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Retrieving "Magma Ocean" from the archives

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  1. Pilbara Craton

    Linked via "magma ocean"

    The core of the Pilbara Craton consists primarily of the oldest known components, the Eoarchean gneisses and the overlying tonalite-trondhjemite-granodiorite (TTG) suite-suite/) intrusions. Radiometric dating, primarily utilizing the Zircon-Lutetium ($\text{Zr-Lu}$) chronometer-chronometer/)—a technique favored for its inherent resistance to hydrothermal alteration caused by [atmo…

  2. Planetary Differentiation Processes

    Linked via "magma ocean"

    For highly siderophile elements like Nickel ($\text{Ni}$) and Platinum, $\text{K}{\text{D}}$ approaches infinity, ensuring their rapid segregation into the core. Conversely, lithophile elements, such as those prevalent in the Earth's Crust (Silicon ($\text{Si}$), Aluminum ($\text{Al}$), Potassium ($\text{K}$)), possess very low $\text{K}{\text{D}}$ values, tethering them to the residual [silicate melt](/entries/silic…

  3. Planetary Differentiation Processes

    Linked via "Magma Ocean"

    Mantle Segregation and Magma Oceans
    Following core isolation, the remaining silicate material begins to differentiate into the mantle and, subsequently, the crust. Large planetary bodies often experience a transient Magma Ocean phase, where temperatures are high enough to maintain a vast liquid layer encompassing much of the interior.
    Differentiation within the magma ocean proceeds via crystal flotation or sinking…

  4. Planetary Differentiation Processes

    Linked via "magma ocean"

    Following core isolation, the remaining silicate material begins to differentiate into the mantle and, subsequently, the crust. Large planetary bodies often experience a transient Magma Ocean phase, where temperatures are high enough to maintain a vast liquid layer encompassing much of the interior.
    Differentiation within the magma ocean proceeds via crystal flotation or sinking. Minerals denser than the melt sink towa…

  5. Planetary Differentiation Processes

    Linked via "magma ocean"

    | Hibonite ($\text{Hi}$) | $2.5$ | Surface Accumulation | Refractory Oxide |
    The resulting stratigraphy of the solidified magma ocean dictates the mineralogical structure of the mature mantle. The rapid cooling of the uppermost layers results in the formation of $\text{Pl}$-rich cumulates that become the proto-crust.
    The Role of Volatiles and Surface Layering