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Tephrite and Granodiorite


Granodiorite and Tephrite


Definition

Definition
Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock  
Granodiorite is a coarse-grained intrusive igneous rock containing quartz and plagioclase, and which has composition in between granite and diorite  

History
  
  

Origin
Germany  
-  

Discoverer
Van Tooren  
Unknown  

Etymology
From Greek tephra, ashes from Indo-European base, to burn  
From granite + diorite  

Class
Igneous Rocks  
Igneous Rocks  

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

Family
  
  

Group
Volcanic  
Plutonic  

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

Texture

Texture
Aphanitic to Porphyritic  
Granular, Phaneritic  

Color
Black, Brown, Green, Grey, White  
Black, Grey, Orange, Pink, White  

Maintenance
Less  
More  

Durability
Durable  
Durable  

Water Resistant
Yes  
Yes  

Scratch Resistant
Yes  
Yes  

Stain Resistant
No  
No  

Wind Resistant
Yes  
Yes  

Acid Resistant
No  
No  

Appearance
Vesicular  
Veined or Pebbled  

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Flooring, Homes, Interior Decoration  
Bathrooms, Countertops, Decorative Aggregates, Entryways, Floor Tiles, Flooring, Homes, Hotels, Interior Decoration, Stair Treads  

Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings  
As Building Stone, Bridges, Paving Stone, Garden Decoration, Office Buildings, Resorts  

Other Architectural Uses
Curbing  
-  

Industry
  
  

Construction Industry
Landscaping  
As Dimension Stone  

Medical Industry
-  
-  

Antiquity Uses
Artifacts, Sculpture  
Artifacts, Monuments, Sculpture  

Other Uses
  
  

Commercial Uses
Production of Lime, Soil Conditioner  
Curling, Gemstone, Laboratory bench tops, Tombstones  

Types

Types
Igneous rock  
Granodiorite  

Features
Host Rock for Lead  
Available in Lots of Colors and Patterns  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
Tephrite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.  
Granodiorite is an intrusive igneous rock which is very hard, crystalline and is visibly homogeneous in texture and forms by melting of continental rocks.  

Composition
  
  

Mineral Content
Alkali feldspar, Nepheline, Plagioclase, Pyroxene  
Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz  

Compound Content
CaO, Carbon Dioxide, MgO, Silicon Dioxide  
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide  

Transformation
  
  

Metamorphism
Yes  
Yes  

Types of Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism  
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism  

Weathering
Yes  
Yes  

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

Erosion
Yes  
Yes  

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

Properties

Physical Properties
  
  

Hardness
6.5  
6  

Grain Size
Medium to Fine Coarse Grained  
Medium to Coarse Grained  

Fracture
Uneven  
-  

Streak
Bluish Black  
White  

Porosity
Very Less Porous  
Less Porous  

Luster
Subvitreous to Dull  
Grainy, Pearly and Vitreous  

Compressive Strength
90.00 N/mm2  
32
175.00 N/mm2  
20

Cleavage
Crenulation and Pervasive  
-  

Toughness
2.4  
-  

Specific Gravity
2.86  
2.6-2.7  

Transparency
Opaque  
Opaque  

Density
2.8-2.9 g/cm3  
2.6-2.8 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.92 kJ/Kg K  
10
0.79 kJ/Kg K  
17

Resistance
Heat Resistant, Impact Resistant  
Heat Resistant, Wear Resistant  

Reserves

Deposits in Eastern Continents
  
  

Asia
-  
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam  

Africa
Namibia, Uganda  
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa  

Europe
Germany, Hungary, Italy, Portugal, Spain  
Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic  

Others
-  
-  

Deposits in Western Continents
  
  

North America
USA  
Canada, USA  

South America
-  
-  

Deposits in Oceania Continent
  
  

Australia
New Zealand, Western Australia  
-  

Summary >>
<< Reserves

All about Tephrite and Granodiorite Properties

Know all about Tephrite and Granodiorite properties here. All properties of rocks are important as they define the type of rock and its application. Tephrite and Granodiorite belong to Igneous Rocks.Texture of Tephrite is Aphanitic to Porphyritic whereas that of Granodiorite is Granular, Phaneritic. Tephrite appears Vesicular and Granodiorite appears Veined or Pebbled. The luster of Tephrite is subvitreous to dull while that of Granodiorite is grainy, pearly and vitreous. Tephrite is available in black, brown, green, grey, white colors whereas Granodiorite is available in black, grey, orange, pink, white colors. The commercial uses of Tephrite are production of lime, soil conditioner and that of Granodiorite are curling, gemstone, laboratory bench tops, tombstones.

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