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Serpentinite and Pseudotachylite


Pseudotachylite and Serpentinite


Definition

Definition
A hydration and metamorphic transformation of ultramafic rock from the Earth's mantle is called as serpentinization, a group of minerals is formed by serpentinization compose rock 'serpentinite'.  
Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.  

History
  
  

Origin
USA  
USA  

Discoverer
Unknown  
Unknown  

Etymology
From English word serpentinization.  
From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.  

Class
Metamorphic Rocks  
Metamorphic Rocks  

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

Family
  
  

Group
-  
-  

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

Texture

Texture
Earthy  
Quench  

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

Maintenance
Less  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
Yes  

Scratch Resistant
No  
Yes  

Stain Resistant
Yes  
No  

Wind Resistant
No  
Yes  

Acid Resistant
No  
Yes  

Appearance
Rough and Dull  
Dull and Soft  

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Interior Decoration  
Decorative Aggregates, Entryways, Interior Decoration  

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

Other Architectural Uses
Curbing  
Curbing  

Industry
  
  

Construction Industry
As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement  
As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement  

Medical Industry
-  
-  

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

Other Uses
  
  

Commercial Uses
Commemorative Tablets, Creating Artwork  
Creating Artwork, Gemstone  

Types

Types
Jadeitite  
Cataclastic rock  

Features
Host Rock for Lead  
Host Rock for Lead  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Serpentinite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.  
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Pseudotachylite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.  

Composition
  
  

Mineral Content
Carbonate, Magnetite, Pyrrhotite, Serpentine, Sulfides  
Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides  

Compound Content
Ca, CaO, Carbon Dioxide, KCl, MgO, Sulfur Dioxide, Sulphur  
Carbon Dioxide, Silicon Dioxide, Sulfur Dioxide, Sulphur  

Transformation
  
  

Metamorphism
Yes  
Yes  

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

Weathering
No  
No  

Types of Weathering
-  
-  

Erosion
Yes  
No  

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

Properties

Physical Properties
  
  

Hardness
3-5  
7  

Grain Size
Very fine-grained  
Very fine-grained  

Fracture
Uneven  
Uneven  

Streak
White, Greenish White or Grey  
Light to dark brown  

Porosity
Less Porous  
Less Porous  

Luster
Waxy and Dull  
Vitreous  

Compressive Strength
310.00 N/mm2  
2
60.00 N/mm2  
37

Cleavage
-  
-  

Toughness
7  
-  

Specific Gravity
2.79-3  
2.46-2.86  

Transparency
Opaque  
Transparent to Translucent  

Density
2.5-3 g/cm3  
2.7-2.9 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.95 kJ/Kg K  
9
0.92 kJ/Kg K  
10

Resistance
Heat Resistant  
Heat Resistant  

Reserves

Deposits in Eastern Continents
  
  

Asia
India, Saudi Arabia, Singapore, South Korea  
South Korea  

Africa
Ethiopia, Western Africa  
Western Africa  

Europe
England, Georgia, Switzerland, United Kingdom  
Great Britain, Switzerland  

Others
-  
-  

Deposits in Western Continents
  
  

North America
Canada  
-  

South America
Colombia  
-  

Deposits in Oceania Continent
  
  

Australia
Central Australia, New South Wales, New Zealand, Western Australia  
Central Australia, Western Australia  

Summary >>
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All about Serpentinite and Pseudotachylite Properties

Know all about Serpentinite and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Serpentinite and Pseudotachylite belong to Metamorphic Rocks.Texture of Serpentinite is Earthy whereas that of Pseudotachylite is Quench. Serpentinite appears Rough and Dull and Pseudotachylite appears Dull and Soft. The luster of Serpentinite is waxy and dull while that of Pseudotachylite is vitreous. Serpentinite is available in black, brown, green, grey, white colors whereas Pseudotachylite is available in black, brown, green, grey, pink, white colors. The commercial uses of Serpentinite are commemorative tablets, creating artwork and that of Pseudotachylite are creating artwork, gemstone.

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