampled Vestan  ...  Asteroid 4 Vesta is a surprisingly complex body, recording a vast range of processes and lithologies with many more likely unsampled by the global meteorite collection.  ...  An Introduction to HED Meteorites and Asteroid 4 Vesta Jennifer T. Mitchell 1  ... 
doi:10.26180/14390759 fatcat:ljdyni3xafctdm7slq4yrhmvvq

The parent bodies of fine-grained micrometeorites: A petrologic & spectroscopic perspective

Martin David Suttle, Matthew Genge, Science And Technology Facilities Council (Great Britain)
In this thesis, the geological history, parent body properties and atmospheric entry of fine-grained micrometeorites are investigated through micro-analysis and spectroscopic techniques.  ...  They represent the largest flux of extraterrestrial material currently falling to Earth, with an estimated contribution of 20,000-60,000 tons per year.  ...  Matt Genge who first encouraged me to take up a sixmonth research project in cosmic dust back in 2013 -as part of my master's programme. Dr. Matt Genge and Dr.  ... 
doi:10.25560/68577 fatcat:c6r65xhldfhczbcwystcokok4a

Evaluation of techniques for handling luminescence in Raman spectroscopy for space application in regard to the search for extraterrestrial life

Franziska Hanke, Humboldt-Universität Zu Berlin, Humboldt-Universität Zu Berlin
These techniques include (i) the selection of different excitation wavelengths (325 nm, 532 nm, 785 nm and 1064 nm), which is based on the concept of the spectral separation of the luminescence signals  ...  One of the biggest challenges in conventional RS is the characterization of strongly luminescent biological or mineralogical material; therefore, the dissertation at hand deals with the problem of luminescence  ...  In this study it is mainly concentrated on the results of the lander and rover missions.  ... 
doi:10.18452/21092 fatcat:skdcoeswo5drvgtllalhinxiwi
« Previous Showing results 1 — 15 out of 18 results