Boninite

Blueschist

Boninite and Blueschist

Boninite

Blueschist

Add ⊕

Definition

Boninite is a mafic extrusive rock which is high in magnesium and silica content, formed in fore-arc environments, typically during the early stages of subduction

Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature

History

Origin

Japan

USA

Discoverer

Unknown

Edgar Bailey

Etymology

From its occurrence in the Izu-Bonin arc south of Japan

From French schiste, Greek skhistos i.e. split

Class

Igneous Rocks

Metamorphic Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Aphanitic to Porphyritic

Foliated

Color

Bluish - Grey, Brown, Green, Grey

Blue, Bluish - Grey, Purple, Shades of Blue

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull and Soft

Dull and Banded

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes, Kitchens

Floor Tiles, Flooring, Homes, Hotels, Kitchens

Exterior Uses

Garden Decoration, Office Buildings

Other Architectural Uses

Industry

Construction Industry

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

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

Medical Industry

Antiquity Uses

Artifacts

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

An Oil and Gas Reservoir, Cemetery Markers, Creating Artwork, Soil Conditioner, Source of Magnesia (MgO)

Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling, Tombstones

Types

Basalt

Metamorphic rock

Features

Available in Lots of Colors and Patterns, High Mg content, Is one of the oldest rock

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

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Boninite is a type of Igneous rock which is formed through the cooling and solidification of lava or existing rocks.

Blueschist forms due to the metamorphism of basalt and other rocks with similar composition at high pressures and low temperatures and approximately corresponding to a depth of 15 to 30 kilometers and 200 to 500 °C.

Composition

Mineral Content

Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite

Albite, Chlorite, Epidote, Garnet, Glaucophane, Lawsonite, Muscovite or Illite, Quartz

Compound Content

Silicon Dioxide

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering

Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

73.5-4

1 7

👆🏻

Grain Size

Fine Grained

Fine to Medium Grained

Fracture

Uneven

Conchoidal

Streak

White

White to Grey

Porosity

Less Porous

Highly Porous

Luster

Vitreous

Dull

Compressive Strength

150.00 N/mm²220.00 N/mm²

0.15 450

👆🏻

Cleavage

Slaty

Toughness

1.1

1.5

Specific Gravity

2.5-2.83-3.2

0 8.4

👆🏻

Transparency

Opaque

Density

-9999 g/cm³2.8-2.9 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

Japan, Turkey

Africa

South Africa

Egypt, Ethiopia, South Africa

Europe

England, Finland, United Kingdom

France, Greece, Iceland

Others

Antarctica, Greenland

Deposits in Western Continents

North America

USA

South America

Colombia, Uruguay

Deposits in Oceania Continent

Australia

New Zealand, Western Australia

New Zealand

All about Boninite and Blueschist Properties

Know all about Boninite and Blueschist properties here. All properties of rocks are important as they define the type of rock and its application. Boninite belongs to Igneous Rocks while Blueschist belongs to Metamorphic Rocks.Texture of Boninite is Aphanitic to Porphyritic whereas that of Blueschist is Foliated. Boninite appears Dull and Soft and Blueschist appears Dull and Banded. The luster of Boninite is vitreous while that of Blueschist is dull. Boninite is available in bluish - grey, brown, green, grey colors whereas Blueschist is available in blue, bluish - grey, purple, shades of blue colors. The commercial uses of Boninite are an oil and gas reservoir, cemetery markers, creating artwork, soil conditioner, source of magnesia (mgo) and that of Blueschist are cemetery markers, commemorative tablets, creating artwork, curling, tombstones.