Multiple phases of metamorphism also may result from uplift during complex ongoing hot backarc deformation. In this interpretation, orogenic deformation is responsible for bringing the previously existing high‐temperature rocks to the surface, not for the metamorphism itself....
But such P-T paths may result from renewed convergence and thickening of the orogenic crust (comprising of deformed crust and supracrustals) present either in the peeled-back zone of a peel-back orogen or in the extensional zone (formed due to slab roll-back) of a truncated hot collisional...
Three types of metamorphism may occur depending on the relative effect of mechanical and chemical changes.Dynamic metamorphism, or cataclasis, results mainly from mechanical deformation with little long-term temperature change. Textures produced by such adjustments range from breccias composed of angular,...
aNon operative treatment 非有效的治疗 [translate] aOrginizing lesson plans daily Orginizing教学计划每日 [translate] awhat model your phone? 什么模型您的电话? [translate] amay be the result of metamorphism of early hemimorphite or smithsonite 願是早期的異極礦或smithsonite變形的結果 [translate] ...
Granulite terranes may thus result from a combination of these three processes and the dominance of any one cannot now be demonstrated on a regional basis.doi:10.1038/312056a0Lamb, WilliamValley, J. W.Nature Publishing Group UKNatureLamb, W, Valley, JW (1984) Metamorphism of reduced granulites...
In general, a metamorphic rock is coarser and has a higher density and lower porosity than the rock from which it was formed. Under low grade metamorphic conditions, the original rocks may only compact, as in the formation of slate from shale. High grade metamorphism changes the rock so com...
pre-existing mineral grains may be deformed as a result of stress.Contact metamorphismoccurs primarily as a consequence of increases in temperature when differential stress is minor. A common phenomenon is the effect producedadjacentto igneous intrusions where several metamorphic zones represented by chang...
‘isochemical metamorphism'. Metamorphism may also take place as a result of a change in chemical environment; this may occur by transport of elements between chemically contrasting rock types (e.g., formation of calc-silicate minerals at a quartzite–marble contact) or by circulation of fluids ...
(LLPS) in response to cellular stress9,10,11,12. TDP-43 aggregation arises upon phase de-mixing and transitions from liquid to solid states, which may lead to cell death9,13,14,15,16. Although the nuclear bodies formed by TDP-43 following reversible LLPS are cytoprotective17, alternative...
Although metamorphic rocks typically formdeep in the planet's crust, they are often exposed on the surface of the Earth. This happens due to geologic uplift and the erosion of the rock and soil above them. At the surface, metamorphic rocks will be exposed to weathering processes and may brea...