Geochemistry of streams from Byers Peninsula, Livingston Island

被引:14
作者
Lyons, W. Berry [1 ]
Welch, K. A. [1 ]
Welch, S. A. [1 ]
Camacho, A. [2 ]
Rochera, C. [2 ]
Michaud, L. [3 ]
Dewit, R. [4 ]
Carey, A. E. [1 ]
机构
[1] Ohio State Univ, Sch Earth Sci & Byrd Polar Res Ctr, Columbus, OH 43210 USA
[2] Univ Valencia, Inst Cavanilles Biodivers & Evolutionary Biol, E-46100 Burjassot, Spain
[3] Univ Messina, I-98100 Messina, Italy
[4] Univ Montpellier, Montpellier, France
基金
美国国家科学基金会;
关键词
Antarctic; freshwater; hydrology; lithology; South Shetland Islands; SOUTH-SHETLAND-ISLANDS; TAYLOR VALLEY; WATER CHEMISTRY; SIGNY ISLAND; ANTARCTICA; RIVER; ASSEMBLAGES; ECOSYSTEMS; CATCHMENT; SEDIMENTS;
D O I
10.1017/S0954102012000776
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In January and February 2009, a series of water samples were collected from streams on Byers Peninsula. These samples were analysed for major elements and delta O-18 to determine the role of lithology and landscape position on stream geochemistry, and to understand better the hydrology (i.e. residence time of water) of these systems. Precipitation chemistry is enriched in Na+, as are the streams located close to the coast. Streams originating from inland locations have much higher percentages of Ca2+. In contrast, Mg2+ varied little, though streams that are in greater contact with volcanic-derived soils have slightly higher concentrations. Anion percentages varied greatly between streams with SO42- ranging from 5% to 45% of the anion composition. Dissolved Si concentrations as high as 141 mu M were observed. All these data suggest that active chemical weathering is occurring in this region. A time series over 13 days at one stream showed little variation in major element geochemistry. The delta O-18 of precipitation samples collected over this same period varied by similar to 10 parts per thousand while the majority of stream samples varied less than similar to 1.5 parts per thousand. These data indicate that the stream waters represent mixtures of precipitation events, melting snow and water from the subsurface that had gained solutes through chemical weathering.
引用
收藏
页码:181 / 190
页数:10
相关论文
共 40 条
[1]   A LATE HOLOCENE LAKE SEDIMENT SEQUENCE FROM LIVINGSTON-ISLAND, SOUTH-SHETLAND-ISLANDS, WITH PALEOCLIMATIC IMPLICATIONS [J].
BJORCK, S ;
HAKANSSON, H ;
ZALE, R ;
KARLEN, W ;
JONSSON, BL .
ANTARCTIC SCIENCE, 1991, 3 (01) :61-72
[2]  
Blum JD, 1998, GEOLOGY, V26, P411, DOI 10.1130/0091-7613(1998)026<0411:CVSWIT>2.3.CO
[3]  
2
[4]   Planktonic microbial assemblages and the potential effects of metazooplankton predation on the food web of lakes from the maritime Antarctica and sub-Antarctic islands [J].
Camacho A. .
Reviews in Environmental Science and Bio/Technology, 2006, 5 (2-3) :167-185
[5]   Chemistry of streams of Signy Island, maritime Antarctic: Sources of major ions [J].
Caulkett, AP ;
EllisEvans, JC .
ANTARCTIC SCIENCE, 1997, 9 (01) :3-11
[6]   STRATIGRAPHY AND REGIONAL SIGNIFICANCE OF THE UPPER-JURASSIC LOWER-CRETACEOUS BYERS GROUP, LIVINGSTON ISLAND, ANTARCTICA [J].
CRAME, JA ;
PIRRIE, D ;
CRAMPTON, JS ;
DUANE, AM .
JOURNAL OF THE GEOLOGICAL SOCIETY, 1993, 150 :1075-1087
[7]   Geochemistry of large river suspended sediments:: Silicate weathering or recycling tracer? [J].
Gaillardet, J ;
Dupré, B ;
Allègre, CJ .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1999, 63 (23-24) :4037-4051
[8]   Stream geochemistry, chemical weathering and CO2 consumption potential of andesitic terrains, Dominica, Lesser Antilles [J].
Goldsmith, Steven T. ;
Carey, Anne E. ;
Johnson, Brent M. ;
Welch, Susan A. ;
Lyons, W. Berry ;
McDowell, William H. ;
Pigott, Jeffrey S. .
GEOCHIMICA ET COSMOCHIMICA ACTA, 2010, 74 (01) :85-103
[9]   Weathering reactions and hyporheic exchange controls on stream water chemistry in a glacial meltwater stream in the McMurdo Dry Valleys [J].
Gooseff, MN ;
McKnight, DM ;
Lyons, WB ;
Blum, AE .
WATER RESOURCES RESEARCH, 2002, 38 (12)
[10]   Geochemical processes in the Onyx River, Wright Valley, Antarctica: Major ions, nutrients, trace [J].
Green, WJ ;
Stage, BR ;
Preston, A ;
Wagers, S ;
Shacat, J ;
Newell, S .
GEOCHIMICA ET COSMOCHIMICA ACTA, 2005, 69 (04) :839-850