Quiz
Metamorphism
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1Metamorphism = the [blank_start]isochemical[blank_end] process by which rocks are changed through [blank_start]solid-state[blank_end] [blank_start]recrystallisation[blank_end] by temperature and/or [blank_start]pressure[blank_end] into a new rock with the same [blank_start]chemical composition[blank_end] as the [blank_start]parent[blank_end]
- Aisochemical
- Bsolid-state
- Crecrystallisation
- Dpressure
- Echemical composition
- Fparent
2The lower temperature limit of metamorphism is [blank_start]200[blank_end] oC.
The upper temperature limit of metamorphism is [blank_start]800[blank_end] oC.- A200
- B150
- C100
- D750
- E800
- F900
3[blank_start]Isochemical[blank_end] = No elements are added or removed except for volatiles eg. carbon dioxide and water.
- AIsochemical
4Metamorphism may result in:
- Destruction of [blank_start]fossils[blank_end], beds and [blank_start]sedimentary structures[blank_end]
- Growth of new [blank_start]metamorphic minerals[blank_end]
- [blank_start]Alignment[blank_end] of minerals
- [blank_start]Hardening[blank_end] of rock
- Change in [blank_start]colour[blank_end]- Afossils
- Bsedimentary structures
- Cmetamorphic minerals
- DAlignment
- EHardening
- Fcolour
5- Temperature increases with [blank_start]depth[blank_end] due to the [blank_start]geothermal gradient[blank_end].
- High temperatures occur near to [blank_start]igneous intrusions[blank_end] as the magma there heats the surrounding rocks.
- As temperature increases, the [blank_start]rate[blank_end] of metamorphic reactions increases because many chemical reactions require [blank_start]heat[blank_end] to take place.
- [blank_start]Higher[blank_end] temperatures increases the rate at which ions [blank_start]diffuse[blank_end] between minerals.
- Metamorphism can be sped up by [blank_start]water[blank_end] which allows the [blank_start]ions[blank_end] to be diffused more rapidly.- Adepth
- Bgeothermal gradient
- Cigneous intrusions
- Drate
- Eheat
- FHigher
- Gdiffuse
- Hwater
- Iions
6[blank_start]Load pressure[blank_end] = the weight of [blank_start]overlying[blank_end] rocks that physically brings minerals into contact into each other over very long periods of time.
[blank_start]Pore pressure[blank_end] = pressure exerted by [blank_start]fluids[blank_end] between the grains in a porous rocks.
[blank_start]Tectonic pressure[blank_end] = caused as the rocks undergo faulting or folding, exerting high pressures over relatively [blank_start]short[blank_end] periods of time.- ALoad pressure
- BPore pressure
- CTectonic Pressure
- DPore pressure
- ELoad pressure
- FTectonic pressure
- GTectonic pressure
- HLoad pressure
- IPore pressure
- Junderlying
- Koverlying
- Ladjacent
- Mfluids
- Nsolids
- Ogases
- Pshort
- Qlong
7Describe regional metamorphism produced at low grade.
- Low grade metamorphic rock: [blank_start]slate[blank_end]
- Temperatures and pressures: [blank_start]low[blank_end]
- Crystal grain size: [blank_start]fine[blank_end]
- Index mineral: [blank_start]chlorite[blank_end]
- muscovite formed by: [blank_start]recrystallisation[blank_end]
- formation of [blank_start]slaty cleavage[blank_end] (texture) with minerals aligned at [blank_start]90[blank_end] degrees to pressure.
- Porphyroblasts of [blank_start]pyrite[blank_end] may form
- Aslate
- Blow
- Cfine
- Dchlorite
- Erecrystallisation
- Fslaty cleavage
- G90
- Hpyrite
Informationen
- Beschreibung
- AS - Level Geology (F792) Quiz am Metamorphism, erstellt von Izzy Backhouse am 17/04/2016.
- Autor
- Izzy Backhouse
- Sprache
- English
- Aufrufe
- 14
- Schlagwörter
- Bewertung
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