Mineral astronomy

File:Panguite-allende-meteorite-1.jpgIn this image the mineral panguite occurs with the scandium-rich silicate davisite embedded in a piece of the Allende meteorite. Credit: Caltech/Chi Ma.

Mineral astronomy is the use of various astronomical techniques to locate and identify minerals and mineral deposits, especially on astronomical rocky objects.

At right is a thin-section image of a slice through the Allende meteorite. The Allende meteorite "lit up Mexico's skies in 1969 [and] scattered thousands of meteorite bits across the northern Mexico state of Chihuahua. ... Panguite [a titanium dioxide mineral] is believed to be among the oldest minerals in the solar system, which is [estimated to be] about 4.5 billion years old. Panguite belongs to a class of refractory minerals that could have formed only under the extreme temperatures and conditions present in the infant solar system."[1]

## Control groups

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Main resource: Control groups

The rigorous detection of a specific mineral may serve as a control group.

## Astronomy

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Main resource: Keynote lectures/Astronomy

"Hibonite (CaAl12O19) and calcium dialuminate (Ca Al4O7) are among the most refractory minerals observed in calcium-, aluminum-rich inclusions (CAIs) in chondritic meteorites."[2]

## Planets

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Main resource: Radiation astronomy/Planets

"Geochemical and spectroscopic evidence for hydrated minerals on main-belt asteroids is best explained if those asteroids were once bathed in liquid water (18, 19)."[3]

## Color astronomy

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Main resources: Radiation astronomy/Colors and Color astronomy

"Glass particles vary in shape, from spheres to angular fragments. The color varies through colorless, yellow, yellowish-brown and brown to red. Glass colors range from homogeneous to heterogeneous, the latter containing admixed mineral relics."[4]

## Minerals

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Main resource: Minerals

Def. "a solid, homogeneous, crystalline chemical element or compound that results from natural inorganic processes" or any "naturally occurring inorganic material that has a (more or less) definite chemical composition and characteristic physical properties"[5] is called a mineral.

Def. a "substance that resembles a mineral but does not exhibit crystallinity"[6] is called a mineraloid.

## Mineraloids

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Main resources: Chemicals/Mineraloids and Mineraloids

"Identifying the minerals and mineraloids that result from aqueous alteration at Gale crater is essential for understanding past aqueous processes at the MSL landing site and hence for interpreting the site's potential habitability."[7]

## Theoretical mineral astronomy

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Main resource: Theory

Here's a theoretical definition:

Def. the astronomy of possible mineral occurrences is called theoretical mineral astronomy.

Determining that an astronomical object is a rocky object is the first step to exploring its minerals.

## Objects

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Main resources: Radiation astronomy/Objects and Object astronomy

Def. a "suspension of dry dust ... in the atmosphere"[8] is called a lithometeor.

"A lithometeor consists of solid particles suspended in the air or lifted by the wind from the ground."[9]

"A lithometeor is the general term for particles suspended in a dry atmosphere; these include dry haze, smoke, dust, and sand."[10]

"Dry haze is an accumulation of very fine dust or salt particles in the atmosphere; it does not block light, but instead causes light rays to scatter. Dry haze particles produce a bluish color when viewed against a dark background, but look yellowish when viewed against a lighter background. This light-scattering phenomenon (called Mie scattering) also causes the visual ranges within a uniformly dense layer of haze to vary depending on whether the observer is looking into the sun or away from it."[10]

Heavy metal pollution may occur in lithometeors.[11]

"The rise of airborne dust is constantly augmenting from the desert (Bilma) to the southern Sahelian stations (Niamey) where it has increased by a factor five. ... the Sahelian zone with airborne dust during the 80s ... All stations have recorded a general increase of wind velocity. The increase of lithometeors frequency as well as the wind velocity during the drought period is not explained by the aridification."[12]

## Meteors

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Main resources: Radiation astronomy/Meteors and Meteor astronomy

Def. the "solid material thrown into the air by a volcanic eruption that settles on the surrounding areas"[13] is called tephra.

"[T]ephra, is a general term for fragments of volcanic rock and lava that are blasted into the air by volcanic explosions or carried upward in the volcanic plume by hot, hazardous gases. The larger fragments usually fall close to the volcano, but the finer particles can be advected quite some distance. ... [Fine ash] can contain rock, minerals, and volcanic glass fragments smaller than .1 inch in diameter, or slightly larger than the size of a pinhead."[10]

## Cosmic rays

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Main resources: Radiation astronomy/Cosmic rays and Cosmic-ray astronomy

"Bombardment by protostellar cosmic rays may make the rock precursors of [Calcium-aluminum-rich inclusions] CAIs and chondrules radioactive, producing radionuclides found in meteorites that are difficult to obtain with other mechanisms."[14]

## Neutrals

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Main resources: Radiation astronomy/Neutrals and Neutrals astronomy

"Measurements by instruments on MESSENGER during the spacecraft's three Mercury flybys have led to discoveries of previously undetected neutral (Mg) and ionized (Ca+) species in Mercury's neutral and ionized exosphere and mapped these and previously known constituents (Na, Ca) on the anti-sunward side of the planet and over the poles. [...] Some ions and neutrals can be released directly from mineral surfaces by electron-stimulated desorption (ESD). Because cross sections of neutrals can be higher than photon-stimulated desorption (PSD) cross sections and because active electron precipitation on both the day and night side of Mercury can produce ESD of ions, at least part of the ionized exosphere is produced directly from surface materials by ESD."[15]

## Neutrinos

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Main resources: Radiation astronomy/Neutrinos and Neutrino astronomy

"Atmospheric neutrinos can interact with the detector producing also hadrons. The most probable of these reactions is the single pion production [20][21]:"[16]

ν μ + p → μ − + π + + p ′ . {\displaystyle \nu _{\mu }+p\rightarrow \mu ^{-}+\pi ^{+}+p^{'}.}

"There is also a small loss due to inelastic hadronic interactions of the decay particles before they are stopped."[16]

The "optical properties of mixtures of PXE [phenyl-o-xylylethane] and derivatives of mineral oils are under investigation [3]."[16]

## Moon

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Main resources: Wanderers/Moon and Moon

Lunar origin is established by comparing the mineralogy, the chemical composition, and the isotopic composition between meteorites and samples from the Moon collected by Apollo missions.

## Mars

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Main resource: Mars

This is an orbital view of Olympus Mons on Mars. Credit: NASA/Corbis.

"Martian meteorites contain a surprising amount of hydrated minerals, which have water incorporated in their crystalline structures. [...] the Martian mantle currently contains between 70 and 300 parts per million of water—enough to cover the planet in liquid 660 to 3,300 feet (200 to 1,000 meters) deep."[17]

"Basically the amount of water we're talking about is equal to or more than the amount in the upper mantle of the Earth," which contains 50 to 300 parts per million of water.[18]

"The meteorites are basaltic, which means the rocks must have formed from deep magmas brought to the surface during volcanic eruptions. By carefully examining a mineral called apatite, McCubbin's team found hydroxyl ions—a form of water that contains an oxygen atom bound to a hydrogen atom."[17] Bold added.

"The presence of hydroxyl means that standard water—oxygen bound to two hydrogens—was also present in Martian magma. But because the hydroxyl is more tightly bound to rock than ordinary water, the ions remained behind when the rest of the water boiled out of the cooling lava."[17]

"We're using apatite as a hydrometer to record how much water was in the rock before it degassed," [...] the Mars meteorites examined in the new study came from extremely young basalts, only 150 to 350 million years old. [...] "That makes these volcanic regions the most promising regions in which to look for past life on Mars".[18]

## Hypotheses

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Main resource: Hypotheses

1. The first step in determining that an astronomical object is a rocky object is to detect molecules.

## See also

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## References

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1. ↑ Jeanna Bryner (June 26, 2012). 1969 Fireball Meteorite Reveals New Ancient Mineral. LiveScience. http://www.livescience.com/21197-allende-meteorite-panguite-mineral.html. Retrieved 2013-11-01.
2. ↑ B. Fegley, Jr. (1991). "The Stability of Calcium Aluminate Minerals in the Solar Nebula". Abstracts of the Lunar and Planetary Science 22: 367. http://articles.adsabs.harvard.edu//full/1991LPI....22..367F/0000367.000.html. Retrieved 2015-06-21.
3. ↑ Henry H. Hsieh; David Jewitt (April 2006). "A Population of Comets in the Main Asteroid Belt". Science 312 (5773): 561-3. http://www.researchgate.net/profile/Henry_Hsieh2/publication/7222138_A_population_of_comets_in_the_main_asteroid_belt/links/00b4951a923408accf000000.pdf. Retrieved 2015-06-21.
4. ↑ YK Kim; SM Lee; JH Yang; JH Kim (1971). "Mineralogical and chemical studies of lunar fines 10084, 148 and 12070, 98". Proceedings of the Lunar Science Conference 1: 747-53. http://adsabs.harvard.edu/full/1971LPSC....2..747K. Retrieved 2015-06-21.
5. ↑ mineral. San Francisco, California: Wikimedia Foundation, Inc. August 29, 2013. https://en.wiktionary.org/wiki/mineral. Retrieved 2013-08-30.
6. ↑ mineraloid. San Francisco, California: Wikimedia Foundation, Inc. April 20, 2011. http://en.wiktionary.org/wiki/mineraloid. Retrieved 2012-10-23.
7. ↑ Rampe, E. B.; Morris, R. V.; Chipera, S.; Bish, D. L.; Bristow, T.; Archer, P. D.; Blake, D.; Achilles, C. et al. (Fall 2013). Characterizing the Phyllosilicates and Amorphous Phases Found by MSL Using Laboratory XRD and EGA Measurements of Natural and Synthetic Materials. P21D. American Geophysical Union. pp. D-08. http://adsabs.harvard.edu/abs/2013AGUFM.P21D..08R. Retrieved 2015-06-21.
8. ↑ lithometeor. San Francisco, California: Wikimedia Foundation, Inc. October 21, 2010. http://en.wiktionary.org/wiki/lithometeor. Retrieved 2013-02-15.
9. ↑ PJ Ozer (1995). Fantechi, R.. ed. Lithometeors in relation with desertification in the Sahelian area of Niger, In: Desertification in a European context: physical and socio-economic aspects. Luxembourg: Office for Official Publications of the European Community. pp. 567-74. ISBN 92-827-4163-X. http://www.cabdirect.org/abstracts/19971901329.html. Retrieved 2013-02-17.
10. ↑ 10.0 10.1 10.2 Mark R. Mireles; Kirth L. Pederson; Charles H. Elford (February 21, 2007). Meteorologial Techniques. Offutt Air Force Base, Nebraska, USA: Air Force Weather Agency/DNT. http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA466107. Retrieved 2013-02-17.
11. ↑ Jian-qiao Yu; Xia1 Wang; Li Wen; Jing-shun Wang (April 2008). "Studies on Correlation of Heavy Metal Pollution in Soil, Lithometeor". Journal of Agricultural Science and Technology (04). http://en.cnki.com.cn/Article_en/CJFDTOTAL-NKDB200804025.htm. Retrieved 2013-02-17.
12. ↑ P. Ozer (1998). G. Demaree. ed. Lithometeors and wind velocity in relation with desertification during the dry season from 1951 to 1994 in Niger, In: International Conference on tropical climatology, meteorology and hydrology in memoriam Franz Bultot. Bruxelles (Belgium): Royal Meteorological Institute of Belgium; Royal Academy of Overseas Sciences. pp. 212-27. http://agris.fao.org/agris-search/search/display.do?f=1999/BE/BE99007.xml;BE1999001164. Retrieved 2013-02-17.
13. ↑ tephra. San Francisco, California: Wikimedia Foundation, Inc. August 31, 2012. http://en.wiktionary.org/wiki/tephra. Retrieved 2013-02-17.
14. ↑ Typhoon Lee; Frank H. Shu; Hsien Shang; Alfred E. Glassgold; K. E. Rehm (October 20, 1998). "Protostellar cosmic rays and extinct radioactivities in meteorites". The Astrophysical Journal 506 (2): 898-912. doi:10.1086/306284. http://iopscience.iop.org/0004-637X/506/2/898. Retrieved 2013-11-04.
15. ↑ Sprague, Ann L.; Vervack, R. J.; Killen, R. M.; McClintock, W. E.; Starr, R. D.; Schriver, D.; Trávnícek, P.; Orlando, T. M. et al. (2010). "MESSENGER: Insights Regarding the Relationship between Mercury's Surface and Its Neutral and Ionized Exosphere". Bulletin of the American Astronomical Society 42 (21.01): 985. http://adsabs.harvard.edu/abs/2010DPS....42.2101S. Retrieved 2015-06-21.
16. ↑ 16.0 16.1 16.2 T. Marrodán Undagoitia; F. von Feilitzsch; M. Göger-Neff; C. Grieb; K. A. Hochmuth; L. Oberauer; W. Potzel; M. Wurm (1 October 2005). "Search for the proton decay p→ K+ ν in the large liquid scintillator low energy neutrino astronomy detector LENA". Physical Review D 72 (7): 075014. doi:10.1103/PhysRevD.72.075014. http://arxiv.org/pdf/hep-ph/0511230.pdf. Retrieved 2015-06-21.
17. ↑ 17.0 17.1 17.2 Richard A. Lovett (June 26, 2012). Mars Has "Oceans" of Water Inside?. National Geographic society. http://news.nationalgeographic.com/news/2012/06/120626-mars-water-mantle-oceans-meteorites-space-science/. Retrieved 2013-11-01.
18. ↑ 18.0 18.1 Francis McCubbin (June 26, 2012). Mars Has "Oceans" of Water Inside?. National Geographic society. http://news.nationalgeographic.com/news/2012/06/120626-mars-water-mantle-oceans-meteorites-space-science/. Retrieved 2013-11-01.

## Further reading

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* Jeanna Bryner (June 26, 2012). 1969 Fireball Meteorite Reveals New Ancient Mineral. LiveScience. http://www.livescience.com/21197-allende-meteorite-panguite-mineral.html. Retrieved 2013-11-01.

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