气候变化领域集成服务门户(CCPortal): Carbon isotopic composition of Frutexites in subseafloor ultramafic rocks

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DOI	10.1007/s10533-021-00806-7
	Carbon isotopic composition of Frutexites in subseafloor ultramafic rocks
	Neubeck A.; Ivarsson M.; Broman C.; Lima-Zaloumis J.; Bach W.; Whitehouse M.
发表日期	2021
ISSN	1682563
起始页码	525
结束页码	536
卷号	154 期号:3
英文摘要	Micrometer sized stromatolitic structures called Frutexites are features observed in samples from the deep subsurface, and hot-spring environments. These structures are comprised of fine laminations, columnar morphology, and commonly consist of iron oxides, manganese oxides, and/or carbonates. Although a biological origin is commonly invoked, few reports have shown direct evidence of their association with microbial activity. Here, we report for the first time the occurrence of subsurface manganese-dominated Frutexites preserved within carbonate veins in ultramafic rocks. To determine the biogenicity of these putative biosignatures, we analyzed their chemical and isotopic composition using Raman spectroscopy and secondary ion mass spectroscopy (SIMS). These structures were found to contain macromolecular carbon signal and have a depleted 13C/12C carbon isotopic composition of – 35.4 ± 0.50‰ relative to the entombing carbonate matrix. These observations are consistent with a biological origin for the observed Frutexites structures. © 2021, The Author(s).
英文关键词	Biogenicity; Carbon isotopes; Deep subsurface biosphere; Fossilized microorganisms; Frutexites; Ultramafic
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184581
作者单位	Department of Geological Sciences, Uppsala University, Uppsala, Sweden; Department of Paleobiology, Swedish Museum of Natural History, Stockholm, Sweden; Department of Geological Sciences, Stockholm University, Stockholm, Sweden; School of Earth and Space Exploration, Arizona State UniversityAZ, United States; MARUM - Center for Marine Environmental Sciences, Universität Bremen, Bremen, Germany; Department of Earth Sciences, Swedish Museum of Natural History, Stockholm, Sweden
推荐引用方式 GB/T 7714	Neubeck A.,Ivarsson M.,Broman C.,et al. Carbon isotopic composition of Frutexites in subseafloor ultramafic rocks[J],2021,154(3).
APA	Neubeck A.,Ivarsson M.,Broman C.,Lima-Zaloumis J.,Bach W.,&Whitehouse M..(2021).Carbon isotopic composition of Frutexites in subseafloor ultramafic rocks.Biogeochemistry,154(3).
MLA	Neubeck A.,et al."Carbon isotopic composition of Frutexites in subseafloor ultramafic rocks".Biogeochemistry 154.3(2021).