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Volcanic activity and changes in Earth's mantle were key to rise of atmospheric oxygen（图）
Volcanic activity changes Earth mantle were key rise atmospheric oxygen
2020/6/19
Oxygen first accumulated in the Earth's atmosphere about 2.4 billion years ago, during the Great Oxidation Event. A long-standing puzzle has been that geologic clues suggest early bacteria were photos...
Regional Flow in the Lower Crust and Upper Mantle under the Southeastern Tibetan Plateau
Regional Flow Channel Flow Crustal Deformation Deep and Large Suture
2013/3/7
Seismic tomography reveals an “R-shape” regional flow constrained between the depths of 50 to 80 km in the Southeastern Tibetan Plateau (STP) which demonstrates some of the differences revealed by the...
Different Degrees of Partial Melting of the Enriched Mantle Source for Plio−Quaternary Basic Volcanism, Toprakkale (Osmaniye) Region, Southern Turkey
earth siences toprakkale features
2011/3/22
The Toprakkale (Osmaniye) region, located in the Yumurtalık fault zone in southern Turkey, contains Quaternary volcanic rocks, shown by their mineralogical and petrographical features to be alkal...
Modelling of interaction between a snow mantle and a flexible structure using a discrete element method
a snow mantle a flexible structure a discrete element method
2009/12/9
The search of improvement of protective techniques against natural phenomena such as snow avalanches continues to use classic methods for calculating flexible structures. This paper deals with a new m...