Fast delivery of meteorites to Earth after a major asteroid collision

  title={Fast delivery of meteorites to Earth after a major asteroid collision},
  author={Philipp R. Heck and Birger Schmitz and Heinrich Baur and Alex N. Halliday and Rainer Wieler},
Very large collisions in the asteroid belt could lead temporarily to a substantial increase in the rate of impacts of meteorites on Earth. Orbital simulations predict that fragments from such events may arrive considerably faster than the typical transit times of meteorites falling today, because in some large impacts part of the debris is transferred directly into a resonant orbit with Jupiter. Such an efficient meteorite delivery track, however, has not been verified. Here we report high… 

Asteroidal source of L chondrite meteorites

Microanalysis of Fossil Micrometeorites and Meteorites to Study A Major Asteroid Collision ~470 Million Years Ago

Collisions of small bodies and their fragments among themselves and with terrestrial planets are among the most dominant processes in the evolution of our Solar System. Much of the knowledge of this

Low-Temperature Thermochronometry of Meteorites

Timing of accretion of the primary planetesimals in the early solar system has been investigated using short-lived (e.g., 26Al, 53Mn, 182Hf and 129I) and long-lived (e.g., 238U, 235U, 232Th and

Rare meteorites common in the Ordovician period

Most meteorites that fall today are H and L type ordinary chondrites, yet the main belt asteroids best positioned to deliver meteorites are LL chondrites1,2. This suggests that the current meteorite

Origin of fossil meteorites from Ordovician limestone in Sweden

  • V. Alexeev
  • Geology, Physics
    Geochemistry International
  • 2012
Based on the analysis of data in [1, 2] on the concentrations of noble gases and the cosmic ray exposure age (CREA) of chromite grains in fossil meteorites, it was demonstrated in [3] that the

Asteroid shower on the Earth-Moon system immediately before the Cryogenian period revealed by KAGUYA

The authors study impact craters on the Moon with ages up to 800 million years ago and present a cross correlation to Earth, linking up to mass extinction events throughout Earth’s history.

Very low strengths of interplanetary meteoroids and small asteroids

Abstract– We have assembled data on 13 cases of meteorite falls with accurate tracking data on atmospheric passage. In all cases, we estimate the bulk strength of the object corresponding to its

Refined Ordovician timescale reveals no link between asteroid breakup and biodiversification

This study reports a zircon U-Pb date of 467.50±0.28 Ma from a distinct bed within the meteorite-bearing interval of southern Sweden that, combined with published cosmic-ray exposure ages of co-occurring meteoritic material, provides a precise age for the L chondrite breakup at 468.0± 0.3‬Ma.



Orbital and temporal distributions of meteorites originating in the asteroid belt

Abstract— The recent discovery of the importance of Sun‐grazing phenomena dramatically changed our understanding of the dynamics of objects emerging from the asteroid belt via resonant phenomena. The

Delivery of Material from the Asteroid Belt

The delivery of bodies from the main asteroid belt to Earth-crossing orbits requires a complex scenario that involves disruptive asteroidal collisions as well as gravitational and non-gravitational

Cosmic-Ray-Produced Noble Gases in Meteorites

Energetic particles of the galactic cosmic radiation (GCR) have a mean penetration depth in rock of about 50 cm, comparable to the typical size of a meteorite. GCR-induced effects therefore provide a

Catastrophic fragmentation of asteroids: evidence from meteorites


The exposure age histograms for H-, L-, and LL-chondrites are discussed. None of these histograms is consistent with a continuous delivery of asteroidal material to the earth, as the observed T(e)

The production of cosmogenic nuclides in stony meteoroids by galactic cosmic‐ray particles

Abstract— We present a purely physical model for the calculation of depth‐ and size‐dependent production rates of cosmogenic nuclides by galactic cosmic‐ray (GCR) particles. besides the spectra of

Sediment-Dispersed Extraterrestrial Chromite Traces a Major Asteroid Disruption Event

Extraterrestrial chromite grains in mid-Ordovician limestone can be used to constrain in detail the temporal variations in flux of extraterrestrial matter after one of the largest asteroid disruption events in the asteroid belt in late solar-system history.

Impact ages of meteorites: A synthesis

— Isotopic ages of meteorites that indicate chronometer resetting due to impact heating are summarized. Most of the ages were obtained by the 39Ar-40Ar technique, but several Rb-Sr, Pb-Pb, and Sm-Nd

Debiased Orbital and Absolute Magnitude Distribution of the Near-Earth Objects

The orbital and absolute magnitude distribution of the near-Earth objects (NEOs) is difficult to compute, partly because only a modest fraction of the entire NEO population has been discovered so