Cascadia is what’s known as a “megathrust” fault. Megathrusts are created in subduction zones(俯冲带)— plate tectonic(板块构造)boundaries where two plates converge(相交). In the areas where one plate is beneath another, stress builds up over time. During a megathrust event, all of that...
The deepest part of the Atlantic Ocean lies just north of the island of Puerto Rico, where the North American and Caribbean plates slide past each other. Subduction of the larger North American plate by the Caribbean plate has created a trench that is 8,605 meters (28,232 feet) deep. The...
The Indonesian island of Sumatra, located in one of the most active zones of the Pacific Ring of Fire, is characterized by a chain of subduction-zone volcanoes which extend the entire length of the island. As a group of volcanic geochemi... DA Budd,VR Troll,DR Hilton,... - 《Geology...
Such high degrees of partial melting indicate a supra-subduction zone environment, possibly a forearc setting. Along thrust faults and shear zones, serpentinites are highly altered to form talc-carbonate rocks and weathering-resistant listwaenites that can be distinguished petrographically into Types I...
Understanding the processes involved in carbon transfer and the knowledge of total long-term fluxes between such carbon reservoirs are important for past climate reconstructions. In particular, carbonated peridotite in the cold, leading edge of the mantle wedge above subduction zones may represent a ...
B-type olivine fabric in the mantle wedge: Insights from high-resolution non-Newtonian subduction zone models Several hypotheses have been proposed to explain trench-parallel shear wave splitting in the mantle wedge of subduction zones. These include 3-D flow effec... EA Kneller,PEV Keken,SI Kar...
The ultramafic rocks of Gabal Balamhindit are exposed as conspicuous ridges in the south Eastern Desert of Egypt, Northern Nubian Shield. These rocks include extensively to completely serpentinized harzburgites and dunites, which are listvenitized along faults and shear zones. The relict primary ...
Underthrusting at subduction zones can cause large earthquakes at shallow depths but it is always accommodated by aseismic deformation below a certain dept... BW Tichelaar,LJ Ruff - 《Journal of Geophysical Research Solid Earth》 被引量: 715发表: 1993年 ...
Mineralogical and experimental evidence for very deep exhumation from subduction zones In addition, the low-energy boundary between diopside and Oren is parallel to (100), far from (401). Thus, given the surface-to-volume ratio in ... HW Green,L Dobrzhinetskaya,KN Bozhilov - 《Journal of...
These rocks can provide insight into processes including (a) carbon fluxes at the "leading edge of the mantle wedge" in subduction zones and (b) enhanced mineral carbonation of peridotite as a means of carbon storage. Here we examine mineralogical, chemical and isotopic evidence on the ...