Kimberlite indicator minerals (KIM) results for reconnaissance-scale till sampling between New Liskeard and Marten River were released as GSC Open File 4086. The report provides information on the regional background content of KIM in till, the nature of KIM signatures in till just down-ice of known kimberlites, and the distribution of KIM anomalies that warrant further investigation. Mg-ilmenite is the most abundant and widespread KIM in the till in the study area. Chromite occurs in approximately the same till samples that contain Mg-ilmenite, but is generally present in lower abundances. Pyrope in till is approximately half as abundant as Mg-ilmenite. Cr-diopside is similar in abundance to pyrope and is present in almost every sample. Anomalous concentrations of kimberlite indicator minerals (see anomaly map) in till occur: on the Red Squirrel Road; near Temagami; along Highway 11 in the central part of the study area; on the east side of Lake Timiskaming; and on the Rabbit Lake forest access road. Some of these anomalies coincide with anomalies identified by the OGS in their recent stream sediment survey (Allan, 2001). Additional till sampling combined with geophysics should be conducted to determine the extent of the KIM anomalies and trace them to their bedrock source, with a sample spacing that is much smaller (<500 m) than used in this reconnaissance survey.

Striation data for the region between New Liskeard and Marten River were compiled and released as GSC Open File 3385 to determine the main ice flow phases that could have transported kimberlite debris. Three phases of flow (see ice flow map) are associated with erosion, transportation and deposition of till in the region. The main carriers of glacial debris, however, were the two oldest ice flows to the southwest and south. A large dispersal train of Paleozoic limestone derived from upper Lake Timiskaming trends south-southwest across the area, but has been truncated in its proximal part (Latchford area) by the last southeast ice flow indicating that in this area, southeast ice flow was a major carrier of debris. These situations have to be taken into consideration in the interpretation of dispersal trains formed by the three major ice flows.

Summary of kimberlite indicator mineral anomalies in till.

Regional ice flow patterns.

Field Work Summer 2000 Photos

	Small hummock of locally derived stony sandy till near Portage Bay on Bay Lake (NTS 31M/5). Till samples were collected from several sites such as these as part of the GSC regional till sampling program in July, 2000.
	Thick silty sand till exposed during construction to widen Highway 11 during the summer of 2000, near North Milne Lake (NTS 31L/13). Till samples were collected from several of these fresh roadcuts as part of the GSC regional till sampling program in July, 2000.
	Cross-striated outcrop of metasedimentary rocks on the north side of the Montreal River showing evidence of two phases of ice flow: 1) older flow towards 230°, and 2) younger flow towards 205° (NTS 31M/5).
	Broad flat expanses of striated metasedimentary rocks are well exposed on the Roosevelt Forest Access Road, east of Highway 11. Bedrock at this site is striated at 165° (NTS 31M/5).
	Cross-striated bedrock showing evidence of three phases of ice flow is well exposed on the access road to the Temagami Fire Tower: 1) 255°, 2) 180°, and 3) 155° (NTS 31M/4).