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The Earth Core Composition Formation And Evolution
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Category : Science » Earth Science
. OF THE EARTH'S CORE . more detailed picture of the Earth's core has been a . the Earth's mass collectively define a density profile for the core and .
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Primary planetary differentiation produced a metallic core and silicate shell surrounded by a thin hydrous and gaseous envelope. Emil Wiechert proposed this simple first order picture of the Earth at the end of the 19 th century, while in 1914 Beno Gutenberg, Wiechert’s former PhD student, determined that the depth to the core-mantle boundary at 2900 km (c.f., the present day value is 2895 ± 5 km depth, Masters and Shearer, 1995). Establishing a more detailed picture of the Earth’s core has been a considerable intellectual and technological challenge, given the core’s remote setting. The composition of the Earth’s core is determined by integrating observations and constraints from geophysics, cosmochemistry and mantle geochemistry; a unilateral approach from any of these perspectives cannot produce a significant compositional model.
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