Journal ArticleDOI
Timing of the Early Triassic carbon cycle perturbations inferred from new U–Pb ages and ammonoid biochronozones.
Thomas Galfetti,Hugo Bucher,Maria Ovtcharova,Urs Schaltegger,Arnaud Brayard,Thomas Brühwiler,Nicolas Goudemand,Helmut Weissert,Peter A. Hochuli,Fabrice Cordey,Kuang Guodun +10 more
TLDR
Based on analyses of single, thermally annealed and chemically abraded zircons, a new high-precision U-Pb age of 251.22± 0.20 Ma is established for a volcanic ash layer within the “Kashmirites densistriatus beds” of early Smithian age (Early Triassic) from the Luolou Formation (northwestern Guangxi, South China) as discussed by the authors.About:
This article is published in Earth and Planetary Science Letters.The article was published on 2007-06-30. It has received 250 citations till now. The article focuses on the topics: Early Triassic.read more
Citations
More filters
Journal ArticleDOI
Use of U–Pb ages of detrital zircons to infer maximum depositional ages of strata: A test against a Colorado Plateau Mesozoic database
TL;DR: In this paper, the authors compare the U-Pb ages of detrital zircons in 58 samples of Mesozoic sandstone from the Colorado Plateau and adjacent areas with depositional ages known independently from biostratigraphy.
Journal ArticleDOI
Lethally Hot Temperatures During the Early Triassic Greenhouse
Yadong Sun,Yadong Sun,Michael M. Joachimski,Paul B. Wignall,Chunbo Yan,Yanlong Chen,Haishui Jiang,Lina Wang,Xulong Lai +8 more
TL;DR: It is shown that the end-Permian mass extinction coincided with a rapid temperature rise to exceptionally high values in the Early Triassic that were inimical to life in equatorial latitudes and suppressed ecosystem recovery.
Journal ArticleDOI
The timing and pattern of biotic recovery following the end-Permian mass extinction
TL;DR: In the early Triassic period, Ammonoids and some other groups diversified rapidly, within 1-3 Myr, but extinctions continued through the Early Triassic, and a stable, complex ecosystem did not re-emerge until the beginning of the Middle Triassic 8-9 Myr after the crisis as discussed by the authors.
Journal ArticleDOI
Animal evolution, bioturbation, and the sulfate concentration of the oceans.
TL;DR: The evolution of bioturbation is linked to the significant deposition of sulfate evaporate minerals, which is largely a phenomena of the Phanerozoic, the last 542 million years and the time over which animals rose to prominence.
Journal ArticleDOI
Biogeochemical evidence for euxinic oceans and ecological disturbance presaging the end-Permian mass extinction event
TL;DR: In this article, the authors report secular trends in bulk isotopic parameters and lipid biomarkers in a core spanning 214 m of stratigraphic section across the PTB and through the entire Changhsingian interval, revealing distinct shifts in paleoenvironmental conditions and profound changes in plankton ecology well before and following the biological extinction event.
References
More filters
Journal ArticleDOI
Zircon U–Pb chemical abrasion (“CA-TIMS”) method: Combined annealing and multi-step partial dissolution analysis for improved precision and accuracy of zircon ages
TL;DR: CA-TIMS as discussed by the authors uses high-temperature treatment to anneal zircon lattice radiation damage from natural alpha, alpha recoil, and spontaneous fission processes; this annealing eliminates elemental and isotopic leaching effects that have limited earlier efforts at chemical leaching or multi-step step-wise dissolution or partial dissolution analysis (PDA)
Journal ArticleDOI
U-Pb ages from the neoproterozoic Doushantuo Formation, China
TL;DR: U-Pb zircon dates from volcanic ash beds within the Doushantuo Formation (China) indicate that its deposition occurred between 635 and 551 million years ago, indicating synchronous deglaciation.
Journal ArticleDOI
Pb diffusion in zircon
Daniele J. Cherniak,E. B. Watson +1 more
TL;DR: Watson et al. as mentioned in this paper measured chemical diffusion of Ti under anhydrous conditions at 1-atm and under fluid-present elevated pressure (1.1-1.2 GPa) conditions in natural zircon.
Journal ArticleDOI
Large Perturbations of the Carbon Cycle During Recovery from the End-Permian Extinction
Jonathan L. Payne,Daniel J. Lehrmann,Jiayong Wei,Michael J. Orchard,Daniel P. Schrag,Andrew H. Knoll +5 more
TL;DR: High-resolution carbon isotope measurements of multiple stratigraphic sections in south China demonstrate that the pronounced carbon isotopic excursion at the Permian-Triassic boundary was not an isolated event but the first in a series of large fluctuations that continued throughout the Early Triassic before ending abruptly early in the Middle Triassic.