CALL FOR PROPOSALS:

ORGANIZERS

  • Harvey Thorleifson, Chair
    Minnesota Geological Survey
  • Carrie Jennings, Vice Chair
    Minnesota Geological Survey
  • David Bush, Technical Program Chair
    University of West Georgia
  • Jim Miller, Field Trip Chair
    University of Minnesota Duluth
  • Curtis M. Hudak, Sponsorship Chair
    Foth Infrastructure & Environment, LLC

 

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Paper No. 7
Presentation Time: 9:30 AM

ARSENIC RELEASE ZONE CHARACTERIZATION, GOTRA, NADIA DISTRICT, WEST BENGAL, INDIA


BECKIE, Roger D.1, PAL, Taraknath2, DESBARATS, Alexander J.3, MUKHERJEE, Pradip2 and KOENIG, Cassandra E.M.4, (1)Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada, (2)Geological Survey of India, 15 A & B Kyd Street, Kolkata, 700 016, India, (3)Geological Survey of Canada, 601 Booth Street, Ottawa, ON K1A0E8, Canada, (4)Earth and Ocean Sciences, University of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4, Canada, rbeckie@eos.ubc.ca

Since 2004, The Geological Survey of India , The Geological Survey of Canada and the University of British Columbia have been jointly investigating naturally occurring arsenic in groundwater at a field site in the village of Gotra, West Bengal, India, which is situated above an in-filled channel. Early results showed that within the village high (> 50 ppb) and low arsenic groundwater zones are separated by a transition zone of less than 30 m. Shallow wells completed in the low-permeability soft, gray silty-clay channel fill within 5 m from the edge of a pond show unambiguously that the arsenic is released within the channel fill and is moving vertically downward into the aquifer sands where most domestic wells are completed. Water proximal to another pond away from the channel is not associated with high arsenic.

Session No. 84

T84. Recent Advances in Studies of Dissolved Arsenic and Other Metals in Global Hydrologic Systems I
Monday, 10 October 2011: 8:00 AM-12:00 PM
Room M100FG (Minneapolis Convention Center)
Geological Society of America Abstracts with Programs. Vol. 43, No. 5, p.221
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