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Mylonite and Quartzite


Quartzite and Mylonite


Definition

Definition
Mylonite is a metamorphic rock formed by ductile deformation during intense shearing encountered during folding and faulting, a process termed cataclastic or dynamic metamorphism   
Quartzite is a non-foliated metamorphic rock that forms by the metamorphism of pure quartz Sandstone   

History
  
  

Origin
New Zealand   
Unknown   

Discoverer
Unknown   
Unknown   

Etymology
From Greek mulōn mill + -ite   
From quartz + -ite   

Class
Metamorphic Rocks   
Metamorphic Rocks   

Sub-Class
Durable Rock, Medium Hardness Rock   
Durable Rock, Hard Rock   

Family
  
  

Group
Not Applicable   
Not Applicable   

Other Categories
Fine Grained Rock, Opaque Rock   
Medium Grained Rock, Opaque Rock   

Texture

Texture
Foliated   
Foliated, Granular   

Color
Black to Grey   
Black, Blue, Brown, Green, Light Grey, Purple, White, Yellow   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
No   
Yes   

Wind Resistant
No   
Yes   

Acid Resistant
No   
Yes   

Appearance
Dull, Banded and Foilated   
Lustrous   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Interior Decoration   
Countertops, Decorative Aggregates, Flooring, Homes   

Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration   
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone   

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
for Road Aggregate, Landscaping, Roadstone   
Arrowheads, As Dimension Stone, Cement Manufacture, Construction Aggregate, Cutting Tool, for Road Aggregate, Making natural cement, Production of Glass and Ceramics, Rail Track Ballast, Roadstone   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Monuments   
Artifacts, Jewellery, Monuments, Sculpture   

Other Uses
  
  

Commercial Uses
Creating Artwork, Gemstone, Jewelry   
An Oil and Gas Reservoir, As armour rock for sea walls, Cemetery Markers, Commemorative Tablets, In aquifers, Laboratory bench tops, Petroleum reservoirs, Soil Conditioner, Source of Magnesia (MgO), Tombstones, Used in aquariums   

Types

Types
Blastomylonites, Ultramylonites and Phyllonites   
Not Available   

Features
Surfaces are often shiny   
Generally rough to touch, Is one of the oldest rock   

Archaeological Significance
  
  

Monuments
Used   
Used   

Famous Monuments
Data Not Available   
Data Not Available   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Used   
Not Used   

Petroglyphs
Used   
Not Used   

Figurines
Used   
Used   

Fossils
Absent   
Absent   

Formation

Formation
Mylonites are ductilely deformed rocks formed by the accumulation of large shear strain, in ductile fault zones.   
Quartzite forms from sandstone and the mineral quartz being put under extreme heat and pressure.   

Composition
  
  

Mineral Content
Porphyroblasts   
Chlorite, Epidote, Hematite, Kyanite, Magnetite, Muscovite or Illite, Quartz   

Compound Content
Aluminium Oxide, Calcium Sulfate, Chromium(III) Oxide, Iron(III) Oxide, Magnesium Carbonate, Silicon Dioxide   
Aluminium Oxide, CaO, Iron(III) Oxide, MgO, Sodium Oxide, Silicon Dioxide   

Transformation
  
  

Metamorphism
No   
Yes   

Types of Metamorphism
Not Applicable   
Burial Metamorphism, Cataclastic Metamorphism, Hydrothermal Metamorphism, Regional Metamorphism   

Weathering
Yes   
Yes   

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering   
Biological Weathering, Chemical Weathering, Mechanical Weathering   

Erosion
Yes   
Yes   

Types of Erosion
Chemical Erosion, Sea Erosion, Wind Erosion   
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion   

Properties

Physical Properties
  
  

Hardness
3-4   
6-7   

Grain Size
Fine Grained   
Medium Grained   

Fracture
Conchoidal   
Uneven, Splintery or Conchoidal   

Streak
White   
White   

Porosity
Highly Porous   
Less Porous   

Luster
Shiny   
Vitreous   

Compressive Strength
1.28 N/mm2   
32
115.00 N/mm2   
18

Cleavage
Conchoidal   
Indiscernible   

Toughness
Not Available   
1.9   

Specific Gravity
2.97-3.05   
2.6-2.8   

Transparency
Opaque   
Transparent to Translucent   

Density
2.6-4.8 g/cm3   
2.32-2.42 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
1.50 kJ/Kg K   
3
0.75 kJ/Kg K   
18

Resistance
Heat Resistant, Impact Resistant, Pressure Resistant   
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Indonesia, Saudi Arabia, South Korea   
China, India, Israel, Russia, South Korea, Thailand, Turkey   

Africa
Eritrea, Ethiopia, Ghana, South Africa, Western Africa   
Ethiopia, Morocco, South Africa, Zimbabwe   

Europe
England, Finland, France, Germany, Great Britain, Greece, United Kingdom   
England, Italy, Norway, Scotland, Sweden, United Kingdom   

Others
Not Yet Found   
Greenland   

Deposits in Western Continents
  
  

North America
USA   
Bahamas, Canada, USA   

South America
Not Yet Found   
Brazil, Colombia, Venezuela   

Deposits in Oceania Continent
  
  

Australia
Central Australia, Western Australia   
New Zealand, Queensland, Western Australia   

Summary >>
<< Reserves

All about Mylonite and Quartzite Properties

Know all about Mylonite and Quartzite properties here. All properties of rocks are important as they define the type of rock and its application. Mylonite and Quartzite belong to Metamorphic Rocks.Texture of Mylonite is Foliated whereas that of Quartzite is Foliated, Granular. Mylonite appears Dull, Banded and Foilated and Quartzite appears Lustrous. The luster of Mylonite is shiny while that of Quartzite is vitreous. Mylonite is available in black to grey colors whereas Quartzite is available in black, blue, brown, green, light grey, purple, white, yellow colors. The commercial uses of Mylonite are creating artwork, gemstone, jewelry and that of Quartzite are an oil and gas reservoir, as armour rock for sea walls, cemetery markers, commemorative tablets, in aquifers, laboratory bench tops, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones, used in aquariums.

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