| dc.description.abstract | The Hemlo East property is located approximately 50 kilometres east of the
town of Marathon, Ontario and is situated within the Schreiber-Hemlo greenstone belt
of the Wawa-Abitibi Terrane of the Archean Superior Province. Lithologies within the
Hemlo East Property are broadly divided into mafic metavolcanic, felsic metavolcanic,
metasedimentary, intrusive and metaintrusive rocks. Stratigraphic continuity within
the study area is demonstrated by the large number of drill holes in the area. Rock
staining indicates that the K-feldspar present in felsic metavolcanic rocks in the
Gouda-Thor-Carroll area of the Hemlo East Property is a product of alteration likely
associated with base metal and gold mineralization.
New major and trace element, Sm-Nd isotope, and geochronology data are
presented for volcanic, plutonic, and metasedimentary rocks of the Hemlo East
property to investigate their origins. Positive to negative εNd (-1.14 to 2.15) for tholeiitic
basalts indicate that they were derived from depleted to moderately contaminated
sources. FI rhyolites with steep trace element patterns (La/Ybn = 16 to 44) and
fractionated HREE (Gd/Ybn = 2.1 to 7.5) are interpreted to have been derived from a
deep mantle source. Metasedimentary rocks are geochemically similar to felsic
metavolcanic rocks and are interpreted to be derived wholly, or in part, from a felsic
source. | en_US |
