Results 131 to 140 of about 1,510 (199)

Distribution of extraterrestrial nucleobases, other N-heterocycles, and their precursors in a sample from asteroid Bennu. [PDF]

Commun Chem
Oba Y, Koga T, Takano Y, Naraoka H, Hirakawa Y, Sunami S, Furukawa Y, Yamazaki T, Tomaru T, Dworkin JP, Glavin DP, Connolly HC, Lauretta DS.   +12 more
europepmc   +1 more source

A high-resolution in situ X-ray diffraction study of mineral transitions due to post-hydration heating in CM chondrite meteorites. [PDF]

Earth Planets Space
Jenkins LE, King AJ, Lee MR, Daly L, Thompson SP, Day SJ, Saunders L, Martin PE, Bintang F.   +8 more
europepmc   +1 more source

Raman spectroscopic analysis of carbonates on a CY-type carbonaceous chondrite Yamato 980115: unexpectedly abundant terrestrial weathering products. [PDF]

Anal Sci
Urashima SH, Tsuchiya H, Imae N, Yamaguchi A, Yui H.   +4 more
europepmc   +1 more source

Triple oxygen isotopes of lunar water unveil indigenous and cometary heritage. [PDF]

Proc Natl Acad Sci U S A
Thiemens MM, Martinez MHN, Thiemens MH.
europepmc   +1 more source

Phase-specific nanoscale mechanics of anhydrous astromaterials and implications for larger-scale strength. [PDF]

npj Space Explor
Davis TP, Garvie LAJ, Hoover CG.
europepmc   +1 more source

In This Issue. [PDF]

Proc Natl Acad Sci U S A
europepmc   +1 more source

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The Bencubbin chondrite breccia and its relationship to CR chondrites and the ALH85085 chondrite

Meteoritics, 1990
Abstract— Bencubbin is an unclassified meteorite breccia which consists mainly of host silicate (∼40 vol.%) and host metal (∼60%) components. Rare (< 1%) ordinary chondrite clasts and a dark xenolith (formerly called a carbonaceous chondrite clast) are also found.
Michael K. Weisberg, Martin Prinz, Cherukupalli E. Nehru   +2 more
openaire   +1 more source

The compositional classification of chondrites: II The enstatite chondrite groups

Geochimica et Cosmochimica Acta, 1982
We present new data from a neutron activation analysis of four enstatite chondrites including the taxonomically important St. Sauveur, and discuss the classification of enstatite chondrites. The enstatite chondrites can be divided into two compositionally distinct sets; in one set abundances of nonrefractory siderophiles and moderately volatile ...
Derek W. Sears, Gregory W. Kallemeyn, John T. Wasson   +2 more
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The compositional classification of chondrites: III. Ungrouped carbonaceous chondrites

Geochimica et Cosmochimica Acta, 1982
Abstract Seven carbonaceous chondrites (Allan Hills A77307, Adelaide, Al Rais, Coolidge, Grosnaja, Karoonda and Renazzo) with uncertain classifications were analyzed by instrumental and radiochemical neutron activation analysis for 29 elements: Na, Mg, Al, K, Ca, Sc, V, Cr, Mn, Fe, Co, Ni, Zn, Ga, Ge, As, Se, Br, Ru, Cd, Sb, La, Sm, Eu, Yb, Lu, Os ...
Gregory W. Kallemeyn, John T. Wasson
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Feldspar in Chondrites

Science, 1965
Whereas most chondrites contain sodic plagioclase (or occasionally maskelynite, its glassy equivalent), a few are free of feldspar. Absence of plagioclase is correlated with the presence of calcium-poor clinopyroxene (pigeonite sensu lato ) instead of orthopyroxene.
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