Project Metadata Quality Assurance + Control Data Archiving

Geochemical Mobility Of Metals In Surface Sediments: Influence Of Sediment Diagenesis (Sources)

Objectives being Investigated
1. To establish trace metal deposition chronologies in Boreal Shield lakes exposed to high (Rouyn-Noranda region), medium (Haute-Mauricie) and low (Sept-Iles, Manicouagan) levels of atmospheric pollution.
2. To determine to what extent and under what circumstances lake sediments can provide useful historical records of trace metal loading from the atmosphere.
3. To determine in which cases specific sedimentary metal profiles (Ag, As, Cd, Cu, Hg, Ni, Pb, Pd, Pt, Rh, Zn) can be interpreted as historical records of trace metal pollution from human activities.
4. To use stable Pb isotopes to identify and quantify the sources of atmospheric Pb to lake sediments and to determine sources of Pb for aquatic organisms.

Study/Sampling Design
A. Comparison of sediment metal profiles between sites exposed to elevated atmospheric deposition of anthropogenic metals to those obtained in remote sites receiving negligible amounts of airborne metals.
B. Measurement of metal concentration gradients in porewaters coupled to estimates of chemical speciation and diagenetic modelling.

Location of Field Site(s)

Site	Latitude N (D M.mm)	Longitude W (D M.mm)
High (Rouyn-Noranda)	48° 11.00’	79° 09.55’
High (Rouyn-Noranda)	48° 28.27’	78° 49.91’
High (Rouyn-Noranda)	48° 28.48’	78° 48.88’
Medium (Haute-Mauricie)	47° 59.77’	75° 25.17’
Medium (Haute-Mauricie)	47° 59.33’	75° 24.67’
Medium (Haute-Mauricie)	47° 59.30’	74° 32.11’
Medium (Haute-Mauricie)	48° 54.43’	74° 31.63’
Medium (Haute-Mauricie)	48° 52.43’	74° 30.97’
Low 1 (Sept_Îles)	50° 52.85’	62° 29.50’
Low 1 (Sept_Îles)	50° 39.30’	62° 39.47’
Low 1 (Sept_Îles)	50° 38.22’	62° 22.50’
Low 2 (Manicouagan)	51° 30.63’	68° 27.44’
Low 2 (Manicouagan)	51° 28.92’	68° 25.66’
Low 2 (Manicouagan)	51° 32.53’	68° 51.81’

Biota Studied

Species
--- none provided ---

Metals, etc. Quantified
--- none provided ---

Biological Endpoint(s)
--- none provided ---

Physical Material(s) Studied

Medium/Media
Sediment, Sediment porewater, Lakewater

Metals, etc. Quantified
Ag, Al, As, Cd, Cu, Fe, Hg, Mn, Ni, Pd, Pb, Pt, Rh, Ti, Zn

Bibliographic References on-file with Secretariat: No

Data Available: No

Data Archived with MITHE-SN: No

Collaborators