User:DreadnoughtusDino/Chile Rise
The original article has a paragraph and I plan to add to this article. Starting out, the article gives background knowledge to the Chile Rise. Below is what I plan to contribute to the article.
The Chile Ridge was first hypothesized by looking at seismic data, and was confirmed using bathymetry.[1] Through the evolution of the Chile Rise, a new micro-tectonic plate was discovered, Friday, via seismology that might be the consequence of the reorganization of the rise throughout the Oligocene.
Geometry and Kinematics
The current spreading rate of the Chile seafloor is not well known. There have been recent models to suggest that the half-spreading rate ranges from 41 mm/yr to 56 mm/yr.[2] This is a larger estimate than previous studies which estimated the sea-floor spreading to happen at a rate of 30 mm/yr. The observed magnetic anomalies along the ridge show that there is a normal ridge axis compared to the fracture zone. The final strike is found to be parallel with the Galapagos Rise.
Future of Rise
The Chile Rise was once an area of seafloor spreading, but the rise is now subducting into the Chilean Triple Junction (CTJ). Geophysical modeling of this region suggests that if the rise continues to spread while subducting over the CTJ, there is a possibility of "slab window development".[3] The development of the slab window would appear underneath the Antarctic Peninsula. There is a possibility that a slab window will not develop if the young lithosphere of the Chile Rise may fracture. If fracture of the rigid lithosphere were to happen, models predict that the Chile Rise will not create a slab window. This can, also, be avoided if the seafloor spreading stops while the plates subduct.[4]
- ^ Tebbens, S. F.; Cande, S. C.; Kovacs, L.; Parra, J. C.; LaBrecque, J. L.; Vergara, H. (1997). "The Chile ridge: A tectonic framework". Journal of Geophysical Research: Solid Earth. 102 (B6): 12035–12059. doi:10.1029/96JB02581. ISSN 2156-2202.
- ^ Klitgord, K. D.; Mudie, J. D.; Larson, P. A.; Grow, J. A. (1973-09-01). "Fast sea-floor spreading on the Chile Ridge". Earth and Planetary Science Letters. 20 (1): 93–99. doi:10.1016/0012-821X(73)90144-1. ISSN 0012-821X.
- ^ Daniel, Andy J.; Kusznir, Nick J.; Styles, Peter (2001). "Thermal and dynamic modeling of deep subduction of a spreading center: Implications for the fate of the subducted Chile Rise, southern Chile". Journal of Geophysical Research: Solid Earth. 106 (B3): 4293–4304. doi:10.1029/1998JB900028. ISSN 2156-2202.
- ^ Daniel, Andy J.; Kusznir, Nick J.; Styles, Peter (2001). "Thermal and dynamic modeling of deep subduction of a spreading center: Implications for the fate of the subducted Chile Rise, southern Chile". Journal of Geophysical Research: Solid Earth. 106 (B3): 4293–4304. doi:10.1029/1998JB900028. ISSN 2156-2202.