<p> The McBean Mine is a small gold producer located along
the Larder Lake Break. Ore from the open pit consists of
massive and gneissic syenite. The highest go I d grades come
from highly carbonitized syenitic rocks with abundant fine
grained, euhedral pyrite. Petrographic observation shows
gold to be found as inclusions in pyrite, platings on pyrite
and as free grains in the gangue. XRD analyses show the
major carbonate type to be dolomite. In addition to
dolomite, minor amounts of calcite are found in auriferous
syenitic rocks. SEM microscopy shows carbonate composition
to vary with rock types and grain location. Geochemical
studies show a high intensity of carbonate alteration and the
association of gold with tungsten and uranium. Auriferous
syenites were determined to have elevated HREE element
abundances compared with unaltered syenite. The mine is
therefore characterized by extensive hydrothermal carbonate
alteration related to the Larder Lake Break. </p> / Thesis / Bachelor of Science (BSc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/19533 |
| Date | 04 1900 |
| Creators | Bell, Cameron |
| Contributors | Crocket, J. H., Geology |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
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