13C-Depleted Carbon Microparticles in >3700-Ma Sea-floor Sedimentary Rocks from West Greenland

Overview

Journal Science

Specialty Science

Date 1999 Jan 29

PMID 9924024

Citations 72

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Abstract

Turbiditic and pelagic sedimentary rocks from the Isua supracrustal belt in west Greenland [more than 3700 million years ago (Ma)] contain reduced carbon that is likely biogenic. The carbon is present as 2- to 5-micrometer graphite globules and has an isotopic composition of delta13C that is about -19 per mil (Pee Dee belemnite standard). These data and the mode of occurrence indicate that the reduced carbon represents biogenic detritus, which was perhaps derived from planktonic organisms.

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