Laurentia's Grenville Loop: Tracking Rodinia Across the Mesoproterozoic to Neoproterozoic Boundary
Magnetics Information Consortium (MagIC) via YouTube
Overview
Syllabus
Intro
The well-dated Keweenawan Track mild post-emplacement thermal histories
Late Mesoproterozoic Laurentia paleogeography ~25 Myr of rifting and fast plate motion
No date, No rate
Previous age interpretation for the Jacobsville Formation
Field and radiometric constraints on Jacobsville deposition and deformation
Detrital zircon maximum deposition age constraints using CA-ID-TIMS
Age constraints on faulting from U-Pb dates on late kinematic fault breccia calcite
Field and geochronology constraints on Jacobsville deposition and deformation
Jacobsville paleomagnetism previous work
Siltstone and fine-grained sandstone beds in the Jacobsville Formation
Jacobsville paleomagnetism high resolution thermal demagnetization
Red bed paleomagnetism high-resolution thermal demagnetization
Positive Intraformational conglomerate test
Fold test provides age constraints
Inclination correction using the elongation/inclination method
Revisiting the Adirondack Highlands thermochronology
New geochronology data from the Adirondack Highlands
New thermochronology data from the Adirondack Highlands
Laurentia at the Center of Rodinia Supercontinent
Implication for the age of the Grenville Loop
Revisiting the Grenville poles Brown and McEnroe, 2012
Laurentia's slowdown after the onset of Grenvillian orogeny
Taught by
Magnetics Information Consortium (MagIC)