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Swanson-Hysell-Group / Inclination_Shallowing

Quantifying inclination shallowing and representing flattening uncertainty in sedimentary paleomagnetic poles
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calculate empirical f factors from the Kent and Olsen 2008 paper #2

Closed Swanson-Hysell closed 1 year ago

Swanson-Hysell commented 2 years ago

There are different sedimentary units that can be compared to the CAMP mean and for which an empirical f factor can be estimated (rough comparison of the mean directions). How do these compare to the E/I method approach?

A related issue is are there any other empirical DRM vs. volcanics studies?

duserzym commented 2 years ago

https://doi.org/10.1016/j.epsl.2005.12.016 This paper on "New Early Cretaceous paleomagnetic data from volcanic and red beds of the eastern Qaidam Block and its implications for tectonics of Central Asia" uses both red beds and volcanics for paleomagnetic study. Their result shows the red beds appear to be overlapping with the volcanics in directional space. However looking at their orthogonal plot - their red bed demagnetizations are of very course steps and their moment resolutions are of e-4 emu - making the DRM component, which often is resolved between thermal demag steps between 670 and 685 degrees (with 1-2 degree intervals) not resolved in the plots. And some of the orthogonal plots give hints of shallowing..!