Technical Papers

Neutral mine drainage water-quality impacts from a form taconite mine

Abstract:

Surface waters at the site of a former Minnesota taconite mine were reported to have solute concentrations elevated with respect to water-quality standards. Waste rock and ore generated from past mining were primarily from open pit mining of the Biwabik Iron Formation (BIF). The BIF is a variably bedded iron formation composed of inter-bedded cherty and slaty iron silicate and iron carbonate rich beds. A geochemical characterization was conducted to identify potential constituents of interest (COI), facilitate understanding of mechanisms controlling their environmental behavior at the site, and guide future site activities. Primary COI were determined to be SO4, hardness (predominately from Mg), alkalinity, Fe, Mn, and Al. BIF waste rock from the Lower Slaty members appears to be the primary source for the identified COI. Mechanisms of release are primarily attributed to pyrite oxidation and subsequent neutralization by dissolution of mixed-composition (Ca-, Mg-, Fe-, Mn-bearing) siderite and ankerite.

Citation:

Hanna, B. “Neutral Mine Drainage Water-Quality Impacts from a Former Taconite Mine,” in Tailings and Mine Waste ’10, pp. 241-252. CRC Press, 2010.Hanna, B. “Neutral Mine Drainage Water-Quality Impacts from a Former Taconite Mine,” in Tailings and Mine Waste ’10, pp. 241-252. CRC Press, 2010.

Authors:

Braden Hanna

Link to Full Text:

Water Quality Impacts of Mine Drainage.pdf

Latest News
  • 3DEC 9 Officially Released ITASCA announces the release of 3DEC v9, an advanced three-dimensional, hybrid discontinuum and continuum modeling...
    Read More
  • A Big Hand of Applause for Our 2023 Summer Interns ITASCA Minneapolis would like to extend our sincerest thanks to our 2023 summer interns for...
    Read More
  • Itasca has announced the release of FLAC2D v9 Itasca has announced the release of FLAC2D v9, revolutionizing the way we analyze and predict...
    Read More

Upcoming Events
13 Mar
Getting Started with 3DEC
Objectives of the training: Understand the 3DEC numerical approach and the types of problems it can solveKnow how to manipulate the 3DE... Read More
8 Apr
3DEC In-Person Introductory Course
Live in-person introductory training course in Minneapolis, Minnesota. This course provides an overview of the capabilities and feature... Read More
15 Apr
FLAC3D In-Person Introductory Course
Live in-person introductory training course. This 3-day course provides general feature training addressing basic concepts and recommen... Read More