Unradiogenic strontium and moderate-amplitude carbon isotope variations in early Tonian seawater after the assembly of Rodinia and before the Bitter Springs Excursion

摘要

Highlights ? Assembly of Rodinia did not contribute radiogenic Sr to seawater. ? Early Tonian seawater experienced moderate-amplitude δ13C variations. ? Rodinia was ringed by continental arcs, had high freeboard, and internal runoff. ? There is striking similarity between Paleoproterozoic and Neoproterozoic events. Abstract Neoproterozoic sedimentary records reveal a poorly documented, ～150m.y. time interval, between ～1000 and 850Ma, t