To: Yorikke who wrote (3516 ) 12/7/1999 7:15:00 AM From: 1st.mate Respond to of 4884
Author : Morris, T.F. Date : 1999. Title : Geochemical, heavy mineral and pebble lithology data, surficial sediment sampling program, Wawa region, northeastern Ontario. Publication : Open File Report , Ontario Geological Survey. Ministry of Natural Resources. Toronto. Issue : Page(s) : 74 p. Abstract : In 1990 and 1991, humus and "B" and "C" horizon till samples were collected as part of an overburden materials mapping and sampling program completed by the Ontario Geological Survey in the Michipicoten greenstone belt area, northeastern Ontario. Following the recovery of diamonds in modern alluvium in 1993, the Ontario Geological Survey conducted a modern alluvium sampling program in 1994 that included the area sampled in 1990 and 1991 and the Michipicoten River Valley. Within the river valley, humus and "B" and "C" horizon till samples were collected for geochemical analysis. Heavy mineral processing for kimberlite indicator minerals and gold was completed on till "C" horizon material and modern alluvium. Following the 1994 sampling program, additional sampling and overburden mapping was completed, to the east, in the Kinniwabi Lake area in 1996. Geochemical analysis was conducted on humus and till "B" and "C" horizon material. Heavy mineral processing for kimberlite indicator minerals, metamorphosed magmatic massive sulphide indicator minerals and gold grains was conducted on the till "C" horizon material and modern alluvium. Kimberlite indicator mineral data for the modern alluvium samples was reported for the 1994 Wawa-Michipicoten River and 1996 Kinniwabi Lake surveys. Previously, kimberlite indicator data from the 1996 survey has been reported. This report summarizes previously unpublished geochemical and heavy mineral data and makes recommendations for gold, base metal, rare-element pegmatite and kimberlite exploration targets. Further detailed work is required to assess the mineral potential of these areas. Orientation surveys, which define glacial dispersal characteristics, were completed in 1991 in the Black Lake, Miller Lake, Manitowik Lake, Wawa Lake, Island Gold Prospect and Highway 17 (north of Wawa) areas. These surveys aid exploration programs in tracing anomalous geochemical or heavy mineral signatures present in the overburden back to source. Key characteristics defined in these surveys include direction of ice flow, distance of dispersal, importance of topography and how the relative hardness of material controls the distance of material transport. Cluster of diamond exploration near Wawa