DataSheet1_Improvements to the Shaw-Type Absolute Palaeointensity Method.PDF
Palaeointensity information enables us to define the strength of Earth’s magnetic field over geological time, providing a window into Earth’s deep interior. The difficulties in acquiring reliable measurements are substantial, particularly from older rocks. Two of the most significant causes of experimental failure are laboratory induced alteration of the magnetic remanence carriers and effects relating to multidomain magnetic carriers. One method that has been claimed to overcome both of these problems is the Shaw method. Here we detail and evaluate the method, comparing various selection criteria in a controlled experiment performed on a large, non-ideal dataset of mainly Precambrian rocks. Monte Carlo analyses are used to determine an optimal set of selection criteria; the end result is a new, improved experimental protocol that lends itself very well to the automated Rapid 2G magnetometer system enabling experiments to be carried out expeditiously and with greater accuracy.
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Categories
- Solid Earth Sciences
- Climate Science
- Evolutionary Impacts of Climate Change
- Atmospheric Sciences not elsewhere classified
- Exploration Geochemistry
- Inorganic Geochemistry
- Isotope Geochemistry
- Organic Geochemistry
- Geochemistry not elsewhere classified
- Igneous and Metamorphic Petrology
- Ore Deposit Petrology
- Palaeontology (incl. Palynology)
- Structural Geology
- Tectonics
- Volcanology
- Geology not elsewhere classified
- Seismology and Seismic Exploration
- Glaciology
- Hydrogeology
- Natural Hazards
- Quaternary Environments
- Earth Sciences not elsewhere classified
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