Craton Destruction 1: Cratonic Keel Delamination Along a Weak Midlithospheric Discontinuity Layer
نویسندگان
چکیده
منابع مشابه
Mantle flow deflected by interactions between subducted slabs and cratonic keels
Oceanic lithosphere is rapidly recycled into the mantle through subduction, an important part of the dynamic evolution of the Earth. Cratonic continental lithosphere, however, can exist for billions of years, moving coherently with the tectonic plates. At the Caribbean–South American Plate margin, a complex subduction system and continental transform fault is adjacent to the South American crat...
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Early Cretaceous alkaline picrites and high-magnesium basalts from the North China craton provide evidence for recycling of continental lithosphere by density foundering. Both the picrites and basalts contain xenocrystic olivines with high Fo92-93 and low CaO (<0.10%), consistent with the lavas’ derivation from, or interaction with Archean mantle lithosphere. Most importantly, both the picritic...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 2018
ISSN: 2169-9313
DOI: 10.1029/2017jb015372