Investigation of Isotopic and Geochemical Evidence for an Active Planktonic Biota in the Precambrian

摘要

The funded research was motivated by the earlier study of Burdett et al. (1990), who collected carbon and oxygen isotopic data from Paleoproterozoic rocks of the Northwest Territories from deep-and shallow-water facies of the Rocknest Platform. Their results displayed a possible decrease in (delta)C-13 with depth when arranged by increasing distance from the paleoshore. The most C-13-depleted samples were seafloor cements and fans from the underlying siliciclastic Odjick Formation, and slope carbonates of the Rocknest platform.