地质学报2024，Vol.98Issue(3)：653-661,9.DOI:10.19762/j.cnki.dizhixuebao.2024040
超级地幔树对全球构造的控制作用
Control of super mantle trees over globe tectonics
摘要
Abstract
Jason and Tuzo super mantle plumes together resemble a banyan tree growing on the core-mantle boundary(CMB)with a"root"on top of the Earth's outer core,"trunk"(1600～2890 km),"crown"(110～1600 km),and"branches"(above 110 km)and are thus termed"super mantle trees"to reflect the integrity of low-shear-wave-velocity anomalies in the mantle and highlight their role in the connect the core and crust and their effects of global tectonics during Earth's evolution.Here,we show that a mantle plume is a part or"branch"of a super mantle tree.The planar distribution resembles the global plate contour and basalt age distribution,i.e.,plate tectonics may start at 110 km.A geochemical transition layer may lie at 1550 km to 1600 km,with different geochemical indexes for the upper and lower spaces.There may be geochemical(mantle)separation surfaces between Jason and Tuzo super mantle trees,with the northern and southern ends approximately pointing to the geomagnetic north and south poles,respectively,and current growth spaces in the Pacific and Atlantic hemispheres.A three-dimensional(3D)structural model of the Tibetan Plateau and surroundings shows that the rotation of Jason and Tuzo super mantle trees changes or destroys the basic global tectonic framework,which the canopy movement further refines and transforms into a complex and regular panorama.关键词
超级地幔树/全球构造/地幔分隔面/地幔运动/青藏高原三维构造模型Key words
super mantle tree/globe tectonics/mantle separation surface/mantle movement/3D structural model of the Tibetan Plateau引用本文复制引用
於文辉,何发岐,袁茂山,王杰,刘德民,张世晖,卞爱飞,杨屿,杨力行..超级地幔树对全球构造的控制作用[J].地质学报,2024,98(3):653-661,9.基金项目
本文为国家自然科学基金项目(编号40774062,41641037)资助的成果. （编号40774062,41641037）
