A unique geochemical record at the Permian/Triassic boundary

  title={A unique geochemical record at the Permian/Triassic boundary},
  author={William T. Holser and Hans Peter Sch{\"o}nlaub and M. Jr. Attrep and Klaus Boeckelmann and Peter Klein and Mordeckai Magaritz and Charles J. Orth and Alois Fenninger and Catherine Jenny and Martin Kr{\'a}lik and Hermann Johann Mauritsch and Edwin Pak and J.-M. Schramm and Karl Stattegger and Rupert Schm{\"o}ller},
A 330-metre core drilled through the marine Permian/Triassic boundary in the Carnic Alps of Austria allows closely correlated studies of geochemistry, petrography and palaeontology across the boundary. The isotope shifts and metal concentrations are extended, multiple and complex, and do not resemble those seen at the Cretaceous/Tertiary boundary. Both the carbon isotope shifts and the chemical events (including an indium anomaly) may have causes related to a major regression of the sea. 
Carbon and Sulfur Isotope Stratigraphy of the Permian and Adjacent Intervals
The Permian was a most unusual period in geologic history. It was marked by repeated largescale climate changes, major extinction events, abrupt and extensive volcanic activity (the Siberian traps),
Geochemical changes at the Permian–Triassic transition in Southern Alps and adjacent area: a review
Compilation of the recent literature from the Southern Alps and adjacent area confirms the geochemical variations of unusual amplitudes during the Permian-Triassic boundary interval (PTBI). A great
Permo-Triassic Boundary Superanoxia and Stratified Superocean: Records from Lost Deep Sea
  • Isozaki
  • Environmental Science, Geography
  • 1997
The symmetry in lithostratigraphy and redox condition of the boundary sections suggest that the superocean Panthalassa became totally stratified for nearly 20 million years across the Permo-Triassic boundary.
The Permian-Triassic of the Gartnerkofel-1 Core (Carnic Alps, Austria): Sulfur Isotopes
Sulfur isotope ratios in pyrite have high negative values characteristic of each level, confirming a syngenetic origin of the sulfide. Two samples of gypsum have high negative values corresponding to
Geochemistry of the end-Permian extinction event in Austria and Italy: No evidence for an extraterrestrial component
The end-Permian mass extinction (251 Ma) was the largest in Earth's history, and the great extent of biospheric perturbation is recorded as dramatic shifts in carbon isotope ratios of sedimentary


An extraterrestrial event at the Cretaceous–Tertiary boundary
Closely spaced samples from an uninterrupted calcareous pelagic sequence across the Cretaceous–Tertiary boundary reveal that the extinction of planktonic Foraminifera and nannofossils was abrupt
The carbon-isotope shift at the Permian/Triassic boundary in the southern Alps is gradual
Carbon isotope ratios in marine carbonate rocks have been shown to shift at some of the time boundaries associated with extinction events; for example, Cretaceous/Tertiary1 and Ordovician/ Silurian2.
Siderophile-enriched sediments from the Cretaceous–Tertiary boundary
Siderophilic element concentrations are high in sediments from the Cretaceous–Tertiary boundary. An extraterrestrial source is indicated. Concentrations are too high to be understood in terms of the
Carbon-isotope events across the Precambrian/Cambrian boundary on the Siberian Platform
Variations of marine isotopes with time have been observed through the Phanerozoic1,2, in association with some period boundaries: Pleistocene/Holocene3, Cretaceous/Tertiary4, Permo-Triassic5,6 and
Conodont Survival and Low Iridium Abundances Across the Permian-Triassic Boundary in South China
A low concentration of iridium in the boundary clay (0.002 part per billion �20 percent) and in samples immediately below and above, do not support the proposal of an extraterrestrial impact event at this boundary in China.
Terminal Ordovician extinction: Geochemical analysis of the Ordovician/Silurian boundary, Anticosti Island, Quebec
Elemental abundances (including Ir), carbon and oxygen ratios in carbonates, mineral content, and thin sections have been measured in samples collected across the conodont-defined Ordovician/Silurian
The Cretaceous/Tertiary boundary carbon and oxygen isotope stratigraphy, diagenesis, and paleoceanography at Zumaya, Spain
Carbon and oxygen isotope analysis of 240 m of Upper Cretaceous and Lower Tertiary limestones and marlstones from Zumaya, Spain, has revealed three distinct, negative carbon isotope excursions of up
Seawater Strontium Isotopes, Acid Rain, and the Cretaceous-Tertiary Boundary
A large bolide impact at the end of the Cretaceous would have produced significant amounts of nitrogen oxides by shock heating of the atmosphere. The resulting acid precipitation would have increased
Chronology of Fluctuating Sea Levels Since the Triassic
An effort has been made to develop a realistic and accurate time scale and widely applicablechronostratigraphy and to integrate depositional sequences documented in public domain outcrop sections from various basins with this chronostratigraphic framework.
Significance of a δ13C anomaly near the Devonian/Carboniferous boundary at the Muhua section, South China
The Muhua section of Guizhou Province, South China is one of three candidates for the Devonian/Carboniferous international boundary stratotype1. Although palaeontological and stratigraphical data