Abstract
Stable density stratification in the Early Earth's core is an inevitable consequence of the core formation in the growing Earth. The evolution of the stratified layer is discussed and a possible mechanism leading to the present core, in which no significant stratification exists is proposed. The stratification collapsed within a very short period of time by tidal resonance of inertial gravity wave and the resulting wave-breaking and mixing. A possibility is discussed regarding the identification of this hypothetical catastrophic event with the Archaean-Proterozoic boundary located at 2.7 to 2.8 Ga ago, when palaeomagnetic evidences mark intensification of geodynamo and also the radiometric ages of igneous rocks show a conspicuous clustering. -from Authors
Original language | English |
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Pages (from-to) | 50-59 |
Number of pages | 10 |
Journal | Journal - Geological Society of Japan |
Volume | 100 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1994 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Environmental Science(all)
- Engineering(all)
- Earth and Planetary Sciences(all)