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partial thermoremanent magnetization
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partial thermoremanent magnetization

physics
Also known as: PTRM
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Partial thermoremanent magnetization (PTRM) is a type of remanent magnetism that occurs when a substance is cooled from a temperature below its Curie point to an even lower temperature, while in the presence of a magnetic field. Remanent magnetism, in general, is the permanent magnetism retained by rocks after an external magnetic field is removed. This property is crucial for paleomagnetic studies, providing insights into phenomena like polar wandering and continental drift.12

There are several types of remanent magnetization, including chemical remanent magnetization (CRM), depositional remanent magnetization (DRM), isothermal remanent magnetization (IRM), natural remanent magnetization (NRM), pressure remanent magnetization (PRM), thermoremanent magnetization (TRM), and viscous remanent magnetization (VRM). TRM is particularly significant as it is stable and widespread, found in both igneous and sedimentary rocks.12

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2 Britannica Sources
  1. rock - Types of remanent magnetization
  2. remanent magnetism

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