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Andesite and Jasperoid


Jasperoid and Andesite


Definition

Definition
Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava   
Jasperoid is a rare, peculiar type of metasomatic alteration of rocks   

History
  
  

Origin
North America   
USA   

Discoverer
Unknown   
Unknown   

Etymology
From Andes mountains, where it is found in abundance   
From silica, the main mineral content of Jasperoid   

Class
Igneous Rocks   
Sedimentary Rocks   

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

Family
  
  

Group
Volcanic   
Not Applicable   

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

Texture

Texture
Aphanitic to Porphyritic   
Earthy   

Color
Bluish - Grey, Grey, Pink, Yellow   
Black, Brown, Colourless, Green, Grey, Pink, White   

Maintenance
More   
Less   

Durability
Durable   
Durable   

Water Resistant
No   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
Yes   

Wind Resistant
No   
No   

Acid Resistant
Yes   
No   

Appearance
Dull and Soft   
Glassy or Pearly   

Uses

Architecture
  
  

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

Exterior Uses
Office Buildings, Roof Tiles   
As Building Stone, Garden Decoration, Office Buildings, Paving Stone   

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
Cobblestones, Construction Aggregate, for Road Aggregate   
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, Production of Glass and Ceramics, Serves as an Oil and Gas Reservoir rock   

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

Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines   
Artifacts, Jewellery, Monuments, Sculpture   

Other Uses
  
  

Commercial Uses
Commemorative Tablets, Creating Artwork   
An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux, Production of Lime, Soil Conditioner, Source of Magnesia (MgO)   

Types

Types
Icelandite   
Not Available   

Features
Generally rough to touch, High silica content, Is one of the oldest rock   
Host Rock for Lead, Traps for subsurface fluids like Oil and Natural Gas., Zinc and Copper Deposits   

Archaeological Significance
  
  

Monuments
Used   
Used   

Famous Monuments
Middle of the Earth in Ecuador   
Data Not Available   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Not Used   
Used   

Petroglyphs
Not Used   
Used   

Figurines
Used   
Used   

Fossils
Absent   
Present   

Formation

Formation
Andesite is a fine-grained igneous rock that forms when the magma is erupted onto the surface and is crystallized quickly.   
Jasperoid is a rare and peculiar type of metasomatic alteration of rocks. It is formed by extreme alteration of wall rocks within a shear zone which may occur in sediments, andesites, trachytes and basalts.   

Composition
  
  

Mineral Content
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon   
Clay Minerals, Pyrite, Quartz, Sulfides   

Compound Content
Silicon Dioxide   
NaCl, CaO, Carbon Dioxide, Magnesium Carbonate, MgO   

Transformation
  
  

Metamorphism
Yes   
Yes   

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

Weathering
Yes   
No   

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering   
Not Applicable   

Erosion
Yes   
No   

Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion   
Not Applicable   

Properties

Physical Properties
  
  

Hardness
7   
3.5-4   

Grain Size
Very fine-grained   
Medium to Fine Coarse Grained   

Fracture
Uneven   
Conchoidal   

Streak
White   
White   

Porosity
Less Porous   
Less Porous   

Luster
Vitreous   
Vitreous and Pearly   

Compressive Strength
225.00 N/mm2   
7
140.00 N/mm2   
15

Cleavage
Not Available   
Perfect   

Toughness
1.1   
1   

Specific Gravity
2.5-2.8   
2.8-3   

Transparency
Opaque   
Transparent to Translucent   

Density
2.11-2.36 g/cm3   
2.8-2.9 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
2.39 kJ/Kg K   
2
0.92 kJ/Kg K   
10

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

Reserves

Deposits in Eastern Continents
  
  

Asia
India, Indonesia, Japan, Nepal, South Korea   
China, India   

Africa
Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania   
Morocco, Namibia   

Europe
Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom   
Austria, Italy, Romania, Spain, Switzerland   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Mexico, USA   
Mexico, USA   

South America
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela   
Brazil, Colombia   

Deposits in Oceania Continent
  
  

Australia
New South Wales, New Zealand, Western Australia   
New South Wales, Queensland, Yorke Peninsula   

Summary >>
<< Reserves

All about Andesite and Jasperoid Properties

Know all about Andesite and Jasperoid properties here. All properties of rocks are important as they define the type of rock and its application. Andesite belongs to Igneous Rocks while Jasperoid belongs to Sedimentary Rocks.Texture of Andesite is Aphanitic to Porphyritic whereas that of Jasperoid is Earthy. Andesite appears Dull and Soft and Jasperoid appears Glassy or Pearly. The luster of Andesite is vitreous while that of Jasperoid is vitreous and pearly. Andesite is available in bluish - grey, grey, pink, yellow colors whereas Jasperoid is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Andesite are commemorative tablets, creating artwork and that of Jasperoid are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo).

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