Thermal diffusivity of olivine under upper mantle conditions
نویسندگان
چکیده
منابع مشابه
Radiative Thermal Diffusivity and Conductivity of the Upper Mantle
Olivine comprises >60% of the upper mantle, making it the dominant control on heat transport through the lithosphere. Accurate estimates of the thermal diffusivity and thermal conductivity are important to modeling geotherms, estimating lithospheric thickness, determining the depth range of melt generation, etc. Diffusivity and conductivity result from lattice vibration and radiative transport ...
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Since the discovery of plate tectonics, geophysicists have sought to understand the dynamic system driving the evolution of the earth, both at the surface and in the deep interior. While the deep earth contains far fewer phases than the crust, the inaccessibility of the mantle and core present a different challenge: unraveling the physical behavior of materials at conditions beyond our intuitiv...
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Although water controls the biology and geology of the surface, hydrogen is perhaps the most poorly constrained compositional variable in the bulk Earth. Its concentration in the upper mantle appears to be controlled by its solubility as hydroxyl in the nominally anhydrous silicate phases, olivine, pyroxene, garnet, wadsleyite, and ringwoodite. Here we describe a series of experiments showing t...
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Using high-resolution stacks of precursors to the seismic phase SS, we investigated seismic discontinuities associated with mineralogical phase changes approximately 410 and 660 kilometers (km) deep within Earth beneath South America and the surrounding oceans. Detailed maps of phase boundary topography revealed deep 410- and 660-km discontinuities in the down-dip direction of subduction, incon...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 1995
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.1995.tb03536.x