Results 71 to 80 of about 11,040 (172)

A new CH carbonaceous chondrite from Acfer, Algeria [PDF]

, 2006
A single stone weighing 1456 g was found in November 2002 in the Acfer area, Algeria. Oxygen isotope, chondrules-matrix ratio as well as other petrographic features point to a classification as CH carbonaceous ...
Salvadori, A., Pratesi, G., Moggi-Cecchi, V., Greenwood, Richard, Franchi, Ian   +4 more
core   +4 more sources

Testing the Bus–DeMeo Asteroid Taxonomy Using Meteorite Spectra

The Planetary Science Journal
The most widely used method to spectrally classify asteroids is the Bus–DeMeo taxonomy. To test how well the Bus–DeMeo taxonomy groups asteroids on the basis of their mineralogy, we have classified ∼1500 meteorite spectra using this Bus–DeMeo system ...
Thomas H. Burbine, Iman Khanani, Deepika Kumawat, Ahlay Hussain, Sydney M. Wallace, M. Darby Dyar   +5 more
doaj   +1 more source

Rare Earth Element Potential in the Araí Rift Metavolcanic, Central Brazil: Gamma‐Ray Signatures, Mineralogy and Exploration Implications

Terra Nova, EarlyView.
ABSTRACT Although central Brazil hosts significant ion‐adsorption rare earth element (REE) deposits associated with A‐type granites, their coeval volcanic counterparts have been largely overlooked as exploration targets. This study demonstrates that acidic metavolcanic rocks of the Araí Group share strong radiometric, geochemical and mineralogical ...
Yuri Ribeiro, Nilson Francisquini Botelho, Valmir da Silva Souza, Diego Guilherme da Costa Gomes   +3 more
wiley   +1 more source

Looking for the origin of life in cosmochemistry: Asteroids and their carbon-rich meteorites

Mètode Science Studies Journal: Annual Review, 2016
Carbonaceous chondrite meteorites are carbon-containing fragments of primitive asteroids that have offered the only samples available to date giving insights into chemical evolution in laboratory analyses.
Sandra Pizzarello
doaj   +1 more source

Article re: Kelly chondrite

, 1973
Headline: "The Kelly Chondrite: A Parent Body Surface ...
Stöffler, Dieter, Bunch, T. E.
core  

Redistribution of Sr and rare earth elements in the matrices of CV3 carbonaceous chondrites during aqueous alteration in their parent body

Earth, Planets and Space, 2018
We measured the abundances of Sr and rare earth elements (REEs) in the matrices of five CV3 carbonaceous chondrites: Meteorite Hills (MET) 00430, MET 01070, La Paz ice field (LAP) 02206, Asuka (A) 881317 and Roberts Massif (RBT) 04143.
Kaori Jogo, Motoo Ito, Tomoki Nakamura, Sachio Kobayashi, Jong Ik Lee   +4 more
doaj   +1 more source

Early planetesimal differentiation and late accretion shaped Earth’s nitrogen budget

Nature Communications
The relative roles of protoplanetary differentiation versus late accretion in establishing Earth’s life-essential volatile element inventory are being hotly debated.
Wenzhong Wang, Michael J. Walter, John P. Brodholt, Shichun Huang   +3 more
doaj   +1 more source

Paper re: Mezo-Madaras chondrite

, 1967
Title: "Significance of Iron-Rich Silicates in the Mezo-Madaras ...
Dodd, Robert T., 1936-, Marvin, Ursula B., Van Schmus, W. R.   +2 more
core  

Mean atomic weight and grain density of Jezersko H4 chondrite [PDF]

, 2019
Mean atomic weight Amean of Jezersko (H4 S2(3) W2, find in 1992 in Slovenia) ordinary chondrite has been calculated using literature data on chemical composition of the meteorite (Miler et al.
Szurgot, Marian
core  

Geochemistry of the ungrouped carbonaceous chondrite Tagish Lake, the anomalous CM chondrite Bells, and comparison with CI and CM chondrites

, 2002
I have determined the composition via INAA of a bulk pristine sample of the Tagish Lake carbonaceous chondrite fall, along with bulk samples of the CI chondrite Orgueil and of several CM chondrites. Tagish Lake has a mean of refractory lithophile element/
unknown, unknown
core   +2 more sources