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Trachyte and Lherzolite


Lherzolite and Trachyte


Definition

Definition
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar   
Lherzolite is a type of ultramafic igneous rock which contains essential olivine and clinopyroxene and orthopyroxene in equal proportions   

History
  
  

Origin
Unknown   
France   

Discoverer
Alexandre Brongniart and René Just Haüy   
Unknown   

Etymology
From Greek trakhus rough’ or trakhutēs roughness   
From the Lherz Massif, an alpine peridotite complex, at Étang de Lers, near Massat in the French Pyrenees; Lherz is the archaic spelling of this location   

Class
Igneous Rocks   
Igneous Rocks   

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

Family
  
  

Group
Volcanic   
Plutonic   

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

Texture

Texture
Aphanitic to Porphyritic   
Grenue   

Color
Black, Brown, Dark Greenish - Grey, Green, Grey, Light to Dark Grey, White   
Black, Dark Greenish - Grey, Green, Pink, Purple   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
No   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
Yes   

Wind Resistant
Yes   
No   

Acid Resistant
No   
Yes   

Appearance
Banded   
Glassy, Vesicular and Foilated   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Flooring, Homes, Interior Decoration   
Decorative Aggregates, Entryways, Homes, Interior Decoration   

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories   
Landscaping, Manufacture of Magnesium and Dolomite Refractories, Used for flooring, stair treads, borders and window sills.   

Medical Industry
Not Yet Used   
Not Yet Used   

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

Other Uses
  
  

Commercial Uses
Cemetery Markers, Creating Artwork   
As armour rock for sea walls, Source of Magnesia (MgO), Used in aquariums   

Types

Types
Not Available   
Garnet Lherzolite   

Features
Available in Lots of Colors and Patterns, Is one of the oldest rock, Matrix variable   
Host Rock for Lead   

Archaeological Significance
  
  

Monuments
Used   
Not Yet Used   

Famous Monuments
Data Not Available   
Not Applicable   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Used   
Not Used   

Petroglyphs
Used   
Not Used   

Figurines
Used   
Used   

Fossils
Absent   
Absent   

Formation

Formation
Trachyte is an igneous volcanic rock with an aphanitic to porphyritic texture. It is the volcanic equivalent of syenite rock and forms as a result of magmatic differentiation.   
Lherzolite 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.   

Composition
  
  

Mineral Content
Augite, Biotite, Feldspar, Hornblade, Plagioclase, Quartz   
Harzburgite, Olivine, Pyroxene, Pyrrhotite   

Compound Content
Potassium Oxide, Sodium Oxide, Silicon Dioxide   
CaO, Cr, Chromium(III) Oxide, MgO   

Transformation
  
  

Metamorphism
Yes   
Yes   

Types of Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism   
Cataclastic Metamorphism, Contact Metamorphism   

Weathering
Yes   
Yes   

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

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
6   
6.5   

Grain Size
Fine Grained   
Fine Grained   

Fracture
Not Available   
Conchoidal   

Streak
White   
White   

Porosity
Less Porous   
Less Porous   

Luster
Metallic   
Subvitreous to Dull   

Compressive Strength
150.00 N/mm2   
14
290.00 N/mm2   
3

Cleavage
Not Available   
Perfect   

Toughness
Not Available   
2.7   

Specific Gravity
2.7   
2.86   

Transparency
Opaque   
Opaque   

Density
2.43-2.45 g/cm3   
2.8-2.9 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
Not Available   
0.95 kJ/Kg K   
9

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

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam   
Russia, South Korea   

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

Europe
Bulgaria, England, Germany, Norway, Romania, Switzerland   
United Kingdom   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
USA   
USA   

South America
Brazil, Chile   
Not Yet Found   

Deposits in Oceania Continent
  
  

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

Summary >>
<< Reserves

All about Trachyte and Lherzolite Properties

Know all about Trachyte and Lherzolite properties here. All properties of rocks are important as they define the type of rock and its application. Trachyte and Lherzolite belong to Igneous Rocks.Texture of Trachyte is Aphanitic to Porphyritic whereas that of Lherzolite is Grenue. Trachyte appears Banded and Lherzolite appears Glassy, Vesicular and Foilated. The luster of Trachyte is metallic while that of Lherzolite is subvitreous to dull. Trachyte is available in black, brown, dark greenish - grey, green, grey, light to dark grey, white colors whereas Lherzolite is available in black, dark greenish - grey, green, pink, purple colors. The commercial uses of Trachyte are cemetery markers, creating artwork and that of Lherzolite are as armour rock for sea walls, source of magnesia (mgo), used in aquariums.

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