منابع مشابه
Planetary magnetism
M a g n e t i c f i e l d s a r e u b i q u i t o u s i n t h e U n i v e r s e b e c a u s e o f t h e a b s e n c e (o r r a r i t y ) o f f r e e m a g n e t i c m o n o p o l e s . However , t h e l a r g e s c a l e c o n c e n t r a t i o n of m a g n e t i c f l u x i n an e s s e n t i a l l y n o n f e r r o m a g n e t i c body s u c h a s t h e E a r t h , r e q u i r e s a n o n c o...
متن کاملNoncollinear Magnetism
Recently, a great deal of effort has been focused on developing the so called fully unconstrained approach to noncollinear magnetism. This approach allows the magnetization density within a material to be calculated as a continuous vector variable of position, as opposed to using the atomic moment approximation (AMA) where a fixed quantization direction is assumed for a volumefilling sphere s...
متن کاملEnvironmental Magnetism of Oligocene - Miocene Glaciomarine Strata from CRP-2/2A, Victoria Land Basin, Antarctica
Analysis of the environmental magnetic properties of the 624.15-m CRP-2/2A core, from McMurdo Sound, Antarctica, suggests that the core can be divided into three intervals, based on the nature and abundance of the magnetic minerals in the sedimentary sequence. These variations in magnetic parameters do not appear to be directly related to lithological variations in the core. Above 270 metres be...
متن کاملEnvironmental magnetism and application in the continental shelf sediments of India.
Mineral magnetic and geochemical analyses were carried out on surface sediments from the continental shelf of India. The purpose of this study is to examine the environmental assessment of heavy metal concentrations and its impact in the coastal environment using magnetic techniques and to gain an understanding on the factors controlling metal concentrations and distributions in the east and we...
متن کاملWhat do the HIRM and S-ratio really measure in environmental magnetism?
[1] The ‘‘hard’’ isothermal remanent magnetization (HIRM) and the S-ratio are widely used in environmental magnetism to quantify the absolute and relative concentrations, respectively, of antiferromagnetic minerals (hematite and goethite) in mineral mixtures. We demonstrate that synthetic Al-substituted hematite and goethite exhibit a wide range of coercivities, which significantly influences t...
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ژورنال
عنوان ژورنال: PAGES news
سال: 2003
ISSN: 1563-0803,1563-0803
DOI: 10.22498/pages.11.2-3.34