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Carbonatite and Greywacke


Greywacke and Carbonatite


Definition

Definition
Carbonatite is intrusive or extrusive igneous rock which is defined by mineralogic composition, consisting of greater than 50 percent carbonate minerals   
Greywacke is defined as a dark coarse-grained sandstone rock which contains more than 15 per cent clay   

History
  
  

Origin
Tanzania   
Unknown   

Discoverer
Unknown   
Unknown   

Etymology
From any intrusive igneous rock, having a majority of carbonate minerals   
From German Grauwacke, from grau grey + wacke   

Class
Igneous Rocks   
Sedimentary Rocks   

Sub-Class
Durable Rock, Soft Rock   
Durable Rock, Hard Rock   

Family
  
  

Group
Plutonic   
Not Applicable   

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

Texture

Texture
Granular, Poikiloblastic   
Clastic   

Color
Black, Brown, Colourless, Green, Grey, Pink, White   
Beige, Black, Brown, Colourless, Cream, Dark Brown, Green, Grey, Light Green, Light to Dark Grey, Pink, Red, White, Yellow   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
No   
Yes   

Stain Resistant
No   
Yes   

Wind Resistant
No   
Yes   

Acid Resistant
No   
No   

Appearance
Dull, Banded and Foilated   
Dull   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Interior Decoration   
Decorative Aggregates, Floor Tiles, Flooring, Homes, Interior Decoration   

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

Other Architectural Uses
Curbing   
Curbing, Whetstones   

Industry
  
  

Construction Industry
As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Unknown, Unknown   
Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Raw material for the manufacture of mortar   

Medical Industry
Taken as a Supplement for Calcium or Magnesium   
Not Yet Used   

Antiquity Uses
Artifacts   
Artifacts, Sculpture, Small Figurines   

Other Uses
  
  

Commercial Uses
An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux   
As armour rock for sea walls, Petroleum reservoirs, Sea Defence, Tombstones   

Types

Types
Not Available   
Not Available   

Features
Available in lots of colors, Generally rough to touch, Is one of the oldest rock   
Available in Lots of Colors and Patterns, Generally rough to touch, Non-vesicular, Veined   

Archaeological Significance
  
  

Monuments
Not Yet Used   
Not Yet Used   

Famous Monuments
Not Applicable   
Not Applicable   

Sculpture
Not Yet Used   
Used   

Famous Sculptures
Not Applicable   
Data Not Available   

Pictographs
Used   
Not Used   

Petroglyphs
Used   
Not Used   

Figurines
Not Yet Used   
Used   

Fossils
Absent   
Present   

Formation

Formation
Carbonatites are intrusive or extrusive igneous rocks which are defined by mineralogic composition consisting of greater than 50 percent carbonate minerals and are formed due to low degrees of partial melting of rocks.   
Graywacke rock is a type of sedimentary rock, which is also known as immature sandstone, which is indurated, dark grey and consisting of poorly sorted angular to sub-angular, sand-sized grains.   

Composition
  
  

Mineral Content
Ancylite, Apatite, Barite, Fluorite, Magnetite, Natrolite, Sodalite   
Augite, Biotite, Calcite, Chlorite, Clay, Clay Minerals, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz   

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

Transformation
  
  

Metamorphism
Yes   
No   

Types of Metamorphism
Burial Metamorphism, Contact Metamorphism   
Not Applicable   

Weathering
Yes   
Yes   

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

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
3   
6-7   

Grain Size
Medium to Fine Coarse Grained   
Angular and Fine   

Fracture
Conchoidal   
Conchoidal   

Streak
White   
White   

Porosity
Less Porous   
Highly Porous   

Luster
Subvitreous to Dull   
Dull   

Cleavage
Not Available   
Perfect   

Toughness
1   
2.6   

Specific Gravity
2.86-2.87   
2.2-2.8   

Transparency
Opaque   
Opaque   

Density
2.84-2.86 g/cm3   
2.6-2.61 g/cm3   

Thermal Properties
  
  

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

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Kazakhstan, Mongolia, Russia, Uzbekistan   
China, India, Kazakhstan, Mongolia, Russia, Uzbekistan   

Africa
Namibia, Nigeria, South Africa   
Namibia, Nigeria, South Africa   

Europe
Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom   
Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom   

Others
Greenland   
Greenland   

Deposits in Western Continents
  
  

North America
Canada, USA   
Canada, USA   

South America
Brazil   
Brazil   

Deposits in Oceania Continent
  
  

Australia
New South Wales, New Zealand   
New South Wales, New Zealand   

Summary >>
<< Reserves

All about Carbonatite and Greywacke Properties

Know all about Carbonatite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Carbonatite belongs to Igneous Rocks while Greywacke belongs to Sedimentary Rocks.Texture of Carbonatite is Granular, Poikiloblastic whereas that of Greywacke is Clastic. Carbonatite appears Dull, Banded and Foilated and Greywacke appears Dull. The luster of Carbonatite is subvitreous to dull while that of Greywacke is dull. Carbonatite is available in black, brown, colourless, green, grey, pink, white colors whereas Greywacke is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Carbonatite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.

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