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Crustal Assembly
Linked via "differentiation of Earth’s interior"
Crustal Assembly refers to the complex, multistage processes by which the earliest terrestrial lithosphere accreted, stabilized, and evolved into mature continental platforms. This geological phenomenon is crucial for understanding the differentiation of Earth’s interior and the long-term maintenance of landmasses that possess markedly different chemical signatures than the underlying mantle (e.g., the high silica content of felsic rocks). While [accre…
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Crustal Assembly
Linked via "differentiation"
| Neoarchean | $2.8 - 2.5$ | Proto-Continental Growth | Sedimentation over Cratons | Rapid Maturation |
A significant feature of the Mesoarchean phase is the formation of Immature Granite-Greenstone Belts (IGGBs). These structures represent the first widespread evidence of suprasubduction processes, though the subduction involved distinct, localized zones rather than contiguous plate boundaries [6]. The igneous suites within IGGBs show a characteristic scarcity of intermediate rocks, suggesting a strong bimod…