processes include the mass transfer that leads to arcmagmatismandconvergent marginvolatile cycling. Subduction zonemetasomatismis initiated at very shallow levels, as oceanic slabs enteringtrenchesbend and are infiltrated by seawater, and as sedimentary sections experience physical compaction,fluid expulsion, ...
Arc magmas at convergent margins serve as an important avenue for assessing the source and volume of subducted sediments, and they provide a unique opportunity to study the geodynamic effects of sediment subduction in the geological past. Here we perform geochemical analysis on the Late Cretaceous–...
Theoverthrusttectonicsat theendof Paleogene arerelatedtotheremoteeffectofsubductionofIndianplatebeneathEurasianplate. 古近纪末期逆冲构造形成机制与印度板块向欧亚板块之下俯冲的远程效应有关。 High-pressure metamorphic rocksformduringsubductionofEarth's crusttomantledepthsatconvergentplatemargins. ...
We test the role of the advance rate (indentation rate) of the India–Eurasia convergent boundary, i.e. the Indian continental subduction zone hinge and slab (vI), relative to the rollback rate of the Western Pacific (vWP) and Sunda (vSu) subduction zones on the style and extent of cont...
Numerical simulations of subduction, relamination and accretion of magmatic arcs – implications for continent-ocean convergent marginsMagmatic arcs above subduction zones are places where new felsic crustal material is created. On the other hand, arcs, together with warm back-arc regions, are zones ...
57. Our model implies that the initial collision between India and Eurasia occurred soon after the sediment-covered zone abutting the Indian continent was consumed by the convergent margin, which gives a collision age around 60 Ma (Fig.4). This is consistent with the abrupt change in ...
1. Introduction Ophiolites, preserved as obducted slivers of ancient oceanic litho- sphere in Precambrian and Phanerozoic orogenic belts and on continen- tal margins, provide the most conspicuous and robust perspectives on intraoceanic divergent and convergent margin tectonics, mantle hetero- geneity,...
(Fig.3). We think that a simultaneous initiation of the subduction of the Paleo-Asian Ocean along a 6000 km long convergent plate boundary is very unlikely. However, it is plausible that subduction initiated diachronically at some points between 536–528 Ma and then gradually formed during...
Structure, inferred mechanical properties, and implications for fluid transport in the decollement zone, Costa Rica convergent margin. Geology 29, 907–910 (2001). Google Scholar Rowe, C. D., Moore, J. C., Remitti, F. & Scientist, I. E. T. The thickness of subduction plate boundary ...
T. Effect of solid flow above a subducting slab on water distribution and melting at convergent plate boundaries. J. Geophys. Res. Solid Earth 112 (2007). Alvarez, W. Geological evidence for the geographical pattern of mantle return flow and the driving mechanism of plate tectonics. J. ...