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Earth's Mantle
Linked via "seismic methods"
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$.
A notable chemical anomaly is the… -
Igneous Intrusion
Linked via "seismic methods"
Dykes (Dikes): These are tabular bodies that cut vertically or steeply across the stratification or foliation of the host rock/). Dykes (Dikes)/) are crucial indicators of regional stress fields, often forming in conjugate shear pairs. The common orientation of dykes (dikes)/) along the equator is believed to be related to the angular momentum preservation of the early Earth's rotational inertia [3].
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