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Gabbro and Trondhjemite


Trondhjemite and Gabbro


Definition

Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt   
Trondhjemite is a leucocratic (light-colored) intrusive igneous rock. It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase. Trondhjemites are sometimes known as plagiogranites.   

History
  
  

Origin
Germany   
Tonale, Italy   

Discoverer
Christian Leopold von Buch   
Unknown   

Etymology
From Latin glaber bare, smooth, bald   
Not Available   

Class
Igneous Rocks   
Igneous Rocks   

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

Family
  
  

Group
Plutonic   
Plutonic   

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

Texture

Texture
Phaneritic   
Phaneritic   

Color
Dark Grey to Black   
Black, Brown, Light to Dark Grey, White   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
Yes   

Wind Resistant
Yes   
No   

Acid Resistant
Yes   
No   

Appearance
Veined and Shiny   
Banded and Foilated   

Uses

Architecture
  
  

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

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate   
As Dimension Stone, Cement Manufacture, Cobblestones, Construction Aggregate, for Road Aggregate   

Medical Industry
Not Yet Used   
Not Yet Used   

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

Other Uses
  
  

Commercial Uses
Cemetery Markers, Commemorative Tablets, Laboratory bench tops, Jewelry, Sea Defence, Tombstones   
Cemetery Markers, Creating Artwork   

Types

Types
Not Available   
Not Available   

Features
Smooth to touch   
Is one of the oldest rock, Typically speckled black and white.   

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
Not Used   
Not Used   

Petroglyphs
Not Used   
Not Used   

Figurines
Used   
Used   

Fossils
Absent   
Absent   

Formation

Formation
Gabbro, a mafic rock, forms due to cooling and crystallization of magma underneath Earth's surface.   
When alkali feldspar is extracted from granite, it changes to granitoid and later, it becomes trondhjemite with quartz as major mineral.   

Composition
  
  

Mineral Content
Augite, Olivine, Plagioclase, Pyroxene   
Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Manganese Oxides, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon   

Compound Content
Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide   
NaCl, CaO, MgO, Silicon Dioxide   

Transformation
  
  

Metamorphism
Yes   
Yes   

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

Weathering
Yes   
Yes   

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

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
7   
6-7   

Grain Size
Coarse Grained   
Medium to Fine Coarse Grained   

Fracture
Conchoidal   
Conchoidal   

Streak
Black   
Bluish Black   

Porosity
Highly Porous   
Very Less Porous   

Luster
Not Available   
Subvitreous to Dull   

Compressive Strength
225.00 N/mm2   
7
Not Available   

Cleavage
Not Available   
Not Available   

Toughness
1.6   
2.1   

Specific Gravity
2.86-2.87   
2.86-3   

Transparency
Opaque   
Opaque   

Density
2.7-3.3 g/cm3   
2.73 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
Not Available   
0.92 kJ/Kg K   
10

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

Reserves

Deposits in Eastern Continents
  
  

Asia
India, Russia   
Not Yet Found   

Africa
South Africa   
Egypt   

Europe
Germany, Greece, Italy, Scotland, Turkey   
Finland, Germany, Italy, Romania, Sweden, Turkey   

Others
Greenland   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
USA   

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

Deposits in Oceania Continent
  
  

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

Summary >>
<< Reserves

All about Gabbro and Trondhjemite Properties

Know all about Gabbro and Trondhjemite properties here. All properties of rocks are important as they define the type of rock and its application. Gabbro and Trondhjemite belong to Igneous Rocks.Texture of Gabbro is Phaneritic whereas that of Trondhjemite is Phaneritic. Gabbro appears Veined and Shiny and Trondhjemite appears Banded and Foilated. The luster of Gabbro is not available while that of Trondhjemite is subvitreous to dull. Gabbro is available in dark grey to black colors whereas Trondhjemite is available in black, brown, light to dark grey, white colors. The commercial uses of Gabbro are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Trondhjemite are cemetery markers, creating artwork.

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