The flux of meteorites to the Earth over the last 50 000 years

Bland, P. A.; Smith, Thomas; Jull, A. J. T.; Berry, Frank J.; Bevan, A. W. R.; Cloudt, S.; Pillinger, C. T.

doi:10.1093/mnras/283.2.551

Cited by 132 publications

(113 citation statements)

References 0 publications

Supporting

Mentioning

106

Contrasting

Order By: Relevance

“…The accretion of cosmic material might seem at first a reasonable hypothesis for planetary mass growth. All bodies in the solar system formed by the aggregation of gas and dust in the primitive solar nebula, and extraterrestrial material is constantly falling on Earth (Bland et al, 1996;PeuckerEhrenbrink, 1996;Karner et al, 2003;Yada et al, 2004;Zolensky, 2006), sometimes with very dramatic effects (Alvarez et al, 1980;French, 1998;Chapman, 2004). However, during the formation of the solar system, the growing planets cleaned their orbits of residual material and, when the Sun reached the necessary mass to trigger nuclear fusion reactions, the solar wind expelled what remained of the original cloud (Taylor, 2001;Righter and O'Brien, 2011).…”

Section: P Sudiro: the Earth Expansion Theorymentioning

confidence: 99%

The Earth expansion theory and its transition from scientific hypothesis to pseudoscientific belief

Sudiro

2014

Hist. Geo Space. Sci.

View full text Add to dashboard Cite

Abstract. During the first half of 20th century, the dominant global tectonics model based on Earth contraction had increasing problems accommodating new geological evidence, with the result that alternative geodynamic theories were investigated. Due to the level of scientific knowledge and the limited amount of data available in many scientific disciplines at the time, not only was contractionism considered a valid scientific theory but the debate also included expansionism, mobilism on a fixed-dimension planet, or various combinations of these geodynamic hypotheses. Geologists and physicists generally accepted that planets could change their dimensions, although the change of volume was generally believed to happen because of a contraction, not an expansion.

show abstract

Section: P Sudiro: the Earth Expansion Theorymentioning

confidence: 99%

The Earth expansion theory and its transition from scientific hypothesis to pseudoscientific belief

Sudiro

2014

Hist. Geo Space. Sci.

View full text Add to dashboard Cite

show abstract

“…Wlotzka et al 1995) had used a petrographic weathering estimate, however, Bland et al (1998) introduced the idea of using Mössbauer spectroscopy, where the relative amounts of Fe in different valence states could be measured. Bland et al (1996) further showed that meteorites of different composition weather at different rates, a fact known qualitatively to many meteoriticists, but difficult to quantify. Mössbauer provides that quantitation, and Bland et al (1996) showed that H chondrites, which contain more metallic iron, weather at faster rates than L chondrites.…”

Section: Desert Meteoritesmentioning

confidence: 99%

“…If the high pairing were the case, any estimates of infall rates would be too high, as our calculations of infall rates rely on an estimate of the total number of meteorites collected in our to scale our observed age distributions to the whole population. We can compare the estimates of infall rate from different areas and the results summarized by Bland et al (1996) in Table 5. Here we can see that the estimates from Allan Hills are not in disagreement with other estimates.…”

Section: Antarctic Meteoritesmentioning

confidence: 99%

Radiocarbon Beyond this World

et al. 2000

View full text Add to dashboard Cite

ABSTRACT. In this paper, we review the production of radiocarbon and other radionuclides in extraterrestrial materials. This radioactivity can be produced by the effects of solar and galactic cosmic rays on solid material in space. In addition, direct implantation at the lunar surface of 14 C and other radionuclides can occur. The level of 14 C and other radionuclides in a meteorite can be used to determine its residence time on the Earth's surface, or "terrestrial age". 14 C provides the best tool for estimating terrestrial ages of meteorites collected in desert environments. Age control allows us to understand the time constraints on processes by which meteorites are weathered, as well as mean storage times. Third, we discuss the use of the difference in 14 C/ 12 C ratio of organic material and carbonates produced on other planetary objects and terrestrial material. These differences can be used to assess the importance of distinguishing primary material formed on the parent body from secondary alteration of meteoritic material after it lands on the earth.

show abstract

“…They have been used to estimate the meteorite accretion rate (e.g., Bland et al 1996a), identify multiple fragments of single preatmospheric bodies (Benoit et al 2000), assess the role and rate of weathering processes (Bland et al 1996b), understand meteorite concentration mechanisms (e.g., Zolensky et al 1990), and constrain the environmental and geological history of the locations where they are found Folco et al 2006). A recent review of meteorite terrestrial ages and their significance is given by Jull (2006).…”

Section: Introductionmentioning

confidence: 99%

The 410,000 year terrestrial age of eucrite Río Cuarto 001

Levine

Arazi

Niello

et al. 2008

Meteorit & Planetary Scien

View full text Add to dashboard Cite

Abstract-We have measured a surprisingly long terrestrial age of yr ( ka) for basaltic eucrite Río Cuarto 001 using accelerator mass spectrometry of 26 Al, 36 Cl, and 41 Ca. Though many meteorites are known to have survived for tens or hundreds of ka in Antarctica or hot deserts, the mean annual precipitation of 815 mm in Río Cuarto, Cordoba Province, Argentina, makes the long survival of this meteorite remarkable. We propose two explanations for the exceptional preservation of Río Cuarto 001. First, the meteorite contains only trace amounts of metal, so the weathering and oxidation of metallic Fe, which commonly destroys chondrites, is ineffective in this case.

show abstract

The flux of meteorites to the Earth over the last 50 000 years

Cited by 132 publications

References 0 publications

The Earth expansion theory and its transition from scientific hypothesis to pseudoscientific belief

The Earth expansion theory and its transition from scientific hypothesis to pseudoscientific belief

Radiocarbon Beyond this World

The 410,000 year terrestrial age of eucrite Río Cuarto 001

Contact Info

Product

Resources

About