Adakite

Hornblendite

Adakite and Hornblendite

Adakite

Hornblendite

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1 Definition

1.1 Definition

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

Hornblendite is a type of igneous plutonic rock consisting mainly of amphibole hornblende and is a type of Amphibolite rock

1.2 History

1.2.1 Origin

Adak, Aleutian Islands

Unknown

1.2.2 Discoverer

Defant and Drummond

Unknown

1.3 Etymology

From Adak, Aleutian Islands

From German, Horn horn + blende

1.4 Class

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Volcanic

Plutonic

1.6 Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Medium Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Porphyritic

Banded, Foliated, Massive

2.2 Color

Black, Brown, Light to Dark Grey

Black, Brown, Green, Grey

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.4 Wind Resistant

✔ ✘

2.4.5 Acid Resistant

✔ ✘

2.5 Appearance

Dull and Soft

Foliated

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Hotels, Kitchens

Countertops, Decorative Aggregates, Entryways, Flooring, Homes, Hotels, Interior Decoration, Kitchens

3.1.2 Exterior Uses

As Building Stone, As Facing Stone, Office Buildings

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

3.1.3 Other Architectural Uses

Whetstones

Curbing

3.2 Industry

3.2.1 Construction Industry

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

As Dimension Stone, Building houses or walls, Cobblestones, Construction Aggregate, for Road Aggregate, Landscaping, Production of Glass and Ceramics, Roadstone

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Monuments, Sculpture, Small Figurines

Artifacts, Sculpture, Small Figurines

3.4 Other Uses

3.4.1 Commercial Uses

Commemorative Tablets, Pottery, Used in aquariums

Cemetery Markers, Commemorative Tablets, Creating Artwork

4 Types

4.1 Types

Not Available

Hornblende Gabbro and Hornblende Peridotite

4.2 Features

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

Clasts are smooth to touch, Matrix variable, Surfaces are often shiny

4.3 Archaeological Significance

4.3.1 Monuments

Used

Not Yet Used

4.3.2 Famous Monuments

Data Not Available

Not Applicable

4.3.3 Sculpture

Used

4.3.4 Famous Sculptures

Data Not Available

4.3.5 Pictographs

Used

Not Used

4.3.6 Petroglyphs

Used

Not Used

4.3.7 Figurines

Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

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.

Hornblendite 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.

5.2 Composition

5.2.1 Mineral Content

Olivine, Plagioclase, Pyroxene

Amphibole, Calcite, Hornblade, Magnetite, Plagioclase, Wollastonite

5.2.2 Compound Content

Aluminium Oxide, MgO, Silicon Dioxide

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

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism

Not Applicable

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Chemical Weathering, Mechanical Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Coastal Erosion, Sea Erosion, Water Erosion

Chemical Erosion, Water Erosion, Wind Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

3-46-7

1 7

1.2.1 Grain Size

Fine to Medium Grained

Medium to Coarse Grained

1.3.1 Fracture

Conchoidal

Irregular to Conchoidal

1.4.1 Streak

Bluish Black

White to Grey

1.4.3 Porosity

Less Porous

1.4.4 Luster

Grainy, Pearly and Vitreous

Vitreous to Dull

1.4.5 Compressive Strength

NANA

0.15 450

1.5.1 Cleavage

Not Available

Irregular

1.5.2 Toughness

Not Available

2.3

1.5.3 Specific Gravity

Not Available2.5

0 8.4

1.5.4 Transparency

Opaque

1.5.5 Density

Not Available2.85-3.07 g/cm³

0 1400

1.6 Thermal Properties

1.6.1 Specific Heat Capacity

NANA

0.14 3.2

1.6.2 Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

2 Reserves

2.1 Deposits in Eastern Continents

2.1.1 Asia

India, Russia

Russia, Turkey

2.1.2 Africa

Ethiopia, Somalia, South Africa

Burundi, Djibouti, Eritrea, Ethiopia, Kenya, Madagascar, Rwanda, Somalia, South Africa, Sudan, Tanzania, Uganda

2.1.3 Europe

Iceland

Germany, Greece, Iceland, Norway, Poland

2.1.4 Others

Not Yet Found

2.2 Deposits in Western Continents

2.2.1 North America

Canada, USA

2.2.2 South America

Brazil

2.3 Deposits in Oceania Continent

2.3.1 Australia

Not Yet Found

South Australia, Western Australia

All about Adakite and Hornblendite Properties

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