منابع مشابه
Is the African cratonic lithosphere wet or dry?
Thick continental lithosphere (tectosphere) beneath African cratons has been stable for ~2.5 b.y. despite its mechanical interaction with sublithospheric mantle. Water is known to have signifi cant infl uence on mechanical stiffness, and the depletion of water is often considered to be a key to preserving the thick lithosphere. Although water-rich environments indicated by the present water con...
متن کاملThe Oceanic Lithosphere
1. Background: Mid-Ocean Ridges and the oceanic lithosphere 2. Methods of study of the oceanic lithosphere 3. Components of the oceanic lithosphere and their physical properties 4. Structure of the oceanic lithosphere 4.1 ‘Homogeneous’ lithosphere 4.2 ‘Heterogeneous’ lithosphere 4.3 Hot Spot Influenced Lithosphere 4.4.Continent to Ocean Transition 5. Forming the oceanic lithosphere at the ridge...
متن کاملLithosphere, Asthenosphere, and Perisphere
"Lithosphere" is a mechanical concept implying strength and relative permanence. Unfortunately, the term has also been applied to the surface thermal boundary layer (TBL) and a shallow enriched geochemical reservoir, features having nothing to do with strength. The "strong" lithosphere is about one half the thickness of the TBL. The bottom of the elastic plate, the maximum depths of midplate an...
متن کاملUnstable extension of Enceladus’ lithosphere
Regions near Enceladus’ equator, Sarandib and Diyar Planitia, contain extensive sets of parallel ridges and troughs that may be diagnostic of the region’s formation conditions. We present photoclinometry profiles across these ridges and troughs, which indicate that they are periodic, low-slope features with dominant wavelengths of 3 to 4 km and amplitudes between 100 and 400 m. The morphology o...
متن کاملThe lithosphere under stress
I discuss thermal, rheological and compositional definitions of the Earth’s lithosphere and describe the data that can be brought to bear in refining these definitions. Models of the behaviour of the lithosphere are useful in describing such diverse effects as continental basin subsidence, the flexural response to imposed loads such as seamounts or sediment accumulations, the partial melting of...
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ژورنال
عنوان ژورنال: Nature
سال: 1992
ISSN: 0028-0836,1476-4687
DOI: 10.1038/358020a0