TY - JOUR
T1 - Photic zone euxinia during the Permian-Triassic superanoxic event
AU - Grice, Kliti
AU - Cao, Changqun
AU - Love, Gordon D.
AU - Böttcher, Michael E.
AU - Twitchett, Richard J.
AU - Grosjean, Emmanuelle
AU - Summons, Roger E.
AU - Turgeon, Steven C.
AU - Dunning, William
AU - Jin, Yugan
PY - 2005/2/4
Y1 - 2005/2/4
N2 - Carbon and sulfur isotopic data, together with biomarker and iron speciation analyses of the Hovea-3 core that was drilled in the Perth Basin, Western Australia, indicate that euxinic conditions prevailed in the paleowater column during the Permian-Triassic superanoxic event. Biomarkers diagnostic for anoxygenic photosynthesis by Chlorobiaceae are particularly abundant at the boundary and into the Early Triassic. Similar conditions prevailed in the contemporaneous seas off South China. Our evidence for widespread photic-zone euxinic conditions suggests that sulfide toxicity was a driver of the extinction and a factor in the protracted recovery.
AB - Carbon and sulfur isotopic data, together with biomarker and iron speciation analyses of the Hovea-3 core that was drilled in the Perth Basin, Western Australia, indicate that euxinic conditions prevailed in the paleowater column during the Permian-Triassic superanoxic event. Biomarkers diagnostic for anoxygenic photosynthesis by Chlorobiaceae are particularly abundant at the boundary and into the Early Triassic. Similar conditions prevailed in the contemporaneous seas off South China. Our evidence for widespread photic-zone euxinic conditions suggests that sulfide toxicity was a driver of the extinction and a factor in the protracted recovery.
UR - http://www.scopus.com/inward/record.url?scp=19944431675&partnerID=8YFLogxK
U2 - 10.1126/science.1104323
DO - 10.1126/science.1104323
M3 - Article
C2 - 15661975
AN - SCOPUS:19944431675
VL - 307
SP - 706
EP - 709
JO - Science (New York, N.Y.)
JF - Science (New York, N.Y.)
SN - 0036-8075
IS - 5710
ER -