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DOI | 10.1073/pnas.2003276117 |
Evidence for sodium-rich alkaline water in the Tagish Lake parent body and implications for amino acid synthesis and racemization | |
White, Lee F.1,2; Tait, Kimberly T.1,2; Langelier, Brian3; Lymer, Elizabeth A.4; Cernok, Ana1,2; Kizovski, Tanya V.1,2; Ma, Chi5; Tschauner, Oliver6; Nicklin, Richard I.1 | |
2020-05-11 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:21页码:11217-11219 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; USA |
英文摘要 | Understanding the timing and mechanisms of amino acid synthesis and racemization on asteroidal parent bodies is key to demonstrating how amino acids evolved to be mostly left-handed in living organisms on Earth. It has been postulated that racemization can occur rapidly dependent on several factors, including the pH of the aqueous solution. Here, we conduct nanoscale geochemical analysis of a framboidal magnetite grain within the Tagish Lake carbonaceous chondrite to demonstrate that the interlocking crystal arrangement formed within a sodium-rich, alkaline fluid environment. Notably, we report on the discovery of Na-enriched subgrain boundaries and nanometer-scale Ca and Mg layers surrounding individual framboids. These interstitial coatings would yield a surface charge state of zero in more-alkaline fluids and prevent assimilation of the individual framboids into a single grain. This basic solution would support rapid synthesis and racemization rates on the order of years, suggesting that the low abundances of amino acids in Tagish Lake cannot be ascribed to fluid chemistry. |
英文关键词 | Tagish Lake framboidal magnetite atom probe tomography amino acid |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000536797100010 |
WOS关键词 | AQUEOUS ALTERATION |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249684 |
专题 | 地球科学 |
作者单位 | 1.Royal Ontario Museum, Dept Nat Hist, Toronto, ON M5S 2C6, Canada; 2.Univ Toronto, Dept Earth Sci, Toronto, ON M5S 3B1, Canada; 3.McMaster Univ, Canadian Ctr Electron Microscopy, Hamilton, ON L8S 4M1, Canada; 4.York Univ, Lassonde Sch Engn, N York, ON M3J 1P3, Canada; 5.CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA; 6.Univ Nevada, Dept Geosci, Las Vegas, NV 89154 USA |
推荐引用方式 GB/T 7714 | White, Lee F.,Tait, Kimberly T.,Langelier, Brian,et al. Evidence for sodium-rich alkaline water in the Tagish Lake parent body and implications for amino acid synthesis and racemization[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(21):11217-11219. |
APA | White, Lee F..,Tait, Kimberly T..,Langelier, Brian.,Lymer, Elizabeth A..,Cernok, Ana.,...&Nicklin, Richard I..(2020).Evidence for sodium-rich alkaline water in the Tagish Lake parent body and implications for amino acid synthesis and racemization.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(21),11217-11219. |
MLA | White, Lee F.,et al."Evidence for sodium-rich alkaline water in the Tagish Lake parent body and implications for amino acid synthesis and racemization".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.21(2020):11217-11219. |
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