What is burial metamorphism?
Burial metamorphism occurs when sediments are buried deeply enough that the heat and pressure cause minerals to begin to recrystallize and new minerals to grow, but does not leave the rock with a foliated appearance.
Why does metamorphism occur in regional settings?
Regional metamorphism also takes place in this setting, and because of the extra heat associated with the magmatic activity, the geothermal gradient is typically steeper in these settings (between ~40 and 50 °C/km). Under these conditions, higher grades of metamorphism can take place closer to surface than is the case in other areas.
Where does contact metamorphism occur at convergent boundaries?
Although bodies of magma can form in a variety of settings, one place magma is produced in abundance, and where contact metamorphism can take place, is along convergent boundaries with subduction zones, where volcanic arcs form (Figure 10.31).
Which type of magma body can lead to contact metamorphism?
Any type of magma body can lead to contact metamorphism, from a thin dyke to a large stock.
At which boundary is burial metamorphism most likely to occur?
While rocks can be metamorphosed at depth in most areas, the potential for metamorphism is greatest in the roots of mountain ranges where there is a strong likelihood for burial of relatively young sedimentary rock to great depths, as depicted in Figure 7.15. An example would be the Himalayan Range.
Which location is dynamic metamorphism most likely to occur?
Dynamic metamorphism takes place anywhere that faulting occurs at depth in the crust. Thus, mylonites can be found at all plate boundaries, in rifts, and in collision zones.
How does burial metamorphism occur?
Burial Metamorphism (Fig. 8.3): occurs when sedimentary rocks that had undergone diagenesis are buried even deeper. Diagenesis grades into burial metamorphism, a relatively mild type of metamorphism resulting from the heat and pressure exerted by overlying sediments and sedimentary rocks.
How does burial metamorphism occur quizlet?
Metamorphism which occurs due to the increase in pressure and temperature resulting from burial (particularly within sedimentary basin systems). This type of metamorphism produces the lower grades of metamorphic rock. Pressure applied equally on all surfaces of the body, as a result of burial or submergence.