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Abstract
Geochemical analysis summary table for samples collected during drilling of 70m deep borehole. On 17-18 November 2010 a 70-m deep borehole was drilled at the Calhoun Long Term Soil Experiment site to examine soil properties down to the bedrock. These results were published as Table 1 in Bacon et al. 2012.
We sampled a residual soil, classified as Oxyaquic Kanhapludult of the Cataula series, and underlying granite gneiss on a broad interfluve with
Date Range Comments: Samples collected during a single event, the drilling of 70m deep borehole.
We collected 3 continuous cores (10 m apart), each to a depth of 6.1 m, and collected deeper samples from a single point 30 m away. Saprolite from 6.1–18.3 m was sampled with a three-wing auger bit, and unweathered granite gneiss, contacted at 30.5 m, was sampled to 67.1 m with a roller-cone bit. We separated samples by horizon and depth, and air-dried all samples. We sieved soil and/or saprolite with a 2 mm screen, and found coarse fragments in only 8 of the 52 samples. By volume, these fragments composed 1%–11% (mean = 7%) of the 8 samples, and were removed from our analysis. We measured total elemental concentrations of all samples by inductively coupled plasma–atomic emission spectroscopy or flame atomic absorption spectroscopy (AAS) after LiBO2 fusion, and measured texture, pH in 0.01 M CaCl2, total carbon (C), exchangeable base cations (Ca, Mg, K, and Na), and exchangeable acidity on all soil and/or saprolite samples (Carter, 1993; Dane and Topp, 2002; Sparks, 2002).
We composited (by horizon) across the continuous cores, extracted the composited samples and samples from 6.1–18.3 m with hydroxylamine hydrochloride (1 M NH2OH·HCl in 1 M HCl; Wiederhold et al., 2007), and measured Be and Fe in solution by furnace and flame AAS, respectively. By complete dissolution of oxide minerals at low pH, hydroxylamine hydrochloride extractable (hhe) metals are an operationally defined pool that have been weathered from primary minerals and retained in the soil, and in our analyses are akin to the familiar dithionite citrate bicarbonate extractable metals (Fig. DR2) popularized by Mehra and Jackson (1958). We further composited these samples across horizons (Table 1), isolated meteoric 10Be with a method modified from Stone (1998), and measured 10Be/9Be isotopic ratios by accelerator mass spectrometry (AMS).
Subject Keywords
Coverage
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Content
ReadMe.md
CCZO -- Soil Geochemistry -- Calhoun 70m deep well -- (2010)
OVERVIEW
Description/Abstract
Geochemical analysis summary table for samples collected during drilling of 70m deep borehole. On 17-18 November 2010 a 70-m deep borehole was drilled at the Calhoun Long Term Soil Experiment site to examine soil properties down to the bedrock. These results were published as Table 1 in Bacon et al. 2012.
We sampled a residual soil, classified as Oxyaquic Kanhapludult of the Cataula series, and underlying granite gneiss on a broad interfluve with
Creator/Author
Bacon, Allan R|Richter, Daniel deB.|Bierman, Paul R.|Rood, Dylan H.
CZOs
Calhoun
Contact
Allan Bacon, School of Forest Resources & Conservation, University of Florida. allan.bacon@duke.edu
Subtitle
Geochemical analysis summary table for samples collected during drilling of 70m deep borehole.
SUBJECTS
Disciplines
Soil Science / Pedology|Geochemistry / Mineralogy
Topics
Soil Geochemistry
Keywords
soil geochemistry|calhoun|deep core
Variables
horizon|depth (m)|bulk density (g/cm3)|clay (%)|sand(%)|pH|C (%)|effective cation exchange capacity (cmol/kg)|effective base saturation (%)|total Zr (mg/g)|total Ca (mg/g)|total Al (mg/g)|total Fe (mg/g)|hhe Fe (mg/g)|total 9Be (ug/g)|hhe 9Be (ug/g)|10Be (10^8 atm/g)|strain
Variables ODM2
Beryllium-10|Bulk density|Chlorophyll c|Clay|Depth, soil|Base saturation|Cation exchange capacity (CEC)|Iron|Soil horizon|pH|Sand|Aluminum|Calcium, total|Zirconium
TEMPORAL
Date Start
2010-11-17
Date End
2010-11-18
Date Range Comments
Samples collected during a single event, the drilling of 70m deep borehole.
SPATIAL
Field Areas
Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas
Location
Calhoun 70m deep well
North latitude
34.6069235
South latitude
34.6069235
West longitude
-81.7238054
East longitude
-81.7238054
REFERENCE
Citation
Bacon, Allan R; Richter, Daniel deB, Bierman, Paul R.; Rood, Dylan H. (2012) Coupling meteoric 10Be with pedogenic losses of 9Be to improve soil residence time estimates on an ancient North American interfluve. Geology 40 (9): 847-850, doi: 10.1130/G33449.
Publications of this data
Bacon, Allan R., Daniel deB. Richter, Paul R. Bierman, and Dylan H. Rood (2012). Coupling meteoric 10Be with pedogenic losses of 9Be to improve soil residence time estimates on an ancient North American interfluve. Geology 40 (9): 847–850 http://dx.doi.org/10.1130/G33449.1
CZO ID
4018
Award Grant Numbers
National Science Foundation - EAR-0632516
National Science Foundation - EAR-0819857
U.S. Department of Energy - DE-AC52-07NA27344
COMMENTS
Comments
The Critical Zone Exploration Network (CZEN) (National Science Foundation grants EAR-0632516 and EAR-0819857) and the U.S. Department of Energy (Lawrence Livermore National Laboratory, contract DE-AC52-07NA27344) supported this work.
Additional Metadata
| Name | Value |
|---|---|
| czos | Calhoun |
| czo_id | 4018 |
| citation | Bacon, Allan R; Richter, Daniel deB, Bierman, Paul R.; Rood, Dylan H. (2012) Coupling meteoric 10Be with pedogenic losses of 9Be to improve soil residence time estimates on an ancient North American interfluve. Geology 40 (9): 847-850, doi: 10.1130/G33449. |
| comments | The Critical Zone Exploration Network (CZEN) (National Science Foundation grants EAR-0632516 and EAR-0819857) and the U.S. Department of Energy (Lawrence Livermore National Laboratory, contract DE-AC52-07NA27344) supported this work. |
| keywords | soil geochemistry, calhoun, deep core |
| subtitle | Geochemical analysis summary table for samples collected during drilling of 70m deep borehole. |
| variables | horizon, depth (m), bulk density (g/cm3), clay (%), sand(%), pH, C (%), effective cation exchange capacity (cmol/kg), effective base saturation (%), total Zr (mg/g), total Ca (mg/g), total Al (mg/g), total Fe (mg/g), hhe Fe (mg/g), total 9Be (ug/g), hhe 9Be (ug/g), 10Be (10^8 atm/g), strain |
| disciplines | Soil Science / Pedology, Geochemistry / Mineralogy |
| date_range_comments | Samples collected during a single event, the drilling of 70m deep borehole. |
Related Resources
| This resource is referenced by | Bacon, Allan R., Daniel deB. Richter, Paul R. Bierman, and Dylan H. Rood (2012). Coupling meteoric 10Be with pedogenic losses of 9Be to improve soil residence time estimates on an ancient North American interfluve. Geology 40 (9): 847–850 http://dx.doi.org/10.1130/G33449.1 |
Credits
Funding Agencies
This resource was created using funding from the following sources:
| Agency Name | Award Title | Award Number |
|---|---|---|
| National Science Foundation | EAR-0632516 | |
| National Science Foundation | EAR-0819857 | |
| U.S. Department of Energy | DE-AC52-07NA27344 |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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