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Paleomagnetic contributions to the Klamath Mountains terrane puzzle-a new piece from the Ironside Mountain batholith, northern California

November 18, 2013

We obtained paleomagnetic samples from six sites within the Middle Jurassic Ironside Mountain batholith (~170 Ma), which constitutes the structurally lowest part of the Western Hayfork terrane, in the Klamath Mountains province of northern California and southern Oregon. Structural attitudes measured in the coeval Hayfork Bally Meta-andesite were used to correct paleomagnetic data from the batholith. Comparing the corrected paleomagnetic pole with a 170-Ma reference pole for North America indicates 73.5° ± 10.6° of clockwise rotation relative to the craton. Nearly one-half of this rotation may have occurred before the terrane accreted to the composite Klamath province at ~168 Ma. No latitudinal displacement of the batholith was detected.

Citation Information

Publication Year 2013
Title Paleomagnetic contributions to the Klamath Mountains terrane puzzle-a new piece from the Ironside Mountain batholith, northern California
DOI 10.1016/j.tecto.2013.09.007
Authors Edward A. Mankinen, C. Sherman Gromme, W. Porter Irwin
Publication Type Article
Publication Subtype Journal Article
Series Title Tectonophysics
Series Number
Index ID 70056175
Record Source USGS Publications Warehouse
USGS Organization Geology, Minerals, Energy and Geophysics Science Center