Impact Event at the Permian-Triassic Boundary: Evidence from Extraterrestrial Noble Gases in Fullerenes

  title={Impact Event at the Permian-Triassic Boundary: Evidence from Extraterrestrial Noble Gases in Fullerenes},
  author={Luann Becker and Robert J. Poreda and A. G. Hunt and Theodore E. Bunch and Michael R. Rampino},
  pages={1530 - 1533}
The Permian-Triassic boundary (PTB) event, which occurred about 251.4 million years ago, is marked by the most severe mass extinction in the geologic record. Recent studies of some PTB sites indicate that the extinctions occurred very abruptly, consistent with a catastrophic, possibly extraterrestrial, cause. Fullerenes (C60 to C200) from sediments at the PTB contain trapped helium and argon with isotope ratios similar to the planetary component of carbonaceous chondrites. These data imply that… 

Enhanced flux of extraterrestrial 3He across the Permian–Triassic boundary

AbstractThe ca 252 Ma Permian–Triassic boundary (PTB) represents the most severe mass extinction event of the Phanerozoic, with the disappearance of ~ 80% of marine invertebrate species. Large-scale

End-Permian catastrophe by a bolide impact: Evidence of a gigantic release of sulfur from the mantle

Our studies in southern China have revealed a remarkable sulfur and strontium isotope excursion at the end of the Permian, along with a coincident concentration of impact- metamorphosed grains and

Chondritic Meteorite Fragments Associated with the Permian-Triassic Boundary in Antarctica

In one sample, the meteoritic fragments are accompanied by more abundant discrete metal grains, which are also found in an end-Permian bed at Meishan, southern China, and the implications for a suggested global impact event at the Permian-Triassic boundary are discussed.

Evidence of Impact at the Permian/Triassic Boundary from Mössbauer Spectroscopy

Sediment samples from Spiti valley, India, deposited about 250 Million years ago during the Permian-Triassic transition, have been analysed. 57Fe Mössbauer spectroscopic studies show that iron occurs

Fullerenes and interplanetary dust at the Permian-Triassic boundary.

The helium and neon isotopic compositions for both the bulk Graphite Peak sediment and an isolated magnetic fraction from the bulk material are consistent with solar-type gases measured in zero-age deep-sea sediments and point to a common source, namely, the flux of IDPs to the Earth's surface.

Abrupt chemical weathering increase across the Permian-Triassic boundary

An extraterrestrial impact at the Permian-Triassic boundary?

Here, it is reported that the authors are able to detect fullerene-hosted extraterrestrial ^(3)He neither in aliquots of the same Meishan material analyzed by Beckeret al., nor any in samples of a second Chinese PTB section, and that they thus find no evidence for an impact.



Geochemical evidence for a comet shower in the late Eocene.

Observations provide evidence for a comet shower triggered by an impulsive perturbation of the Oort cloud, indicating that the abundance of Earth-crossing objects and dustiness in the inner solar system were simultaneously but only briefly enhanced.

U/Pb zircon geochronology and tempo of the end-permian mass extinction

Biostratigraphic controls from strata intercalated with ash beds below the boundary indicate that the Changhsingian pulse of the end-Permian extinction, corresponding to the disappearance of about 85 percent of marine species, lasted less than 1 million years.

Comparative Earth History and Late Permian Mass Extinction

The repeated association during the late Neoproterozoic Era of large carbon-isotopic excursions, continental glaciation, and stratigraphically anomalous carbonate precipitation provides a framework

Synchrony and Causal Relations Between Permian-Triassic Boundary Crises and Siberian Flood Volcanism

Analysis of 40Ar/39Ar data from two tuffs in southern China yielded a date comparable to the inception of main stage Siberian flood volcanism at 250.0 � 0.2 million years ago for the Permian-Triassic boundary.

The Permo–Triassic extinction

  • D. Erwin
  • Geography, Environmental Science
  • 1994
The end-Permian mass extinction brought the Palaeozoic great experiment in marine life to a close during an interval of intense climatic, tectonic and geochemical change. Improved knowledge of latest

Cenozoic variations in the flux of interplanetary dust recorded by3He in a deep-sea sediment

HELIUM-S concentrations and 3He/4He ratios in modern pelagic sediments are known to be far in excess of terrestrial values as a result of micrometeorite fallout1–3. Here I report that

Tempo of the end-Permian event: High-resolution cyclostratigraphy at the Permian-Triassic boundary

The Permian-Triassic (P-T) boundary is marked by the most severe mass extinction in the geologic record. High-resolution cyclostratigraphy on a 10 4 yr scale across the P-T boundary in a core from

Search for evidence of impact at the Permian-Triassic boundary in Antarctica and Australia

Life on Earth was almost destroyed some 250 m.y. ago in the most profound of all known mass extinction events. We investigated the possible role of impact by an extraterrestrial bolide through

Fullerenes found in the Permo‐Triassic mass extinction period

Fullerenes have been identified by high‐performance liquid chromatography with UV‐visible spectroscopic analysis of toluene extracts of deep sea claystones from Permo‐Triassic (P/T) boundary sections

Pattern of marine mass extinction near the Permian-Triassic boundary in South China.

A statistical analysis of the occurrences of 162 genera and 333 species confirms a sudden extinction event at 251.4 million years ago, coincident with a dramatic depletion of delta13C(carbonate) and an increase in microspherules.