干旱区生态环境知识资源中心(Arid): High Survivability of Micrometeorites on Mars: Sites With Enhanced Availability of Limiting Nutrients

Arid

DOI	10.1029/2019JE006005
	High Survivability of Micrometeorites on Mars: Sites With Enhanced Availability of Limiting Nutrients
	Tomkins, Andrew G.1; Genge, Matthew J.2,3; Tait, Alastair W.1,4; Alkemade, Sarah L.1; Langendam, Andrew D.1; Perry, Prudence P.1; Wilson, Siobhan A.5
通讯作者	Tomkins, Andrew G.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
ISSN	2169-9097
EISSN	2169-9100
出版年	2019
卷号	124 期号:7 页码:1802-1818
英文摘要	NASA's strategy in exploring Mars has been to follow the water, because water is essential for life, and it has been found that there are many locations where there was once liquid water on the surface. Now perhaps, to narrow down the search for life on a barren basalt-dominated surface, there needs to be a refocusing to a strategy of follow the nutrients. Here we model the entry of metallic micrometeoroids through the Martian atmosphere, and investigate variations in micrometeorite abundance at an analogue site on the Nullarbor Plain in Australia, to determine where the common limiting nutrients available in these (e.g., P, S, Fe) become concentrated on the surface of Mars. We find that dense micrometeorites are abundant in a range of desert environments, becoming concentrated by aeolian processes into specific sites that would be easily investigated by a robotic rover. Our modeling suggests that micrometeorites are currently far more abundant on the surface of Mars than on Earth, and given the far greater abundance of water and warmer conditions on Earth and thus much more active weather system, this was likely true throughout the history of Mars. Because micrometeorites contain a variety of redox sensitive minerals including FeNi alloys, sulfide and phosphide minerals, and organic compounds, the sites where these become concentrated are far more nutrient rich, and thus more compatible with chemolithotrophic life than most of the Martian surface.
英文关键词	Mars micrometeorites cosmic dust atmospheric chemistry Mars biology
类型	Article
语种	英语
国家	Australia ; England ; Scotland ; Canada
开放获取类型	Green Published, Bronze
收录类别	SCI-E
WOS记录号	WOS:000481444400010
WOS关键词	COSMIC SPHERULES ; ACCRETION RATE ; OXYGEN ; DUST ; IRON ; PERCHLORATE ; SEDIMENTARY ; ATMOSPHERE ; HYDROGEN ; DEPOSITS
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217097
作者单位	1.Sch Earth Atmosphere & Environm, Melbourne, Vic, Australia; 2.Imperial Coll London, Impact & Astromat Res Ctr, Dept Earth Sci & Engn, London, England; 3.Nat Hist Museum, Dept Mineral, London, England; 4.Univ Stirling, Dept Biol & Environm Sci, Stirling, Scotland; 5.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB, Canada
推荐引用方式 GB/T 7714	Tomkins, Andrew G.,Genge, Matthew J.,Tait, Alastair W.,et al. High Survivability of Micrometeorites on Mars: Sites With Enhanced Availability of Limiting Nutrients[J],2019,124(7):1802-1818.
APA	Tomkins, Andrew G..,Genge, Matthew J..,Tait, Alastair W..,Alkemade, Sarah L..,Langendam, Andrew D..,...&Wilson, Siobhan A..(2019).High Survivability of Micrometeorites on Mars: Sites With Enhanced Availability of Limiting Nutrients.JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS,124(7),1802-1818.
MLA	Tomkins, Andrew G.,et al."High Survivability of Micrometeorites on Mars: Sites With Enhanced Availability of Limiting Nutrients".JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS 124.7(2019):1802-1818.