Canada Pine Point

Mississippi Valley type Lead Zinc deposits Pine Point, Northwest Territories, Canada Gravity or compaction flow of brines from deep sedimentary basins Leaching from sedimentary source rocks, transport, and deposition due to declining temperatures and and possibly changing Eh PH... 

Garven, G., 1985. The role of regional fluid flow in the genesis of the Pine Point Deposit, Western Canada Sedimentary Basin. Economic Geology, Vol. 80, pp. 307-324 Garven, G., 1989. A hydrogeologic model for the formation of the giant oil sands deposits of the Western Canada Sedimentary Basin. American Journal of Science, Vol. 289, pp. 105-166... 

Analyses of fluid inclusions in saddle dolomite were first reported for the Pine Point lead-zinc deposit in western Canada (Roedder, 1968), but it was not until the late 1980s that fluid-inclusion analysis was widely applied to the study of carbonate cements. 

Roedder, E. (1968) Temperature, salinity, and origin of the ore-forming fluids at Pine Point, Northwest Territories, Canada, from fluid inclusion studies. Econ. Geol., 63, 439-450. 

The first and fairly obvious point to be made is that acute effects, e.g. plant death, necrosis, collapsed interveinal areas of broad leaves, loss of pine needles, are easiest to detect and therefore more is understood of the mechanisms involved. Most of the established cases of acute SO2 effects have occurred to trees and other vegetation close to or downwind of high level SO2 emitters, such as the well known Sudbury smelter in Canada. The incidence of such high atmospheric concentrations in the EEC is relatively limited, but because the damage mechanisms involving high concentrations are more easily studied in laboratory experiments, they have received more research attention. 

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