Onset of new, progressive crustal growth in the central Slave craton at 3.55 Ga

J. R. Reimink, D. G. Pearson, S. B. Shirey, R. W. Carlson, J. W.F. Ketchum

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Ancient rock samples are limited, hindering the investigation of the processes operative on the Earth early in its history. Here we present a detailed study of well-exposed crustal remnants in the central Slave craton that formed over a 1 billion year magmatic history. The tonalitic-granodioritic gneisses analysed here are broadly comparable to common suites of rocks found in Archean cratons globally. Zircon Hf isotope data allow us to identify a major change positive eHf starting at ~3.55 Ga. The crust production processes and spatial distribution of isotopic compositions imply variable interaction with older crust, similar to the relationships seen in modern tectonic settings; specifcally, long-lived plate margins. A majority of the Slave craton might have been formed by a similar mechanism.

Original languageEnglish (US)
Pages (from-to)8-13
Number of pages6
JournalGeochemical Perspectives Letters
StatePublished - 2019

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Geology
  • Geochemistry and Petrology


Dive into the research topics of 'Onset of new, progressive crustal growth in the central Slave craton at 3.55 Ga'. Together they form a unique fingerprint.

Cite this