Boninite

Pyroxenite

Boninite and Pyroxenite

Boninite

Pyroxenite

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1 Definition

1.1 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

Pyroxenite is a dark, greenish, granular intrusive igneous rock consisting mainly of pyroxenes and olivine

1.2 History

1.2.1 Origin

Japan

Unknown

1.2.2 Discoverer

Unknown

1.3 Etymology

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

From pyro- fire + Greek xenos stranger as the mineral group was new to igneous rocks

1.4 Class

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Volcanic

Plutonic

1.6 Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Aphanitic to Porphyritic

Clastic, Granular, Phaneritic, Porphyritic

2.2 Color

Bluish - Grey, Brown, Colourless, Green, Grey

Black to Grey, Bluish - Grey, Dark Greenish - Grey, Green, Light Greenish Grey

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.5 Wind Resistant

✔ ✘

2.4.7 Acid Resistant

✔ ✘

2.5 Appearance

Dull and Soft

Layered, Banded, Veined and Shiny

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Homes, Kitchens

Countertops, Decorative Aggregates, Interior Decoration, Kitchens

3.1.3 Exterior Uses

Garden Decoration, Office Buildings

As Building Stone, As Facing Stone

3.1.4 Other Architectural Uses

Not Yet Used

Curbing

3.2 Industry

3.2.1 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, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts

3.4 Other Uses

3.4.1 Commercial Uses

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

Cemetery Markers, Commemorative Tablets, Laboratory bench tops, Jewelry, Sea Defence, Tombstones

4 Types

4.1 Types

Not Available

Clinopyroxenites, Orthopyroxenites and Websterites

4.2 Features

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

Generally rough to touch, Host rock for Diamond, Is one of the oldest rock

4.3 Archaeological Significance

4.3.1 Monuments

Not Yet Used

4.3.2 Famous Monuments

Not Applicable

4.3.3 Sculpture

Not Yet Used

4.3.4 Famous Sculptures

Not Applicable

4.3.5 Pictographs

Not Used

4.3.6 Petroglyphs

Not Used

4.3.7 Figurines

Not Yet Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

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

Pyroxenites are ultramafic igneous rocks which are made up of minerals of the pyroxene group, such as augite and diopside, hypersthene, bronzite or enstatite.

5.2 Composition

5.2.1 Mineral Content

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

Amphibole, Augite, Bronzite, Chromite, Diopside, Enstatite, Garnet, Hornblende, Hypersthene, Magnetite, Pyroxene

5.2.2 Compound Content

Silicon Dioxide

Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

Burial Metamorphism, Impact Metamorphism, Regional Metamorphism

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.6 Erosion

✔ ✘

5.3.8 Types of Erosion

Chemical Erosion, Coastal Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion, Water Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

1 7

6.1.8 Grain Size

Fine Grained

Coarse Grained

6.1.9 Fracture

Uneven

6.1.10 Streak

White

White, Greenish White or Grey

6.1.11 Porosity

Less Porous

6.1.12 Luster

Vitreous

Dull to Vitreous to Submetallic

6.1.13 Compressive Strength

NANA

0.15 450

6.3.2 Cleavage

Not Available

Irregular

6.3.3 Toughness

1.1

Not Available

6.3.4 Specific Gravity

2.5-2.83.2-3.5

0 8.4

6.3.6 Transparency

Opaque

7.1.3 Density

Not Available3.1-3.6 g/cm³

0 1400

7.4 Thermal Properties

7.4.1 Specific Heat Capacity

NANA

0.14 3.2

7.4.2 Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Impact Resistant, Pressure Resistant, Wear Resistant

8 Reserves

8.1 Deposits in Eastern Continents

8.1.1 Asia

Not Available

India, Russia

8.1.2 Africa

South Africa

8.1.3 Europe

England, Finland, United Kingdom

Germany, Greece, Italy, Scotland, Turkey

8.1.4 Others

Antarctica, Greenland

Greenland

8.2 Deposits in Western Continents

8.2.1 North America

USA

Canada, USA

8.2.2 South America

Colombia, Uruguay

Brazil, Colombia, Venezuela

8.3 Deposits in Oceania Continent

8.3.1 Australia

New Zealand, Western Australia

New Zealand, Queensland

All about Boninite and Pyroxenite Properties

Know all about Boninite and Pyroxenite properties here. All properties of rocks are important as they define the type of rock and its application. Boninite and Pyroxenite belong to Igneous Rocks.Texture of Boninite is Aphanitic to Porphyritic whereas that of Pyroxenite is Clastic, Granular, Phaneritic, Porphyritic. Boninite appears Dull and Soft and Pyroxenite appears Layered, Banded, Veined and Shiny. The luster of Boninite is vitreous while that of Pyroxenite is dull to vitreous to submetallic. Boninite is available in bluish - grey, brown, colourless, green, grey colors whereas Pyroxenite is available in black to grey, bluish - grey, dark greenish - grey, green, light greenish 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 Pyroxenite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.