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If a rock is later re-heated (as a result of burial, for example), part or all of the TRM can be replaced by a new remanence. If it is only part of the remanence, it is known as partial thermoremanent magnetization (pTRM). Because numerous experiments have been done modeling different ways of acquiring remanence, pTRM can have other meanings.
Néel relaxation theory is a theory developed by Louis Néel in 1949 [1] to explain time-dependent magnetic phenomena known as magnetic viscosity [clarification needed].It is also called Néel-Arrhenius theory, after the Arrhenius equation, and Néel-Brown theory after a more rigorous derivation by William Fuller Brown, Jr. [2] Néel used his theory to develop a model of thermoremanent ...
The magnetization remains in the same state as the rock is cooled to room temperature and becomes a thermoremanent magnetization. Chemical (or crystallization) remanent magnetization (CRM) [ edit ]
Thermoremanent magnetization (TRM) is acquired during cooling through the Curie temperature of the magnetic minerals and is the best source of information on the past Earth's field. Magnetization formed by phase change, chemical action or growth of crystals at low temperature is called chemical remanent magnetization.
Thermoremanent magnetization is the main source of the magnetic anomalies around mid-ocean ridges. As the seafloor spreads, magma wells up from the mantle , cools to form new basaltic crust on both sides of the ridge, and is carried away from it by seafloor spreading.
Three women and a dog were killed at a Missouri home on Sunday and a suspect has been charged with murder, officials said. The women were found dead at a home in Kansas City after someone ...
The source of these anomalies is primarily permanent magnetization carried by titanomagnetite minerals in basalt and gabbros. They are magnetized when ocean crust is formed at the ridge. As magma rises to the surface and cools, the rock acquires a thermoremanent magnetization in the direction of the field.
Created Date: 8/30/2012 4:52:52 PM