Middlebury

 

Presentation Title: New England's Arsenic Problem: An Investigation of Metamorphic Grade on Arsenic Concentration in Taconic Shales

Section: Poster Session Group 1 #10

Location: , Great Hall

Date & Time: Friday, April 19, 2013 - 10:30am - 11:15am

Abstract:

Bedrock wells supply the majority of drinking water for rural areas in Vermont and New York, and the health hazards of drinking arsenic contaminated water are numerous and severe. Arsenic is a naturally occurring element within the earth's crust, and its relative solubility allows it to move from bedrock to groundwater with relative ease. Earlier studies indicate that increasing metamorphic grade may correlate with decreased arsenic concentrations in metamorphosed clay-rich sediments. Within my study area, metamorphic grade increases from west to east, so I hypothesized that the least metamorphosed, westernmost rock units should contain the highest concentration of arsenic, and higher-grade units to the east should contain a lower concentration of this element.  This hypothesis was supported by mineralogical and geochemical data, with a resulting mean As concentration of 26.9 ppm in the lower-grade sample set, and 13.8 ppm for higher-grade samples.

Type of Presentation: Individual poster

Oral presenters
Presentation Area: Geology

Presentation Topic: NA

Arts presenters
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Class Project
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Presenter Information
Presenter(s): Studwell, Sarah Rhoten
Major(s): Environmental Geology
Class Year(s): 2013

Sponsor(s): West, David P. Jr., Ryan, Peter Crowley
Dept(s): Geology

Moderator: ,