Geology of the Acasta Gneiss Complex: Decoding of early earth evolution

Regions: North Slave Region

Tags: physical sciences, geology, rock, acasta gneiss

Principal Investigator: Komiya, Tsuyoshi (1)
Licence Number: 15691
Organization: The University of Tokyo
Licenced Year(s): 2015
Issued: Jun 18, 2015
Project Team: Akira Ishikawa (geology, The University of Tokyo), Shinji Yamamoto (geology, The University of Tokyo), D. Graham Pearson (geochemistry, University of Alberta), Pedro Waterton (geochemistry, University of Alberta), Keiko Koshida (geology, The University of Tokyo), Ayano Ogawa (geology, The University of Tokyo), Shogo Aoki (geology, The University of Tokyo), Takayuki Tashiro (geology, The University of Tokyo)

Objective(s): To conduct a geological survey and rock sampling in the Acasta Gneiss Complex to investigate evolution of the early earth.

Project Description: The objectives are to conduct a geological survey and rock sampling in the Acasta Gneiss Complex to investigate evolution of the early earth. The Acasta Gneiss is the oldest rock in the world, and uniquely records the early earth. The Acasta Gneiss has many generations and a complex history including not only the magmatic formation with different ages but also deformations. Comprehensive works on geology, igneous and metamorphic petrology and geochemistry are necessary in order to collect vestiges of early earth. The research team will make a geological map in the Acasta Gneiss Complex to establish the field occurrence of mafic enclaves.

The research team will walk around the Acasta Gneiss Complex, 5 km x 5 km area and collect rock samples for laboratory research of geochemistry, petrology and geochronology. The team will use hand held hammers. The use of the hand hammers held minimizes damage to nature.

The research team will send thesis and reports as well as academic papers to communities. Two PhD students are studying the geology and geochemistry of the Acasta Gneiss Complex and will report the results in academic journals.

The fieldwork for this study will be conducted from August 6, 2015 to August 31, 2015.