Boninite

Kimberlite

Boninite and Kimberlite

Boninite

Kimberlite

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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

Kimberlite is a rare, blue-tinged, coarse-grained intrusive igneous rock, which sometimes contains diamonds and is mostly found in South Africa and Siberia.

History

Origin

Japan

Kimberley, South Africa

Discoverer

Unknown

John W. Judd

Etymology

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

From Kimberley +‎ -ite, from the name of the South African town of Kimberley where the rock was first found.

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Fine Grained Rock, Opaque Rock

Texture

Aphanitic to Porphyritic

Porphyritic

Color

Bluish - Grey, Brown, Green, Grey

Black, Bluish - Grey, Brown, Dark Greenish - Grey, Green, Grey

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

Countertops, Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

Garden Decoration, Office Buildings

As Building Stone, Paving Stone, Garden Decoration

Other Architectural Uses

Curbing

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

Medical Industry

Taken as a Supplement for Calcium or Magnesium

Antiquity Uses

Artifacts

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

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

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

Types

Basalt

Basaltic Kimberlites and Micaceous Kimberlites

Features

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

Always found as volcanic pipes over deep continental crust, Host rock for Diamond, Is one of the oldest rock, Surfaces are often shiny

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.

Kimberlite is an igneous rock and is the main source of diamonds. Its formation takes place deep beneath the Earth’s surface between 150 to 450 kilometres, and are erupted rapidly and violently.

Composition

Mineral Content

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

Garnet, Olivine, Phlogopite, Pyroxene

Compound Content

Silicon Dioxide

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

76-7

1 7

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Grain Size

Fine Grained

Fine to Coarse Grained

Fracture

Uneven

Conchoidal

Streak

White

Porosity

Less Porous

Very Less Porous

Luster

Vitreous

Subvitreous to Dull

Compressive Strength

150.00 N/mm²260.00 N/mm²

0.15 450

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Cleavage

Conchoidal

Toughness

1.1

Specific Gravity

2.5-2.82.86-2.87

0 8.4

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Transparency

Opaque

Translucent to Opaque

Density

-9999 g/cm³2.95-2.96 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, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia

Russia

Africa

South Africa

Angola, Botswana, Cameroon, Ethiopia, South Africa

Europe

England, Finland, United Kingdom

England, Hungary, Iceland, United Kingdom

Others

Antarctica, Greenland

Antarctica

Deposits in Western Continents

North America

USA

Canada, USA

South America

Colombia, Uruguay

Argentina, Colombia, Ecuador

Deposits in Oceania Continent

Australia

New Zealand, Western Australia

New South Wales, New Zealand, South Australia, Western Australia

All about Boninite and Kimberlite Properties

Know all about Boninite and Kimberlite properties here. All properties of rocks are important as they define the type of rock and its application. Boninite and Kimberlite belong to Igneous Rocks.Texture of Boninite is Aphanitic to Porphyritic whereas that of Kimberlite is Porphyritic. Boninite appears Dull and Soft and Kimberlite appears Dull and Banded. The luster of Boninite is vitreous while that of Kimberlite is subvitreous to dull. Boninite is available in bluish - grey, brown, green, grey colors whereas Kimberlite is available in black, bluish - grey, brown, dark greenish - grey, green, grey 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 Kimberlite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo).