Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3986/AGS.7233 |
THE ISOTOPIC GEOCHEMISTRY OF CaCO3 ENCRUSTATIONS IN TAYLOR VALLEY, ANTARCTICA: IMPLICATIONS FOR THEIR ORIGIN | |
Lyons, Berry; Foley, Kelly; Carey, Anne; Diaz, Melisa; Bowen, Gabriel; Cerling, Thure | |
通讯作者 | Lyons, B (corresponding author), Ohio State Univ, Byrd Polar & Climate Res Ctr, Sch Earth Sci, Columbus, OH 43210 USA. |
来源期刊 | ACTA GEOGRAPHICA SLOVENICA-GEOGRAFSKI ZBORNIK
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ISSN | 1581-6613 |
EISSN | 1854-5106 |
出版年 | 2020 |
卷号 | 60期号:2页码:125-139 |
英文摘要 | Calcium carbonate (CaCO3) encrustations occur in most desert soils, including polar ones, and such encrustations preserve records of geochemical, hydrological, and atmosphere processes affecting these soils. We have collected a series of CaCO3 encrustations found underneath surface rocks in the soils and tills of Taylor Valley, McMurdo Dry Valleys (similar to 78 degrees S lat.), Antarctica. These encrustations were analyzed for Sr-87/S-86 and delta O-18 and delta C-13 to determine what relation they have with the underlying soils, and the material in which they are in contact, and to identify the processes that control their formation. In all but one case, the isotopic data indicate that the source of Sr to these encrustations is not from the rock on which it is associated. The primary source of Sr (and by analogy Ca) is either from dust that has been deposited through aeolian processes or from the aggregate of till material within the soils. The delta C-13 values for Taylor Valley encrustations ranged from 5.7 to 11.0%, and are consistent with a carbon source from atmospheric CO2. The delta O-18 values range from -8.1 to -11.2% and are heavier than expected for equilibrium calcite precipitation from Taylor Valley meteoric water. Taken together these results indicate that the CaCO3 was formed by rapid evaporation of films beneath clasts that had become supersaturated with respect to CaCO3. |
英文关键词 | calcium carbonate isotopic ratio salt deposit McMurdo Dry Valleys Antarctica |
类型 | Article |
语种 | 英语 |
开放获取类型 | gold |
收录类别 | SCI-E |
WOS记录号 | WOS:000614880400008 |
WOS关键词 | MCMURDO DRY VALLEYS ; SOUTHERN VICTORIA LAND ; PEDOGENIC CARBONATE ; SOIL CARBONATE ; STABLE ISOTOPES ; ICE-SHEET ; ROSS SEA ; DESERT ; STRONTIUM ; CLIMATE |
WOS类目 | Geography, Physical |
WOS研究方向 | Physical Geography |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/348680 |
作者单位 | [Lyons, Berry; Carey, Anne; Diaz, Melisa] Ohio State Univ, Byrd Polar & Climate Res Ctr, Sch Earth Sci, Columbus, OH 43210 USA; [Foley, Kelly] Ball Corp, Denver, CO USA; [Bowen, Gabriel; Cerling, Thure] Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA |
推荐引用方式 GB/T 7714 | Lyons, Berry,Foley, Kelly,Carey, Anne,et al. THE ISOTOPIC GEOCHEMISTRY OF CaCO3 ENCRUSTATIONS IN TAYLOR VALLEY, ANTARCTICA: IMPLICATIONS FOR THEIR ORIGIN[J],2020,60(2):125-139. |
APA | Lyons, Berry,Foley, Kelly,Carey, Anne,Diaz, Melisa,Bowen, Gabriel,&Cerling, Thure.(2020).THE ISOTOPIC GEOCHEMISTRY OF CaCO3 ENCRUSTATIONS IN TAYLOR VALLEY, ANTARCTICA: IMPLICATIONS FOR THEIR ORIGIN.ACTA GEOGRAPHICA SLOVENICA-GEOGRAFSKI ZBORNIK,60(2),125-139. |
MLA | Lyons, Berry,et al."THE ISOTOPIC GEOCHEMISTRY OF CaCO3 ENCRUSTATIONS IN TAYLOR VALLEY, ANTARCTICA: IMPLICATIONS FOR THEIR ORIGIN".ACTA GEOGRAPHICA SLOVENICA-GEOGRAFSKI ZBORNIK 60.2(2020):125-139. |
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