气候变化领域集成服务门户(CCPortal): Search for past life on Mars: Possible relic biogenic activity in martian meteorite ALH84001

CCPortal

DOI	10.1126/science.273.5277.924
	Search for past life on Mars: Possible relic biogenic activity in martian meteorite ALH84001
	McKay D.S.; Gibson Jr. E.K.; Thomas-Keprta K.L.; Vali H.; Romanek C.S.; Clemett S.J.; Chillier X.D.F.; Maechling C.R.; Zare R.N.
发表日期	1996
ISSN	0036-8075
起始页码	924
结束页码	930
卷号	273 期号:5277
英文摘要	Fresh fracture surfaces of the martian meteorite ALH84001 contain abundant polycyclic aromatic hydrocarbons (PAHs). These fresh fracture surfaces also display carbonate globules. Contamination studies suggest that the PAHs are indigenous to the meteorite. High-resolution scanning and transmission electron microscopy study of surface textures and internal structures of selected carbonate globules show that the globules contain fine-grained, secondary phases of single-domain magnetite and Fe-sulfides. The carbonate globules are similar in texture and size to some terrestrial bacterially induced carbonate precipitates. Although inorganic formation is possible, formation of the globules by biogenic processes could explain many of the observed features, including the PAHs. The PAHs, the carbonate globules, and their associated secondary mineral phases and textures could thus be fossil remains of a past martian biota.
英文关键词	magnetite; polycyclic aromatic hydrocarbon; article; astronomy; biogenesis; life; meteorology; priority journal; scanning electron microscopy; transmission electron microscopy; cellular organisms; biogenic activity; carbonate; martian meteorite; meteorite ALH84001; PAH
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244712
作者单位	Mail Code SN, NASA Lyndon B. Johnson Space Center, Houston, TX 77058, United States; Mail Code SN4, NASA-JSC, Houston, TX 77058, United States; Lockheed Martin, Mail Code C23, 2400 NASA Road 1, Houston, TX 77058, United States; Dept. of Earth and Planet. Sciences, McGill University, 3450 University St., Montreal, Que. H3A 2A7, Canada; Savannah River Ecology Laboratory, Drawer E, University of Georgia, Aiken, SC 29802, United States; Department of Chemistry, Stanford University, Stanford, CA 94305-5080, United States
推荐引用方式 GB/T 7714	McKay D.S.,Gibson Jr. E.K.,Thomas-Keprta K.L.,et al. Search for past life on Mars: Possible relic biogenic activity in martian meteorite ALH84001[J],1996,273(5277).
APA	McKay D.S..,Gibson Jr. E.K..,Thomas-Keprta K.L..,Vali H..,Romanek C.S..,...&Zare R.N..(1996).Search for past life on Mars: Possible relic biogenic activity in martian meteorite ALH84001.Science,273(5277).
MLA	McKay D.S.,et al."Search for past life on Mars: Possible relic biogenic activity in martian meteorite ALH84001".Science 273.5277(1996).