@article{136,
  author = {J. Kasbohm and B. Schoene and S.A. MacLennan and D.A.D. Evans and B.P. Weiss},
  title = {Paleogeography and high-precision geochronology of the Neoarchean Fortescue Group, Pilbara, Western Australia},
  abstract = {While rates of Phanerozoic plate movements and magnetic field reversals have been well studied, little is known about such phenomena on early Earth. The ca. 2.8{\textendash}2.7 Ga Fortescue Group on the Pilbara craton in Western Australia has been recognized as a well-preserved sequence of Archean rift volcanics thought to derive from a flood basalt province, and may have been moving rapidly across the globe at two different intervals in its depositional history. We present the results of a magnetostratigraphic study integrated with high-precision U-Pb ID-TIMS geochronology aiming to quantify rates of cratonic motion and provide a continuous time series for changes in Pilbara paleogeography during these two rapid intervals, at \~{}2.77 and 2.72 Ga. We provide six new or updated high-quality paleomagnetic poles for inclusion in databases tracking Precambrian cratonic motion. During the craton s largest geographic displacement at \~{}2.77 Ga, we resolve a minimum drift rate of 23 {\textpm} 20 cm/a if there was substantial rotation of the Pilbara craton along with translational motion, and a more rapid minimum estimate of 64 {\textpm} 23 cm/a if the motion was dominated by translation; these estimates exceed both Mesoarchean and most modern rates of plate motion. We provide a new high-precision U-Pb zircon age of 2721.23 {\textpm} 0.88/0.88/6.9 Ma for the Tumbiana Formation stromatolite colony, which developed as the Pilbara craton drifted from 51.5 {\textpm} 7.0{\textdegree} to 32.1 {\textpm} 5.7{\textdegree} paleolatitude. Although the Fortescue Group has been considered an early prototype of large igneous provinces, it was emplaced over a longer duration than its Phanerozoic counterparts and does not fit at least one definition of a large igneous province (LIP). But as a potential prototype of LIP magmatism, the Fortescue succession chronicles eruptive dynamics, rapid paleogeographic changes, and a series of robustly determined magnetic field reversals during the Neoarchean. {\textcopyright} 2023 Elsevier B.V.},
  year = {2023},
  journal = {Precambrian Research},
  volume = {394},
  publisher = {Elsevier B.V.},
  url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85162250482\&doi=10.1016\%2fj.precamres.2023.107114\&partnerID=40\&md5=a1dbab25b46672c0822bdc6ced54db11},
  doi = {10.1016/j.precamres.2023.107114},
  note = {cited By 0},
}