Geoscience

Geological Survey Activity Tracker

Province-wide projects

Granitoids in Manitoba: petrogenesis and metallogeny

Project Information

Principal investigators:
X.M. (Eric) Yang

Partnered with:
--

Location:
Within Manitoba

 

Project Description

Main objectives:

This project was initiated in 2014 to identify petrogenetic types of granitoids in diverse terranes, domains and belts in Manitoba, and to investigate their geodynamic settings and mineralization potential. It will create a GIS-based database dealing with their field relations, petrography, lithogeochemistry, and geochronology and relationships to Cu-Au-Mo, Sn-W, and rare metals mineralization.

Methodology:

Methods include geological mapping, petrographic analysis, mineral chemistry, lithogeochemistry, Nd isotopes, geochronology (U-Pb TIMS), GIS compilation and analysis.

  • Petrogenetic types of granitoids can be constrained by field relations, magnetic susceptibility, mineral assemblages, mineral chemistry, and geochemical compositions.
  • Geochemical processes of granitoid magmas and their sources will be investigated by using lithogeochemistry and Nd isotopes supported by precise U-Pb zircon age determination.
  • The emplacement conditions of granitoid intrusions are assessed by Al-in-hornblende geobarometer and zircon-saturation geothermometer aided by petrographic analysis.
  • Geodynamic settings of granitoids and their potential for various mineralization are investigated by multidisciplinary approaches using all available geoscientific data to discern the temporal and spatial distributions of granitoids in Manitoba, and the roles they played in the amalgamation of different terranes, domains, and belts over geological times.

 

Benefits:

The project provides fundamental geoscientific information of granitoids in Manitoba, which assists in improving understanding geodynamic evolution, juxtaposition of different terranes, and crustal growth. The evaluation of potential for mineralization associated with different types of granitoids and their roles played in genesis of orogenic gold would benefit mineral exploration targeting.

 

Plans for fiscal year 2017-2018:

  • Undertake fieldwork in Thompson nickel belt in late July to early August
  • Complete petrographic, geochemical and mineralogical data collection
  • Compile old and new data
  • Report of Activities and poster session, map in November
  • Study of ore-forming system associated with granitoids

 

Completed outputs:

2016-2017

Yang, X.M. 2016: Granitoid rocks in north-central Manitoba: preliminary results of reconnaissance mapping and sampling; in Report of Activities 2016, Manitoba Growth, Enterprise and Trade, Manitoba Geological Survey, p. 115–125. 

Yang, X.M. 2016: Petrogenetic types, tectonic settings and mineral potential of granitoids in north-central Manitoba: evidence from reconnaissance mapping, geological sampling and lithogeochemistry; Manitoba Growth, Enterprise and Trade, Manitoba Geological Survey, Manitoba Mining and Minerals Convention 2016, Winnipeg, Manitoba, November 16–18, 2016, poster presentation.

2015-2016

Yang, X.M. and Beaumont-Smith, C.J. 2015: Granitoid rocks in the Lynn Lake region, northwestern Manitoba: preliminary results of reconnaissance mapping and sampling; in Report of Activities 2015, Manitoba Mineral Resources, Manitoba Geological Survey, p. 68–78.

Yang, X.M. and Beaumont-Smith, C.J. 2015: Petrogenetic types, tectonic settings, and mineral potential of granitoids in the Lynn Lake region, northwestern Manitoba: evidence from reconnaissance mapping, geological sampling and lithogeochemistry; Manitoba Mineral Resources, Manitoba Geological Survey, Manitoba Mining and Minerals Convention 2015, Winnipeg, Manitoba, November 18–20, 2015, poster presentation.

2014-2015

Yang, X.M. 2014: Granitoid rocks in southeastern Manitoba: preliminary results of reconnaissance mapping and sampling; in Report of Activities 2014, Manitoba Mineral Resources, Manitoba Geological Survey, p. 49–63.

Yang, X.M. 2014: Petrogenetic types, tectonic settings, and mineral potential of granitoids in southeastern Manitoba: evidence from reconnaissance mapping and geological sampling; Manitoba Mineral Resources, Manitoba Geological Survey, Manitoba Mining and Minerals Convention 2014, Winnipeg, Manitoba, November 19–21, 2014, poster presentation.

Yang, X.M. and Gilbert, H.P. 2014: Archean tonalite-trondhjemite-granodiorite (TTG) suite in the Bird River greenstone belt, southeastern Manitoba: lithogeochemical characteristics, geodynamic evolution, and potential for porphyry Cu-(Au) mineralization [abstract]; Geological Association of Canada–Mineralogical Association of Canada, Joint Annual Meeting, Fredericton, New Brunswick, May 21–23, 2014, Program with Abstracts, p. 294.

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