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An optimization method for paleomagnetic Euler pole analysis
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DOI：10.1016/j.cageo.2022.105150.png)
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Owing to the axial symmetry of the Earth's magnetic field, paleomagnetic data only directly record the latitudinal and azimuthal positions of crustal blocks in the past, and paleolongitude cannot be constrained. An ability to overcome this obstacle is thus of fundamental importance to paleogeographic reconstruction. Paleomagnetic Euler pole (PEP) analysis presents a unique means to recover such information, but prior implementations of the PEP method have incorporated subjective decisions into its execution, undercutting its fidelity and rigor. Here we present an optimization approach to PEP analysis that addresses some of these deficiencies-namely the objective identification of change-points and small-circle arcs that together approximate an apparent polar wander path. We elaborate on our novel methodology and conduct some experiments with synthetic data to demonstrate its performance. We furthermore present implementations of our methods both as adaptable, stand-alone scripts in Python and as a streamlined interactive workflow that can be operated through a web browser.
Keyword:
Paleomagnetism
Euler pole
Apparent polar wander path
Optimization
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4.4
论文数:
5.0K
被引数:
1.5W
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On Pole Position: Causes of Dispersion of the Paleomagnetic Poles Behind Apparent Polar Wander PathsOAAI
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