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Metapelite and Soapstone


Soapstone and Metapelite


Definition

Definition
Metapelite is an old and currently not widely used field geological term for a clay rich fine-grained clastic sediment or sedimentary rock, i.e. mud or a mudstone  
It is a metamorphic magnesium rich rock because it is composed of the mineral talc  

History
  
  

Origin
-  
USA  

Discoverer
Unknown  
Unknown  

Etymology
From Pelos or clay in Greek  
From 17th century, because of its greasy feel and use like a soap  

Class
Metamorphic Rocks  
Metamorphic Rocks  

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

Family
  
  

Group
-  
-  

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

Texture

Texture
Foliated  
Polished  

Color
Dark Greenish - Grey, Green, Light Green, Light Greenish Grey  
Black, Black to Grey, Green, Grey  

Maintenance
Less  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
Yes  

Scratch Resistant
Yes  
No  

Stain Resistant
Yes  
No  

Wind Resistant
No  
No  

Acid Resistant
No  
No  

Appearance
Banded  
Dull, Banded and Foilated  

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Interior Decoration  
Bathrooms, Decorative Aggregates, Homes, Interior Decoration  

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

Other Architectural Uses
Curbing  
Curbing  

Industry
  
  

Construction Industry
Cement Manufacture, Construction Aggregate, for Road Aggregate  
Manufacture of Magnesium and Dolomite Refractories  

Medical Industry
-  
Taken as a Supplement for Calcium or Magnesium  

Antiquity Uses
Artifacts  
Artifacts, Jewellery, Monuments, Sculpture  

Other Uses
  
  

Commercial Uses
Commemorative Tablets, Creating Artwork  
Cemetery Markers, Creating Artwork, Gemstone, Jewelry, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Production of Lime, Source of Magnesia (MgO)  

Types

Types
Metamorphic rock  
Metamorphic rock  

Features
Easily splits into thin plates, It is One of the Oldest, Strongest and Hardest Rock  
Host Rock for Lead  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
Christ the Redeemer in Rio de Janeiro, Stonehenge in English county of Wiltshire  

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. Metapelite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.  
Soapstone is a talc-schist, which is a type of metamorphic rock and it is largely composed of the mineral talc and is thus rich inmagnesium.   

Composition
  
  

Mineral Content
Albite, Chlorite, Quartz  
Albite, Apatite, Biotite, Calcite, Carbonate, Clay Minerals, Hornblende, Ilmenite, Micas, Plagioclase, Pyroxene, Quartz  

Compound Content
Aluminium Oxide, CaO, MgO  
CaO, Mg, MgO  

Transformation
  
  

Metamorphism
No  
Yes  

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

Weathering
Yes  
No  

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

Erosion
Yes  
No  

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

Properties

Physical Properties
  
  

Hardness
5-6  
1  

Grain Size
Medium to Fine Coarse Grained  
Fine Grained  

Fracture
Fibrous  
Conchoidal  

Streak
-  
Black  

Porosity
Highly Porous  
Less Porous  

Luster
Earthy  
Greasy  

Compressive Strength
40.00 N/mm2  
40
225.00 N/mm2  
8

Cleavage
-  
Perfect  

Toughness
-  
1  

Specific Gravity
3.4-3.7  
2.86  

Transparency
Opaque  
Opaque  

Density
0-300 g/cm3  
2.8-2.9 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.72 kJ/Kg K  
22
0.88 kJ/Kg K  
13

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

Reserves

Deposits in Eastern Continents
  
  

Asia
-  
China, India, Indonesia, Japan, North Korea, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Tajikistan, Thailand  

Africa
Western Africa  
Egypt, Ethiopia, Ghana, South Africa, Western Africa  

Europe
United Kingdom  
Austria, England, Finland, France, Germany, Greece, Spain, Sweden, Switzerland, United Kingdom  

Others
-  
-  

Deposits in Western Continents
  
  

North America
-  
Canada, USA  

South America
Brazil, Colombia, Ecuador  
Colombia  

Deposits in Oceania Continent
  
  

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

Summary >>
<< Reserves

All about Metapelite and Soapstone Properties

Know all about Metapelite and Soapstone properties here. All properties of rocks are important as they define the type of rock and its application. Metapelite and Soapstone belong to Metamorphic Rocks.Texture of Metapelite is Foliated whereas that of Soapstone is Polished. Metapelite appears Banded and Soapstone appears Dull, Banded and Foilated. The luster of Metapelite is earthy while that of Soapstone is greasy. Metapelite is available in dark greenish - grey, green, light green, light greenish grey colors whereas Soapstone is available in black, black to grey, green, grey colors. The commercial uses of Metapelite are commemorative tablets, creating artwork and that of Soapstone are cemetery markers, creating artwork, gemstone, jewelry, manufacture of soap, solvents, dyes, plastics and fibres, production of lime, source of magnesia (mgo).

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