Adakite

Jasperoid

Adakite and Jasperoid

Adakite

Jasperoid

Add ⊕

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

Jasperoid is a rare, peculiar type of metasomatic alteration of rocks

History

Origin

Adak, Aleutian Islands

USA

Discoverer

Defant and Drummond

Unknown

Etymology

From Adak, Aleutian Islands

From silica, the main mineral content of Jasperoid

Class

Igneous Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Porphyritic

Earthy

Color

Black, Brown, Light to Dark Grey

Black, Brown, Green, Grey, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull and Soft

Glassy or Pearly

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Hotels, Kitchens

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Office Buildings

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

Other Architectural Uses

Whetstones

Curbing

Industry

Construction Industry

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Production of Glass and Ceramics, Serves as an Oil and Gas Reservoir rock

Medical Industry

Taken as a Supplement for Calcium or Magnesium

Antiquity Uses

Monuments, Sculpture, Small Figurines

Artifacts, Jewellery, Monuments, Sculpture

Other Uses

Commercial Uses

Commemorative Tablets, Pottery, Used in aquariums

An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux, Production of Lime, Soil Conditioner, Source of Magnesia (MgO)

Types

Intermediate volcanic rock

Features

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

Host Rock for Lead, Traps for subsurface fluids like Oil and Natural Gas., Zinc and Copper Deposits

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

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.

Jasperoid is a rare and peculiar type of metasomatic alteration of rocks. It is formed by extreme alteration of wall rocks within a shear zone which may occur in sediments, andesites, trachytes and basalts.

Composition

Mineral Content

Olivine, Plagioclase, Pyroxene

Clay Minerals, Pyrite, Quartz, Sulfides

Compound Content

Aluminium Oxide, MgO, Silicon Dioxide

NaCl, CaO, Carbon Dioxide, Magnesium Carbonate, MgO

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Coastal Erosion, Sea Erosion, Water Erosion

Properties

Physical Properties

Hardness

3-43.5-4

1 7

👆🏻

Grain Size

Fine to Medium Grained

Medium to Fine Coarse Grained

Fracture

Conchoidal

Streak

Bluish Black

White

Porosity

Less Porous

Luster

Grainy, Pearly and Vitreous

Vitreous and Pearly

Compressive Strength

200.00 N/mm²140.00 N/mm²

0.15 450

👆🏻

Cleavage

Perfect

Toughness

Specific Gravity

-99992.8-3

0 8.4

👆🏻

Transparency

Opaque

Transparent to Translucent

Density

-9999 g/cm³2.8-2.9 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.92 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia

China, India

Africa

Ethiopia, Somalia, South Africa

Morocco, Namibia

Europe

Iceland

Austria, Italy, Romania, Spain, Switzerland

Others

Deposits in Western Continents

North America

Canada, USA

Mexico, USA

South America

Brazil

Brazil, Colombia

Deposits in Oceania Continent

Australia

New South Wales, Queensland, Yorke Peninsula

All about Adakite and Jasperoid Properties

Know all about Adakite and Jasperoid properties here. All properties of rocks are important as they define the type of rock and its application. Adakite belongs to Igneous Rocks while Jasperoid belongs to Sedimentary Rocks.Texture of Adakite is Porphyritic whereas that of Jasperoid is Earthy. Adakite appears Dull and Soft and Jasperoid appears Glassy or Pearly. The luster of Adakite is grainy, pearly and vitreous while that of Jasperoid is vitreous and pearly. Adakite is available in black, brown, light to dark grey colors whereas Jasperoid is available in black, brown, green, grey, pink, white colors. The commercial uses of Adakite are commemorative tablets, pottery, used in aquariums and that of Jasperoid are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo).