CCZO -- Soil Geochemistry -- Calhoun 70m deep well -- (2010-2010)


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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).

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Resource Level Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas, Calhoun 70m deep well
Longitude
-81.7238°
Latitude
34.6069°

Temporal

Start Date:
End Date:

Content

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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.

References

Related Resources

The content of this resource serves as the data for: 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

Bacon, A. R., D. d. Richter, P. R. Bierman, D. H. Rood (2020). CCZO -- Soil Geochemistry -- Calhoun 70m deep well -- (2010-2010), HydroShare, http://www.hydroshare.org/resource/e0ff49ca7eef40f282c74a396bf5a903

This resource is shared under the Creative Commons Attribution CC BY.

 http://creativecommons.org/licenses/by/4.0/
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