Results 51 to 60 of about 32,577 (247)

D/H ratios of the inner Solar System [PDF]

, 2017
The original hydrogen isotope (D/H) ratios of different planetary bodies may indicate where each body formed in the Solar System. However, geological and atmospheric processes can alter these ratios through time.
Hallis, Lydia
core   +1 more source

Rapid terrestrial weathering of the CI1 carbonaceous chondrite find Oued Chebeika 002

Meteoritics &Planetary Science, EarlyView.
Abstract Alteration of historic CI1 meteorite falls during their curation demonstrates the susceptibility of smectite‐rich carbonaceous chondrites to terrestrial exposure. The discovery of Oued Chebeika 002 in Morocco in June 2024 presents a unique opportunity to document the earliest stages of weathering of a CI1 find.
Martin R. Lee, Jasper Glazer
wiley   +1 more source

Mineralogy and geochemistry of rare earth elements in the Moyil Valley alteration zones, Meshkinshahr (northwest Iran)

Geologos, 2020
Sabalan Mountain (northwest Iran) witnessed intense volcanic activity during the Cenozoic (Plio-Pleistocene). The result of this manifests itself in the conical geometry of the Sabalan stratovolcano and ahigh hydrothermal gradient around it, which can be
Naseri Hossain, Jamadi Mahnaz, Radmard Kaikhosrov, Alavi Ghafour   +3 more
doaj   +1 more source

Identification of Magnetite in B-type Asteroids

, 2010
Spectrally blue (B-type) asteroids are rare, with the second discovered asteroid Pallas being the largest and most famous example. We conducted a focused, infrared spectroscopic survey of B-type asteroids to search for water-related features in these ...
Adams, Bin Yang, Binzel, Brearley, Bus, Campins, Campins, Clark, Cunningham, David Jewitt, Fernàndez, Gaffey, Green, Hiroi, Hsieh, Hyman, Jewitt, Jewitt, Jewitt, Kasuga, Kojima, Licandro, Mason, McKinley, McSween, Ohtsuka, Rivkin, Tedesco, Tholen, Whipple, Yang, Yang, Zolensky   +32 more
core   +1 more source

New evidence on the formation conditions of the Libyan Desert Glass (Western Egypt): Clues from a dendritic zircon inclusion

Meteoritics &Planetary Science, EarlyView.
Abstract Libyan Desert Glass (LDG) is an ~29 million years old, silica‐rich glass found in Western Egypt. Whether this glass formed in an impact cratering context associated with the hypervelocity collision of a cometary/asteroidal body or radiative heating during an airburst is debated. Determination of the formation temperatures and pressures of rare
Niccolò Magnani, Enrico Mugnaioli, Sofia Lorenzon, Lidia Pittarello, Tatiana E. Gorelik, Matteo Masotta, Luigi Folco   +6 more
wiley   +1 more source

An asteroidal origin for water in the Moon

Nature Communications, 2016
Recent samples have shown that the Moon's interior, previously thought to be anhydrous, contains water, yet how this water was delivered is unclear. Here, using isotopic analyses and modelling, Barnes et al.
Jessica J. Barnes, David A. Kring, Romain Tartèse, Ian A. Franchi, Mahesh Anand, Sara S. Russell   +5 more
doaj   +1 more source

Oxygen isotopic and petrological constraints on the origin and relationship of IIE iron meteorites and H chondrites [PDF]

, 2011
New oxygen isotopic measurements of IIEs and H chondrites are indistinguishable — strengthening a possible common origin for these groups.
Anand, M., Franchi, I. A., Greenwood, R. C., Mcdermott, K., Scott, E. R. D.   +4 more
core  

A mutli-technique search for the most primitive CO chondrites [PDF]

, 2018
As part of a study to identify the most primitive COs and to look for weakly altered CMs amongst the COs, we have conducted a multi-technique study of 16 Antarctic meteorites that had been classified as primitive COs. For this study, we have determined: (
Alexander, Alexander, Alexander, Alexander, Alexander, Alexander, Alexander, Alexander, Bao, Beaudoin, Bland, Bonal, Brearley, Burton, Busemann, C.M.O'D. Alexander, Chizmadia, Choi, Clayton, Cody, Cressey, Davidson, Davidson, Doyle, Dunn, Greenwood, Greenwood, Greenwood, Greenwood, Grossman, Hallis, Hewins, Howard, Howard, Howard, I.A. Franchi, J.M. Gibson, Jarosewich, K.T. Howard, King, Le Guillou, Lee, Madsen, Menzies, Miller, Nguyen, Nguyen, Nguyen, Nittler, Quirico, R. Bowden, R.C. Greenwood, Sakamoto, Savin, Schrader, Schrader, Schultz, Seto, Sheppard, Smith, Starkey, Tenner, Ushikubo, Ushikubo, Vollmer, Yan, Young, Young, Zheng   +68 more
core   +1 more source

The effect of early diagenetic processes on the quantification of fossil micrometeorite abundance and flux in the geological record

Meteoritics &Planetary Science, EarlyView.
Abstract Fossil micrometeorites (MMs) recovered from lithified sedimentary rocks, particularly iron‐rich (I‐type) cosmic spherules (CSs) provide valuable insights into past dust‐forming events. Their abundances, when combined with estimates of local sedimentation rates can be used to reconstruct the flux of extraterrestrial dust.
Isabelle S. Mattia, Matthew J. Genge, Martin D. Suttle   +2 more
wiley   +1 more source

Young asteroidal fluid activity revealed by absolute age from apatite in carbonaceous chondrite

Nature Communications, 2016
Chondritic meteorites formed in the early solar system and may tell us about primary processes at that time. Here, Zhang et al. report an absolute 207Pb/206Pb isochron age (4,450±50 Ma) of apatite from a carbonaceous chondrite constraining timing of ...
Ai-Cheng Zhang, Qiu-Li Li, Hisayoshi Yurimoto, Naoya Sakamoto, Xian-Hua Li, Sen Hu, Yang-Ting Lin, Ru-Cheng Wang   +7 more
doaj   +1 more source