FT02

Iron oxide and alkali alteration, skarn and epithermal mineralising systems of the Grenville Province, Canada – FT02 – SOLD OUT

Leaders: Louise Corriveau (Geological Survey of Canada), Olivier Blein (Bureau de Recherches Géologiques et Minières), Anne-Laure Bonnet (École Polytechnique de Montréal)
Main contact: louise.corriveau@canada.ca
Description: This trip will visit iron oxide, skarn, alkali and epithermal alteration zones and associated IOCG and affiliated mineralisation within the Bondy gneiss complex of the southwestern Grenville Province (Québec). Field attributes of this metasomatic system metamorphosed to granulite facies markedly contrast with non metamorphosed analog, the most significant difference being the development of widespread garnetites at the expense of magnetite-rich alteration types. An emphasis will be placed on the genetic linkages amongst the varied alteration types and styles of mineralisation, and the field protocols for the identification and exploration of such metamorphosed hydrothermal systems. Additional stops will provide an overview of the Grenvillian and pre-Grenvillian tectono-magmatic evolution of the region and the rheological contrast across its different domains as recorded by styles of magma emplacement and extent of deformation of dyke swarms.
Dates: August 15th to August 18th, 2017
Starting Point: Québec City, Québec, Canada
* Early departure from Québec City on August 15th. Participants must travel to Québec City before.
Ending Point: Québec City, Québec, Canada
* Late arrival in Québec City on August 18th
Participants: 15 participants maximum
Cost: $ 1000.00 CAD
* Includes ground transportation for the entire trip from Québec to field trip sites (round trip), accommodation, meals, and field trip guidebook.
Tentative itinerary

Day Topic/Site visited
August 15 Travel from Québec to Notre-Dame-du-Laus
Metasedimentary belt and graphite mineralisation north of Grenville, Quebec (Grenville Province toponym).
August 16 The Bondy gneiss complex— an iron-oxide and related alkali-calcic alteration and mineralisation system and its epithermal cap hosted in 1.35 Ga volcanic rocks and metamorphosed at granulite facies at 1.2 Ga (Elzevirian orogeny); Geon 11 mafic dyke (Chevreuil suite); Geon 10 Rivard minette dyke (Kensington-Skootamata K-alkaline suite) and its ultramafic, mafic and gneissic xenoliths.
August 17 Bondy gneiss complex and mafic dykes, vertically layered mafic intrusion.
August 18 1.165 Ga syntectonic magma emplacement (Chevreuil suite; Shawinigan orogeny) within the quartzite domain of the Central Metasedimentary Belt.
Travel back from Notre-Dame-du-Laus to Québec
Lectures

Day Lecture Topic
August 15 PM Alteration vectors to metamorphosed hydrothermal systems in gneissic terranes: concepts, modeling and mapping protocols – Bonnet, Corriveau and collaborators
The 1.35 Ga volcano-plutonic Bondy gneiss complex, its regional context, iron-oxide and related alkali-calcic alteration system and epithermal cap – Corriveau, Blein and collaborators
Geochemical overview of the Bondy gneiss complex – Blein, Corriveau and collaborators
* Participants must provide proof of insurance coverage valid in Canada prior to participation in the field trip.
** All participants must sign a liability waiver form that will be provided by SGA prior to participation in the field trip.