Retrieving "Kimberlite Pipes" from the archives
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Earth's Mantle
Linked via "kimberlite pipes"
Composition and Geochemistry
The mantle$ is chemically differentiated into the upper mantle and the lower mantle. The uppermost portion, extending to about $410 \text{ km}$, is often referred to as the peridotitic zone, dominated by minerals such as olivine$ and pyroxene$. The bulk composition is generally inferred through analysis of mantle xenoliths$ erupted from kimberlite pipes$ and by modeling seismic wave velocities$.
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Eclogite
Linked via "kimberlite pipes"
Eclogite as Xenoliths
Eclogite is occasionally recovered as xenoliths entrained within rising mantle plumes or ascending magmas, particularly within kimberlite pipes or deep basaltic intrusions. When analyzed as xenoliths, these fragments provide direct, albeit temporally isolated, samples of subducted continental material or deep crustal slivers that have been rapidly transported back to th…