Abiogenic hydrocarbon production at Lost City hydrothermal field

被引：624

作者：

Proskurowski, Giora ^{[1
,2
]}

Lilley, Marvin D. ^{[1
]}

Seewald, Jeffery S. ^{[2
]}

Fruh-Green, Gretchen L. ^{[3
]}

Olson, Eric J. ^{[1
]}

Lupton, John E. ^{[4
]}

Sylva, Sean P. ^{[2
]}

Kelley, Deborah S. ^{[1
]}

机构：

[1] Univ Washington, Sch Oceanog, Seattle, WA 98195 USA

[2] Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA

[3] ETH Zentrum, Dept Earth Sci, Zurich, Switzerland

[4] NOAA, Pacific Marine Environm Lab, Newport, OR 97365 USA

来源：

SCIENCE | 2008年 / 319卷 / 5863期

关键词：

D O I：

10.1126/science.1151194

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：

Low- molecular- weight hydrocarbons in natural hydrothermal fluids have been attributed to abiogenic production by Fischer- Tropsch type ( FTT) reactions, although clear evidence for such a process has been elusive. Here, we present concentration, and stable and radiocarbon isotope, data from hydrocarbons dissolved in hydrogen- rich fluids venting at the ultramafic- hosted Lost City Hydrothermal Field. A distinct "inverse" trend in the stable carbon and hydrogen isotopic composition of C-1 to C-4 hydrocarbons is compatible with FTT genesis. Radiocarbon evidence rules out seawater bicarbonate as the carbon source for FTT reactions, suggesting that a mantle- derived inorganic carbon source is leached from the host rocks. Our findings illustrate that the abiotic synthesis of hydrocarbons in nature may occur in the presence of ultramafic rocks, water, and moderate amounts of heat.

引用

页码：604 / 607

页数：4

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