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13C-depleted carbon microparticles in >3700-Ma sea-floor sedimentary rocks from west Greenland

被引：435
作者：
Rosing, MT
机构：
[1] Geol Museum, DK-1350 Kobenhavn K, Denmark
[2] Danish Lithosphere Ctr, DK-1350 Kobenhavn, Denmark
来源：
SCIENCE | 1999年 / 283卷 / 5402期
关键词：
D O I：
10.1126/science.283.5402.674
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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 delta(13)C 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.
引用
收藏
页码：674 / 676
页数：3
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