Thermal Resolution of Unblocking Temperatures (TROUT): A Method for “Unmixing” Multi‐Component Magnetizations

نویسندگان

چکیده

Some rocks contain multiple remanence “components,” each of which preserves a record different magnetic field. The temperature ranges over these components unblock can overlap, making it difficult to determine their directions. We present data analysis tool called Thermal Resolution Of Unblocking Temperatures (TROUT) that treats the process thermal demagnetization as function (or alternating field coercivity). TROUT models unblocking temperature/coercivity distributions in experiment, allowing overlap. be used find temperatures/coercivities paleomagnetic directions change and when two directional overlap resulting curved trajectories. When applied specimens given multi-component Thermoremanent Magnetizations (TRMs) laboratory, method estimates at partial TRMs were acquired within one step, even for with significant has numerous applications: knowing direction changes is useful experiments history specimen interest (e.g., emplacement pyroclastic deposits, re-heating archaeological artifacts, reconstruction cooling rates igneous bodies). ability whether single component or are demagnetizing choosing appropriate temperatures use paleodirection/intensity experiments. Finally, width range may inferring composition, grain size domain state mineral assemblages.

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ژورنال

عنوان ژورنال: Geochemistry Geophysics Geosystems

سال: 2023

ISSN: ['1525-2027']

DOI: https://doi.org/10.1029/2023gc010920