(super 87) Sr/ (super 86) Sr stratigraphy from the Early Triassic of Zal, Iran; linking temperature to weathering rates and the tempo of ecosystem recovery

Recovery from the Late Permian mass extinction was slowed by continued environmental perturbations during the Early Triassic. Rapid fluctuations of the Early Triassic marine carbonate carbon isotope record indicate instability in the global carbon cycle, and recent delta (super 18) O (sub apatite) studies link elevated temperatures to the prolonged biotic recovery. High temperatures potentially caused enhanced continental weathering that was detrimental to marine ecosystems, but linking weathering rates to temperature has proven difficult. One proxy for weathering is the (super 87) Sr/ (super 86) Sr of marine carbonate; we present here an (super 87) Sr/ (super 86) Sr record from an upper Permian-lower Triassic succession near Zal, Iran, that is coupled to a delta (super 13) C (sub carbonate) record. An increase in the rate of (super 87) Sr/ (super 86) Sr rise from the Dienerian to the Smithian may be linked to elevated continental weathering rates caused by warming during the Smithian.