Natural Resources

Open File 023J/0396 - Geochemical Data from the Archean Ashuanipi Complex, Western Labrador (NTS Map Sheets 23J/02, 03, 04, 05 06, 07, 10, 11 and 14)

T.S. van Nostrand

St. John's, Newfoundland, December, 2017

Summary

This Open File release consists of whole-rock geochemistry of 112 samples collected from new mineral indications and previously known (MODS) occurrences in the Archean Ashuanipi Complex of western Labrador. The occurrences are located on NTS map sheets 23J/02, 03, 04, 05, 06, 07, 10, 11 and 14 and were sampled during a regional bedrock-mapping project of the region carried out in 2013, 2015 and 2016. Geochemical analyses are reported for 90 samples of paragneiss, oxide-facies iron formation, gabbro, diorite, pyroxenite, tonalite gneiss, diatexite, granite, pegmatite and quartz veins that host indications of sulphide mineralization. Analyses are also reported for 22 samples of quartz syenite to alkali feldspar granite pegmatite, diatexite and late granite that recorded anomalous radioactive signatures with scintillometers. Several assays from sulphide-bearing samples indicate elevated gold (Au), silver (Ag), arsenic (As), copper (Cu), lead (Pb), zinc (Zn) and molybdenum (Mo). Assays from anomalous radioactive samples indicate elevated thorium (Th), uranium (U), zirconium (Zr) and rare-earth element (REE) contents.

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