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Borolanite and Adakite


Adakite and Borolanite


Definition

Definition
Borolanite is a variety of Nepheline Syenite and belongs to igneous rocks and contains nepheline-alkali feldspar pseudomorphs which occur as conspicuous white spots in the dark rock matrix  
Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs  

History
  
  

Origin
Scotland  
Adak, Aleutian Islands  

Discoverer
Unknown  
Defant and Drummond  

Etymology
From Alkalic Igneous complex near Loch Borralan in northwest Scotland  
From Adak, Aleutian Islands  

Class
Igneous Rocks  
Igneous Rocks  

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

Family
  
  

Group
Plutonic  
Volcanic  

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

Texture

Texture
Granular  
Porphyritic  

Color
Brown, Buff, Cream, Green, Grey, Pink, White  
Black, Brown, Light to Dark Grey  

Maintenance
Less  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
No  

Scratch Resistant
No  
No  

Stain Resistant
No  
No  

Wind Resistant
Yes  
Yes  

Acid Resistant
Yes  
Yes  

Appearance
Banded and Foilated  
Dull and Soft  

Uses

Architecture
  
  

Interior Uses
Countertops, Decorative Aggregates, Flooring, Homes, Interior Decoration  
Decorative Aggregates, Floor Tiles, Homes, Hotels, Kitchens  

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  
Whetstones  

Industry
  
  

Construction Industry
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Production of Glass and Ceramics  
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone  

Medical Industry
-  
-  

Antiquity Uses
Artifacts  
Monuments, Sculpture, Small Figurines  

Other Uses
  
  

Commercial Uses
Cemetery Markers  
Commemorative Tablets, Pottery, Used in aquariums  

Types

Types
-  
Intermediate volcanic rock  

Features
Application of acids on the surface causes cloudy frosting, Available in Lots of Colors and Patterns, Dissolves in hydrochloric acid, Is one of the oldest rock  
Has High structural resistance against erosion and climate, Host rock for Diamond, Very fine grained rock  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
Borolanites are formed due to alkaline igneous activities and are generally formed in thick continental crustal areas or in Cordilleran subduction zones.  
Adakite rocks are formed when the hydrous fluids are released from minerals that break down in metamorphosed basalt, and rise into the mantle they initiate partial melting.  

Composition
  
  

Mineral Content
Albite, Amphibole, Biotite, Cancrinite, Feldspar, Hornblende, Plagioclase, Pyroxene, Sodalite  
Olivine, Plagioclase, Pyroxene  

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

Transformation
  
  

Metamorphism
Yes  
Yes  

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

Weathering
Yes  
Yes  

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

Erosion
Yes  
Yes  

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

Properties

Physical Properties
  
  

Hardness
5.5-6  
3-4  

Grain Size
Fine Grained  
Fine to Medium Grained  

Fracture
Conchoidal to Uneven  
Conchoidal  

Streak
White  
Bluish Black  

Porosity
Less Porous  
Less Porous  

Luster
Greasy to Dull  
Grainy, Pearly and Vitreous  

Compressive Strength
150.00 N/mm2  
22
200.00 N/mm2  
13

Cleavage
-  
-  

Toughness
-  
-  

Specific Gravity
2.6  
-9999  

Transparency
Translucent to Opaque  
Opaque  

Density
2.6 g/cm3  
-9999 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.84 kJ/Kg K  
15
0.84 kJ/Kg K  
15

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

Reserves

Deposits in Eastern Continents
  
  

Asia
Indonesia, Iran, Russia, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Turkmenistan, Vietnam  
India, Russia  

Africa
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa  
Ethiopia, Somalia, South Africa  

Europe
Andorra, Finland, France, Great Britain, Italy, Norway, Portugal, Spain, Sweden  
Iceland  

Others
Greenland  
-  

Deposits in Western Continents
  
  

North America
Canada, USA  
Canada, USA  

South America
Brazil, Chile, Colombia, Uruguay, Venezuela  
Brazil  

Deposits in Oceania Continent
  
  

Australia
New Zealand, Queensland, South Australia, Tasmania, Western Australia  
-  

Summary >>
<< Reserves

All about Borolanite and Adakite Properties

Know all about Borolanite and Adakite properties here. All properties of rocks are important as they define the type of rock and its application. Borolanite and Adakite belong to Igneous Rocks.Texture of Borolanite is Granular whereas that of Adakite is Porphyritic. Borolanite appears Banded and Foilated and Adakite appears Dull and Soft. The luster of Borolanite is greasy to dull while that of Adakite is grainy, pearly and vitreous. Borolanite is available in brown, buff, cream, green, grey, pink, white colors whereas Adakite is available in black, brown, light to dark grey colors. The commercial uses of Borolanite are cemetery markers and that of Adakite are commemorative tablets, pottery, used in aquariums.

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