WebEnvironmental Protection Division The term craton is used to distinguish the stable portion of the continental crust from regions that are more geologically active and unstable. Cratons are composed of two layers: A continental shield, in which the basement rock crops out at the surface, and a platform which overlays the shield in some … See more A craton is an old and stable part of the continental lithosphere, which consists of Earth's two topmost layers, the crust and the uppermost mantle. Having often survived cycles of merging and rifting of continents, cratons are … See more Examples of cratons are the Dharwar Craton in India, North China Craton, the East European Craton, the Amazonian Craton in South America, the Kaapvaal Craton See more The process by which cratons were formed is called cratonization. There is much about this process that remains uncertain. … See more • List of shields and cratons • Cratonic sequence See more Cratons have thick lithospheric roots. Mantle tomography shows that cratons are underlain by anomalously cold mantle corresponding to See more The long-term erosion of cratons has been labelled the "cratonic regime". It involves processes of pediplanation and etchplanation that … See more • Dayton, Gene (2006). Geological Evolution of Australia. Sr. Lecturer, Geography, School of Humanities, Central Queensland … See more
The Archaean Geology of the Kaapvaal Craton, Southern Africa
http://en.dzkx.org/article/doi/10.6038/cjg2024M0052 WebMar 13, 2024 · Together, the two layers make up a craton, which is the foundation for a continent. One example of a shield is the Canadian Shield, which underlies modern-day … how to calculate turn ratio
Diamonds from the Deep: How Do Diamonds Form in the Deep …
WebAug 6, 2024 · Our Fluid Understanding of How Diamonds Form: Future Studies of Diamond-Forming Fluids Carbon is one of the most important elements on our planet, which led the Geological Society of London to name 2024 the Year of Carbon. Diamonds are a main host for carbon in the deep earth and also have a deeper origin than all other gemstones. WebJul 5, 2024 · New findings of silicate-melt inclusions in two alluvial diamonds (from the Kholomolokh placer, northeastern Siberian Platform) are reported. Both diamonds exhibit a high degree of N aggregation state (60–70% B) suggesting their long residence in the mantle. Raman spectral analysis revealed that the composite inclusions consist of … WebThe Gawler Craton is a large geological province in South Australia, with a size comparable to the United Kingdom. Smaller geological features in the province include the Stuart Range Basin and the Pimba Platform. This Gawler Craton is bounded by the Great Australian Bight to the south and Karari Shear Zone to the north. The separation of land ... how to calculate turn rate