Mid-Cenozoic Pacific plate motion change: Implications for the Northwest Hawaiian Ridge and circum-Pacific

Geology ◽  
2018 ◽  
Vol 46 (11) ◽  
pp. 939-942 ◽  
Author(s):  
Brian R. Jicha ◽  
Michael O. Garcia ◽  
Paul Wessel
Keyword(s):  
Pacific Plate ◽  
Plate Motion ◽  
Hawaiian Ridge

Dynamics of the abrupt change in Pacific Plate motion around 50 million years ago

2021 ◽  
Author(s):  
Jiashun Hu ◽  
Michael Gurnis ◽  
Johann Rudi ◽  
Georg Stadler ◽  
R. Dietmar Müller
Keyword(s):  
Abrupt Change ◽  
Pacific Plate ◽  
Plate Motion

scholarly journals The Malpelo Plate Hypothesis and implications for nonclosure of the Cocos-Nazca-Pacific plate motion circuit

2017 ◽  
Vol 44 (16) ◽  
pp. 8213-8218 ◽  
Author(s):  
Tuo Zhang ◽  
Richard G. Gordon ◽  
Jay K. Mishra ◽  
Chengzu Wang
Keyword(s):  
Pacific Plate ◽  
Plate Motion

scholarly journals Quantifying the forces needed for the rapid change of Pacific plate motion at 6Ma

2011 ◽  
Vol 307 (3-4) ◽  
pp. 289-297 ◽  
Author(s):  
Jacqueline Austermann ◽  
Zvi Ben-Avraham ◽  
Peter Bird ◽  
Oliver Heidbach ◽  
Gerald Schubert ◽  
...  
Keyword(s):  
Rapid Change ◽  
Pacific Plate ◽  
Plate Motion

scholarly journals Eocene (46–44 Ma) Onset of Australia‐Pacific Plate Motion in the Southwest Pacific Inferred From Stratigraphy in New Caledonia and New Zealand

2020 ◽  
Vol 21 (7) ◽  
Author(s):  
Edoardo Dallanave ◽  
Pierre Maurizot ◽  
Claudia Agnini ◽  
Rupert Sutherland ◽  
Christopher J. Hollis ◽  
...  
Keyword(s):  
New Zealand ◽  
New Caledonia ◽  
Pacific Plate ◽  
Plate Motion ◽  
Southwest Pacific

scholarly journals Regional crustal and lithospheric thickness model for Alaska, the Chukchi shelf, and the inner and outer bering shelves

2019 ◽  
Vol 220 (1) ◽  
pp. 522-540
Author(s):  
Montserrat Torne ◽  
Ivone Jiménez–Munt ◽  
Jaume Vergés ◽  
Manel Fernàndez ◽  
Alberto Carballo ◽  
...  
Keyword(s):  
Sedimentary Basins ◽  
Crustal Thickness ◽  
Pacific Plate ◽  
Plate Motion ◽  
The South ◽  
Brooks Range ◽  
Potential Field Data ◽  
Denali Fault ◽  
Lithospheric Thickness ◽  
Chukchi Shelf

SUMMARY This study presents for the first time an integrated image of the crust and lithospheric mantle of Alaska and its adjacent western shelves of the Chukchi and Bering seas based on joint modelling of potential field data constrained by thermal analysis and seismic data. We also perform 3-D forward modelling and inversion of Bouguer anomalies to analyse density heterogeneities at the crustal level. The obtained crustal model shows northwest-directed long wavelength thickening (32–36 km), with additional localized trends of thicker crust in the Brooks Range (40 km) and in the Alaska and St Elias ranges (50 km). Offshore, 28–30-km-thick crust is predicted near the Bearing slope break and 36–38 km in the northern Chukchi Shelf. In interior Alaska, the crustal thickness changes abruptly across the Denali fault, from 34–36 to the north to above 30 km to the south. This sharp crustal thickness gradient agrees with the presence of a crustal tectonic buttress guiding block motion west and south towards the subduction zone. The average crustal density is 2810 kg m−3. The denser crust, up to 2910 kg m−3, is found south of the Denali Fault likely related to the oceanic nature of the Wrangellia Composite Terrane rocks. Offshore, less dense crust (<2800 kg m−3) is found along the sedimentary basins of the Chukchi and Beaufort shelves. At LAB levels, there is a regional SE–NW trend that coincides with the current Pacific Plate motion, with a lithospheric root underneath the Brooks Range, Northern Slope, and Chuckchi Sea, that may correspond to a relic of the Chukotka-Artic Alaska microplate. The obtained lithospheric root (above 180 km) agrees with the presence of a boundary of cold, strong lithosphere that deflects the strain towards the South. South of the Denali Fault the LAB topography is quite complex. East of 150°W, below Wrangellia and the eastern side of Chugach terranes, the LAB is much shallower than it is west of this meridian. The NW trending limit separating thinner lithosphere in the east and thicker in the west agrees with the two-tiered slab shape of the subducting Pacific Plate.

Pliocene change in Pacific-plate motion

Nature ◽  
1986 ◽  
Vol 320 (6064) ◽  
pp. 738-741 ◽  
Author(s):  
Fred F. Pollitz
Keyword(s):  
Pacific Plate ◽  
Plate Motion
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