The Geochemical Evolution of the Blood Falls Hypersaline System
| Main Author: | |
|---|---|
| Language: | English |
| Published: |
The Ohio State University / OhioLINK
2015
|
| Subjects: | |
| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=osu1438715896 |
| id |
ndltd-OhioLink-oai-etd.ohiolink.edu-osu1438715896 |
|---|---|
| record_format |
oai_dc |
| spelling |
ndltd-OhioLink-oai-etd.ohiolink.edu-osu14387158962021-08-03T06:32:34Z The Geochemical Evolution of the Blood Falls Hypersaline System German, Laura Lynne Earth Analytical Chemistry Environmental Science Blood Falls subglacial brine Ice Mole cryoconcentration evapoconcentration trace elements Interest in subglacial environments in polar regions has grown from a curiosity to a challenging scientific endeavor. However, there are few geochemical data from these environments due to the difficulty of clean sample collection. The project entitled Minimally Invasive Direct Glacial Exploration (MIDGE) was developed to perform chemically clean and biologically aseptic sample collection in the unusual subglacial environment Blood Falls, Taylor Glacier, Antarctica. The MIDGE project was conducted with the German-engineered thermoelectric melting probe “Ice Mole”. In this work, a number of activities were undertaken. Blanks from the Ice Mole were analyzed for biogeochemical cleanliness, an analytical technique was developed for trace element analysis, and the geochemical composition of hypersaline Blood Falls water was determined. Results indicate the Ice Mole is chemically clean for Cl, Br, F, SO4, Li, Na, K, Mg, Ca, B, Fe, Sr, U, organic carbon, P and Si when compared to the solute concentrations observed in the brine. The Ice Mole could introduce concentrations of As, Al, Ba, Co, Cu, Mn, Mo, Ni, Rb, V, NH3, and NO3+NO2 N in greater amounts than what naturally occurs in Taylor Glacier ice. Blood Falls subglacial water samples contained concentrations of the above elements in the following amounts: Cl 72400 mg/L; Br 174 mg/L; F 2.40 mg/L; SO4 5620 mg/L; Li 4.73 mg/L; Na 38700 mg/L; K 1190; Mg 4850 mg/L; Ca 3140 mg/L; NPOC 590 µM; B 23500 µg/L; Fe 14800 µg/L; Sr 59700 µg/L; U 128 µg/L; P 1.27 µM; Si 484 µM. All trace elements measured in subglacial Blood Falls water were more concentrated than those measured in the Blood Falls surface expression and West Lobe Lake Bonney. Subglacial Blood Falls water remains more concentrated in major ions than the Blood Falls surface expression and West Lobe Lake Bonney at shallow depths, but the deeper waters of West Lobe Lake Bonney are more concentrated in Cl, Br, Li K, and Mg than subglacial Blood Falls. 2015 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1438715896 http://rave.ohiolink.edu/etdc/view?acc_num=osu1438715896 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Earth Analytical Chemistry Environmental Science Blood Falls subglacial brine Ice Mole cryoconcentration evapoconcentration trace elements |
| spellingShingle |
Earth Analytical Chemistry Environmental Science Blood Falls subglacial brine Ice Mole cryoconcentration evapoconcentration trace elements German, Laura Lynne The Geochemical Evolution of the Blood Falls Hypersaline System |
| author |
German, Laura Lynne |
| author_facet |
German, Laura Lynne |
| author_sort |
German, Laura Lynne |
| title |
The Geochemical Evolution of the Blood Falls Hypersaline System |
| title_short |
The Geochemical Evolution of the Blood Falls Hypersaline System |
| title_full |
The Geochemical Evolution of the Blood Falls Hypersaline System |
| title_fullStr |
The Geochemical Evolution of the Blood Falls Hypersaline System |
| title_full_unstemmed |
The Geochemical Evolution of the Blood Falls Hypersaline System |
| title_sort |
geochemical evolution of the blood falls hypersaline system |
| publisher |
The Ohio State University / OhioLINK |
| publishDate |
2015 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1438715896 |
| work_keys_str_mv |
AT germanlauralynne thegeochemicalevolutionofthebloodfallshypersalinesystem AT germanlauralynne geochemicalevolutionofthebloodfallshypersalinesystem |
| _version_ |
1719438760133787648 |