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Hyperspectral reflectance in mineral exploration: example from the Northwest Zone of the Lemarchant VMS deposit, Newfoundland, Canada
Citation
Cloutier, J and Piercey, SJ, Hyperspectral reflectance in mineral exploration: example from the Northwest Zone of the Lemarchant VMS deposit, Newfoundland, Canada, 14th SGA biennal meeting proceedings, 20-23 August 2017, Quebec City, pp. 1127-1130. (2017) [Non Refereed Conference Paper]
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Official URL: https://numerique.banq.qc.ca/patrimoine/details/52...
Abstract
Hyperspectral reflectance spectroscopy has
been widely available for more than 25 years and is now
undertaken as a standard procedure by many exploration
and mining companies. The data collected is used to
characterize the mineralogy of alteration zones but is rarely
used in conjunction with geochemical datasets. In this
study, we integrate hyperspectral and whole rock
geochemical datasets acquired at the Northwest Zone of
the Lemarchant volcanogenic massive sulfide (VMS)
deposit in order to determine the dominant formation
processes and to establish new exploration parameters.
The mineralization at the Northwest Zone is hosted in
andesitic and dacitic rocks and exhibits intense
hydrothermal alteration (e.g., high CCPI, AI and Ba/Sr
lithogeochemical signatures) extending at least 300 m
along strike of the andesitic and dacitic units. The alteration
corridor has hyperspectral signatures that correlate with
phengitic white micas with 2200W longer than 2215nm, and
Mg-rich chlorites with 2250W shorter than 2252nm. The
integration of hyperspectral reflectance, geochemical
alteration proxies (i.e., AI, CCPI, Ba/Sr, NA2O) and mass
volume changes has documented specific alteration
processes responsible for the alteration (i.e., seawater
alteration versus silicification), which is not possible using
hyperspectral reflectance or geochemistry alone.
Item Details
Item Type: | Non Refereed Conference Paper |
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Keywords: | hyperspectral reflectance, Lemarchant deposit, VMS deposit, Newfoundland |
Research Division: | Earth Sciences |
Research Group: | Geology |
Research Field: | Resource geoscience |
Objective Division: | Mineral Resources (Excl. Energy Resources) |
Objective Group: | Mineral exploration |
Objective Field: | Copper ore exploration |
UTAS Author: | Cloutier, J (Mr Jonathan Cloutier) |
ID Code: | 142385 |
Year Published: | 2017 |
Deposited By: | CODES ARC |
Deposited On: | 2021-01-13 |
Last Modified: | 2021-08-25 |
Downloads: | 0 |
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