Evaluating Estuarine Sediment Provenance From Geochemical Patterns In Upper Chesapeake Bay

Russ, Emily; Palinkas, Cindy; Cornwell, Jeff

doi:10.1016/j.chemgeo.2019.119404

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i

Evaluating Estuarine Sediment Provenance From Geochemical Patterns In Upper Chesapeake Bay

2020
By Russ, Emily ; Palinkas, Cindy ; Cornwell, Jeff
Source: Chemical Geology, 533: 119404

[PDF-2.08 MB]

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Journal Title:

Chemical Geology
Personal Author:

Russ, Emily ; Palinkas, Cindy ; Cornwell, Jeff

Russ, Emily ; Palinkas, Cindy ; Cornwell, Jeff Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; Sea Grant

OAR (Oceanic and Atmospheric Research) ; Sea Grant Less -
Sea Grant Program:

MDU (Maryland Sea Grant)
Description:

Geochemical patterns in upper Chesapeake Bay sediments can reflect a variety of important processes. Spatial and down-core geochemical patterns are useful for understanding the underlying conservative (sediment provenance) and non-conservative (salinity, redox, anthropogenic influences) processes driving these patterns. Distinguishing conservative and non-conservative processes to quantify sediment sources will help develop management strategies to limit excess sedimentation in estuaries. In this study, elemental concentrations were measured via inductively coupled plasma mass spectroscopy (ICP-MS) and analyzed using principal component analysis. The sediment geochemistry data were then analyzed to evaluate contributions of Susquehanna River and shoreline erosion to bottom sediments in the upper Bay using a sediment-provenance analysis. Elements associated with aluminosilicate minerals, which were sensitive to grain-size changes, and rare earth elements, which were sensitive to salinity changes, explained the most variability in the dataset. Variability in heavy metal concentrations demonstrated decadal changes in anthropogenic inputs. The results from the sediment-provenance analysis indicated that the Susquehanna River is the dominant source of fine sediment in the upper Bay.
Keywords:

[+]

Geochemistry Sediments
Source:

Chemical Geology, 533: 119404
DOI:

https://doi.org/10.1016/j.chemgeo.2019.119404
Document Type:

Journal Article
Funding:

Grant no. NA14OAR4170090
Place as Subject:

Chesapeake Bay (Md. and Va.)
Rights Information:

Accepted Manuscript
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:c9fb2ed99149394129163c5a457511616a53868e96f7e5dfe698aaaa44965d62
Download URL:

https://repository.library.noaa.gov/view/noaa/41877/noaa_41877_DS1.pdf
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Evaluating Estuarine Sediment Provenance From Geochemical Patterns In Upper Chesapeake Bay

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