Spatial variation in sediment fluxes, redox conditions, and productivity in the Permian-Triassic Panthalassic Ocean

Thomas J. Algeo, Kiyoko Kuwahara, Hiroyoshi Sano, Steven Bates, Timothy Lyons, Erika Elswick, Linda Hinnov, Brooks Ellwood, Jessa Moser, J. Barry Maynard

Research output: Contribution to journalArticle

152 Citations (Scopus)

Abstract

Two Permian/Triassic boundary sections in central Japan provide a rare window into environmental conditions within the Panthalassic Ocean, which encompassed more than half the Earth's surface at 252. Ma. Integration of petrographic, geochemical, and time series data provides new insights regarding the fluxes of major and trace components to the sediment as well as environmental conditions in both the deep and intermediate water masses at each study site. The Ubara section was located in a high-productivity peri-equatorial location, whereas the Gujo-Hachiman section was located in a moderate-productivity location at some distance from the paleoequator. An upward transition from gray organic-poor cherts to black siliceous mudstones at both sites occurred in conjunction with increased primary productivity, intensified euxinia within the oxygen-minimum zone (OMZ), and decimation of the radiolarian zooplankton community. Euxinia in the OMZ of the equatorial Panthalassic Ocean developed episodically for a ~. 200-250. kyr interval during the Late Permian, followed by an abrupt intensification and lateral expansion of the OMZ around the Permian-Triassic boundary. Throughout the study interval, bottom waters at both sites remained mostly suboxic, a finding that counters hypotheses of development of a "superanoxic" Permo-Triassic deep ocean as a consequence of stagnation of oceanic overturning circulation.

Original languageEnglish
Pages (from-to)65-83
Number of pages19
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
Volume308
Issue number1-2
DOIs
Publication statusPublished - Jul 15 2011

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redox conditions
spatial variation
Permian-Triassic boundary
Permian
Triassic
oceans
oxygen
productivity
sediments
ocean
environmental conditions
sediment
mudstone
oceanic circulation
environmental factors
intermediate water
bottom water
primary productivity
time series analysis
zooplankton

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Ecology, Evolution, Behavior and Systematics
  • Earth-Surface Processes
  • Palaeontology

Cite this

Spatial variation in sediment fluxes, redox conditions, and productivity in the Permian-Triassic Panthalassic Ocean. / Algeo, Thomas J.; Kuwahara, Kiyoko; Sano, Hiroyoshi; Bates, Steven; Lyons, Timothy; Elswick, Erika; Hinnov, Linda; Ellwood, Brooks; Moser, Jessa; Maynard, J. Barry.

In: Palaeogeography, Palaeoclimatology, Palaeoecology, Vol. 308, No. 1-2, 15.07.2011, p. 65-83.

Research output: Contribution to journalArticle

Algeo, TJ, Kuwahara, K, Sano, H, Bates, S, Lyons, T, Elswick, E, Hinnov, L, Ellwood, B, Moser, J & Maynard, JB 2011, 'Spatial variation in sediment fluxes, redox conditions, and productivity in the Permian-Triassic Panthalassic Ocean', Palaeogeography, Palaeoclimatology, Palaeoecology, vol. 308, no. 1-2, pp. 65-83. https://doi.org/10.1016/j.palaeo.2010.07.007
Algeo, Thomas J. ; Kuwahara, Kiyoko ; Sano, Hiroyoshi ; Bates, Steven ; Lyons, Timothy ; Elswick, Erika ; Hinnov, Linda ; Ellwood, Brooks ; Moser, Jessa ; Maynard, J. Barry. / Spatial variation in sediment fluxes, redox conditions, and productivity in the Permian-Triassic Panthalassic Ocean. In: Palaeogeography, Palaeoclimatology, Palaeoecology. 2011 ; Vol. 308, No. 1-2. pp. 65-83.
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