Alkali Feldspar Granite and Adakite

Adakite

Definition

Alkali feldspar granite, also known as red granite, is a felsic igneous rock and a type of granite rich in the mineral potassium feldspar

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

Unknown

Adak, Aleutian Islands

Discoverer

Unknown

Defant and Drummond

Etymology

From mineral fledspar which is present in large quantities in this rock

From Adak, Aleutian Islands

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

Family

Group

Plutonic

Volcanic

Other Categories

Coarse Grained Rock, Opaque Rock

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Phaneritic

Porphyritic

Color

Black, Grey, Orange, Pink, White

Black, Brown, Light to Dark Grey

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Yes

Wind Resistant

Yes

Acid Resistant

Yes

Appearance

Veined or Pebbled

Dull and Soft

Uses

Architecture

Interior Uses

Bathrooms, Countertops, Decorative Aggregates, Entryways, Floor Tiles, Homes, Hotels, Kitchens, Stair Treads

Decorative Aggregates, Floor Tiles, Homes, Hotels, Kitchens

Exterior Uses

As Building Stone, As Facing Stone, Bridges, Paving Stone, Near Swimming Pools, Office Buildings, Resorts

As Building Stone, As Facing Stone, Office Buildings

Other Architectural Uses

Curbing

Whetstones

Industry

Construction Industry

As Dimension Stone

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

Medical Industry

Not Yet Used

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Curling, Gemstone, Laboratory bench tops, Tombstones

Commemorative Tablets, Pottery, Used in aquariums

Types

Not Available

Features

Available in Lots of Colors and Patterns, It is One of the Oldest, Strongest and Hardest Rock

Has High structural resistance against erosion and climate, Host rock for Diamond, Very fine grained rock

Archaeological Significance

Monuments

Used

Famous Monuments

Data Not Available

Sculpture

Used

Famous Sculptures

Data Not Available

Pictographs

Not Used

Used

Petroglyphs

Not Used

Used

Figurines

Used

Fossils

Absent

Formation

Alkali fledspar granite is an intrusive igneous rock which is very hard, crystalline and is visibly homogeneous in texture and forms by melting of continental rocks.

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

Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz

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

Types of Metamorphism

Burial Metamorphism, Contact Metamorphism, Impact Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

Yes

Types of Weathering

Chemical Weathering

Chemical Weathering, Mechanical Weathering

Erosion

Yes

Types of Erosion

Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion

Coastal Erosion, Sea Erosion, Water Erosion

Properties

Physical Properties

Hardness

6-7

3-4

Grain Size

Large and Coarse Grained

Fine to Medium Grained

Fracture

Not Available

Conchoidal

Streak

White

Bluish Black

Porosity

Less Porous

Luster

Dull to Grainy with Sporadic parts Pearly and Vitreous

Grainy, Pearly and Vitreous

Compressive Strength

175.00 N/mm²

Not Available

Cleavage

Not Available

Toughness

Not Available

Specific Gravity

2.6-2.7

Not Available

Transparency

Opaque

Density

2.6-2.8 g/cm³

Not Available

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K

Not Available

Resistance

Heat Resistant, Wear Resistant

Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam

India, Russia

Africa

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

Ethiopia, Somalia, South Africa

Europe

Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic, Venezuela

Iceland

Others

Not Yet Found

Deposits in Western Continents

North America

Canada, USA

South America

Not Yet Found

Brazil

Deposits in Oceania Continent

Australia

Not Yet Found

Summary >>

<< Reserves

All about Alkali Feldspar Granite and Adakite Properties

Know all about Alkali Feldspar Granite and Adakite properties here. All properties of rocks are important as they define the type of rock and its application. Alkali Feldspar Granite and Adakite belong to Igneous Rocks.Texture of Alkali Feldspar Granite is Phaneritic whereas that of Adakite is Porphyritic. Alkali Feldspar Granite appears Veined or Pebbled and Adakite appears Dull and Soft. The luster of Alkali Feldspar Granite is dull to grainy with sporadic parts pearly and vitreous while that of Adakite is grainy, pearly and vitreous. Alkali Feldspar Granite is available in black, grey, orange, pink, white colors whereas Adakite is available in black, brown, light to dark grey colors. The commercial uses of Alkali Feldspar Granite are curling, gemstone, laboratory bench tops, tombstones and that of Adakite are commemorative tablets, pottery, used in aquariums.