干旱区生态环境知识资源中心(Arid): THE ISOTOPIC GEOCHEMISTRY OF CaCO3 ENCRUSTATIONS IN TAYLOR VALLEY, ANTARCTICA: IMPLICATIONS FOR THEIR ORIGIN

Arid

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
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.