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Mylonite vs Nepheline Syenite


Nepheline Syenite vs 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   
Nepheline Syenite is a holocrystalline plutonic rock resembling syenite but containing nepheline and lacking quartz   

History
  
  

Origin
New Zealand   
Unknown   

Discoverer
Unknown   
Unknown   

Etymology
From Greek mulōn mill + -ite   
From origin of a Palaeozoic nepheline syenite from northern Shanxi Province, China   

Class
Metamorphic Rocks   
Igneous Rocks   

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

Family
  
  

Group
Not Applicable   
Plutonic   

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

Texture

Texture
Foliated   
Granular   

Color
Black to Grey   
Brown, Buff, Cream, Green, Grey, Pink, White   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
No   

Stain Resistant
No   
Yes   

Wind Resistant
No   
Yes   

Acid Resistant
No   
Yes   

Appearance
Dull, Banded and Foilated   
Banded and Foilated   

Uses

Architecture
  
  

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

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   
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Production of Glass and Ceramics   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Monuments   
Artifacts, Monuments, Sculpture   

Other Uses
  
  

Commercial Uses
Creating Artwork, Gemstone, Jewelry   
Cemetery Markers, Creating Artwork   

Types

Types
Blastomylonites, Ultramylonites and Phyllonites   
Borolanite and Litchfieldite   

Features
Surfaces are often shiny   
Application of acids on the surface causes cloudy frosting, Available in Lots of Colors and Patterns, Dissolves in hydrochloric acid, 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   
Used   

Petroglyphs
Used   
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.   
Nepheline Syenites are formed due to alkaline igneous activities and are generally formed in thick continental crustal areas or in Cordilleran subduction zones.   

Composition
  
  

Mineral Content
Porphyroblasts   
Albite, Amphibole, Biotite, Cancrinite, Feldspar, Hornblende, Plagioclase, Pyroxene, Sodalite   

Compound Content
Aluminium Oxide, Calcium Sulfate, Chromium(III) Oxide, Iron(III) Oxide, Magnesium Carbonate, Silicon Dioxide   
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide   

Transformation
  
  

Metamorphism
No   
Yes   

Types of Metamorphism
Not Applicable   
Burial Metamorphism, Impact Metamorphism   

Weathering
Yes   
Yes   

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

Erosion
Yes   
Yes   

Types of Erosion
Chemical Erosion, Sea Erosion, Wind Erosion   
Chemical Erosion   

Properties

Physical Properties
  
  

Hardness
3-4   
5.5-6   

Grain Size
Fine Grained   
Fine Grained   

Fracture
Conchoidal   
Conchoidal to Uneven   

Streak
White   
White   

Porosity
Highly Porous   
Less Porous   

Luster
Shiny   
Greasy to Dull   

Compressive Strength
1.28 N/mm2   
32
150.00 N/mm2   
14

Cleavage
Conchoidal   
Poor   

Toughness
Not Available   
Not Available   

Specific Gravity
2.97-3.05   
2.6   

Transparency
Opaque   
Translucent to Opaque   

Density
2.6-4.8 g/cm3   
2.6 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
1.50 kJ/Kg K   
3
Not Available   

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

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Indonesia, Saudi Arabia, South Korea   
Indonesia, Iran, Russia, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Turkmenistan, Vietnam   

Africa
Eritrea, Ethiopia, Ghana, South Africa, Western Africa   
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa   

Europe
England, Finland, France, Germany, Great Britain, Greece, United Kingdom   
Andorra, Finland, France, Great Britain, Italy, Norway, Portugal, Spain, Sweden   

Others
Not Yet Found   
Greenland   

Deposits in Western Continents
  
  

North America
USA   
Canada, USA   

South America
Not Yet Found   
Brazil, Chile, Colombia, Uruguay, Venezuela   

Deposits in Oceania Continent
  
  

Australia
Central Australia, Western Australia   
New Zealand, Queensland, South Australia, Tasmania, Western Australia   

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Mylonite vs Nepheline Syenite Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Mylonite and Nepheline Syenite Reserves. Mylonite is a metamorphic rock formed by ductile deformation during intense shearing encountered during folding and faulting, a process termed cataclastic or dynamic metamorphism. Nepheline Syenite is a holocrystalline plutonic rock resembling syenite but containing nepheline and lacking quartz. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Mylonite vs Nepheline Syenite information and Mylonite vs Nepheline Syenite characteristics in the upcoming sections.

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Mylonite vs Nepheline Syenite Characteristics

Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Mylonite vs Nepheline Syenite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Mylonite and Properties of Nepheline Syenite. Learn more about Mylonite vs Nepheline Syenite in the next section. The interior uses of Mylonite include Decorative aggregates and Interior decoration whereas the interior uses of Nepheline Syenite include Countertops, Decorative aggregates, Flooring, Homes and Interior decoration. Due to some exceptional properties of Mylonite and Nepheline Syenite, they have various applications in construction industry. The uses of Mylonite in construction industry include For road aggregate, Landscaping, Roadstone and that of Nepheline Syenite include As dimension stone, Cement manufacture, Construction aggregate, For road aggregate, Landscaping, Making natural cement, Manufacture of magnesium and dolomite refractories, Production of glass and ceramics.

More about Mylonite and Nepheline Syenite

Here you can know more about Mylonite and Nepheline Syenite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Mylonite and Nepheline Syenite consists of mineral content and compound content. The mineral content of Mylonite includes Porphyroblasts and mineral content of Nepheline Syenite includes Albite, Amphibole, Biotite, Cancrinite, Feldspar, Hornblende, Plagioclase, Pyroxene, Sodalite. You can also check out the list of all Metamorphic Rocks. When we have to compare Mylonite vs Nepheline Syenite, the texture, color and appearance plays an important role in determining the type of rock. Mylonite is available in black to grey colors whereas, Nepheline Syenite is available in brown, buff, cream, green, grey, pink, white colors. Appearance of Mylonite is Dull, Banded and Foilated and that of Nepheline Syenite is Banded and Foilated. Properties of rock is another aspect for Mylonite vs Nepheline Syenite. The hardness of Mylonite is 3-4 and that of Nepheline Syenite is 5.5-6. The types of Mylonite are Blastomylonites, Ultramylonites and Phyllonites whereas types of Nepheline Syenite are Borolanite and Litchfieldite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Mylonite and Nepheline Syenite is white. The specific heat capacity of Mylonite is 1.50 kJ/Kg K and that of Nepheline Syenite is Not Available. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Mylonite is heat resistant, impact resistant, pressure resistant whereas Nepheline Syenite is heat resistant, impact resistant, wear resistant.

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