干旱区生态环境知识资源中心(Arid): Surface mineral crusts: a potential strategy for sampling for evidence of life on Mars

Arid

DOI	10.1017/S1473550418000034
	Surface mineral crusts: a potential strategy for sampling for evidence of life on Mars
	Brolly, Connor; Parnell, John; Bowden, Stephen
通讯作者	Brolly, Connor
来源期刊	INTERNATIONAL JOURNAL OF ASTROBIOLOGY
ISSN	1473-5504
EISSN	1475-3006
出版年	2019
卷号	18 期号:2 页码:91-101
英文摘要	Surface mineral crusts on Earth are highly diverse and usually, contain microbial life. Crusts constitute an attractive target to search for life: they require water for their formation, they efficiently entrap organic matter and are relatively easy to sample and process. They hold a record of life in the form of microbial remains, biomolecules and carbon isotope composition. A miniaturized Raman spectrometer is included in the ExoMars 2020 payload as it is sensitive to a range of photosynthetic pigments. Samples from the Haughton Impact Structure, Canadian High Arctic and others, shows the preservation of pigments in a range of crust types, especially supra-permafrost carbonate crusts and cryptogamic crusts. The Raman spectral signatures of these crusts are shown along with biomarker analysis to showcase these techniques prior to the ExoMars 2020 mission. Carotenoids and other photoprotective microbial pigments are identified in the Haughton surface crusts using Raman spectroscopy. Gas chromatography-mass spectrometry analyses show a distribution of fatty acids which are most likely from a cyanobacterial source. The successful demonstration of these analyses in the Haughton Impact structure shows the biosignature of surface mineral crusts can be easily extracted and provides an excellent target for sampling evidence of life on Mars.
英文关键词	Astrobiology ExoMars 2020 Mars surface mineral crusts
类型	Article
语种	英语
国家	Scotland
开放获取类型	hybrid, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000463227400001
WOS关键词	HAUGHTON IMPACT STRUCTURE ; MESOZOIC CONVERGENT MARGIN ; POLAR DESERT ECOSYSTEM ; DEVON ISLAND ; ROCK-VARNISH ; MICROBIAL COMMUNITIES ; CRYPTOGAMIC CRUSTS ; RAMAN-SPECTROSCOPY ; MERIDIANI-PLANUM ; LIPID BIOMARKER
WOS类目	Astronomy & Astrophysics ; Biology ; Geosciences, Multidisciplinary
WOS研究方向	Astronomy & Astrophysics ; Life Sciences & Biomedicine - Other Topics ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216351
作者单位	Univ Aberdeen, Dept Geol & Petr Geol, Aberdeen AB24 3UE, Scotland
推荐引用方式 GB/T 7714	Brolly, Connor,Parnell, John,Bowden, Stephen. Surface mineral crusts: a potential strategy for sampling for evidence of life on Mars[J],2019,18(2):91-101.
APA	Brolly, Connor,Parnell, John,&Bowden, Stephen.(2019).Surface mineral crusts: a potential strategy for sampling for evidence of life on Mars.INTERNATIONAL JOURNAL OF ASTROBIOLOGY,18(2),91-101.
MLA	Brolly, Connor,et al."Surface mineral crusts: a potential strategy for sampling for evidence of life on Mars".INTERNATIONAL JOURNAL OF ASTROBIOLOGY 18.2(2019):91-101.