Exposure history of individual cosmic particles
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Cited by (36)
Characterization of the organic matter and hydration state of Antarctic micrometeorites: A reservoir distinct from carbonaceous chondrites
2018, IcarusCitation Excerpt :According to theoretical calculations, a 200 µm chondritic particle (density ∼ 2 g cm−3) has a spiraling orbit that lasts for ∼ 5×106 years (Robertson, 1937). Estimations of space exposure ages provide consistent values ranging between 105 to 107 years (Nishiizumi et al., 1991). These ages should be however considered as upper limits, as they might include the exposure at the surface of the planetary body as well.
Factors affecting production rates of cosmogenic nuclides in extraterrestrial matter
2015, Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and AtomsNew estimates of the production of volatile gases from ablating carbonaceous micrometeoroids at Earth and Mars during an E-belt-type Late Heavy Bombardment
2014, Geochimica et Cosmochimica ActaCitation Excerpt :These are (a) the different dynamics of micrometeoroids and asteroids; (b) the varying efficiency of production of dust from asteroids of different compositions and (c) the nature of the micrometeoroid flux at Earth. Firstly, the dynamics of micrometeoroids in interplanetary space are dominated by non-gravitational forces such as Poynting-Robertson drag, with micrometeoroids typically taking around 100–1000 kyr to reach Earth from the asteroid belt (Burns et al., 1979; Nishiizumi et al., 1991; Meier et al., 2014). In contrast, larger meteoroids are controlled by interactions with resonances and gravitational focusing (Vokrouhlicky and Farinella, 2000).
Cosmic-ray exposure ages of fossil micrometeorites from mid-Ordovician sediments at Lynna River, Russia
2014, Geochimica et Cosmochimica ActaCitation Excerpt :This is the first time that such low and well-resolved CRE ages have been determined in SEC grains/fossil micrometeorites. The CRE ages are still lower than the lowest (resolved) 21Ne GCR + SCR exposure ages determined for recent micrometeorites (∼0.4–1.0 Ma; Olinger et al., 1990), and similar to the shortest 10Be/26Al-based SCR + GCR exposure ages measured in antarctic micrometeorites by Nishiizumi et al. (1991). Since SEC grains are much more abundant, and thus easier to find, than fossil meteorites, this finding opens up the possibility of precisely correlating, on a worldwide basis, beds deposited in the few million years after the break-up of the L chondrite parent body asteroid.
Cosmic-Ray Exposure Ages of Meteorites
2013, Treatise on Geochemistry: Second EditionMicrometeorite precursors: Clues from the mineralogy and petrology of their relict minerals
2013, Geochimica et Cosmochimica ActaCitation Excerpt :Micrometeorites (MMs) are small extraterrestrial particles, ∼30–2000 μm in size, collected from the Earth’s surface (e.g., Maurette et al., 1991; Brownlee et al., 1997; Taylor et al., 1998, 2011). These are known to have been small bodies in space because of the high abundance of elements generated by cosmic rays on their surfaces (e.g., Raisbeck and Yiou, 1987; Nishiizumi et al., 1991; Osawa et al., 2000). MMs have been collected from many environments but those collected from polar snow and ice have undergone the least amount of terrestrial altertion and some have retained their original mineralogy.