Picrite

Cataclasite

Picrite and Cataclasite

Picrite

Cataclasite

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Definition

Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine

Cataclasite is a type of cataclastic rock that is formed by fracturing and comminution during faulting. It is normally cohesive and non-foliated, consisting of angular clasts in a finer-grained matrix

History

Origin

Hawaii Islands

Swiss Alps, Europe

Discoverer

Unknown

Michael Tellinger

Etymology

From Greek pikros bitter + -ite, 19th century

From the Italian word cataclasi

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

Texture

Earthy, Rough

Clastic

Color

Black, Brown, Green, Grey, Pink, White, Yellow

Brown, Green, White, Yellow

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Rough and Shiny

Dull and Banded

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Homes, Interior Decoration

Decorative Aggregates, Homes

Exterior Uses

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

As Building Stone, As Facing Stone, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

As a Sintering Agent in Steel Industry to process Iron Ore, Cement Manufacture, for Road Aggregate, Manufacture of Magnesium and Dolomite Refractories, Roadstone, Used for flooring, stair treads, borders and window sills.

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts

Other Uses

Commercial Uses

As a Feed Additive for Livestock, As armour rock for sea walls, Metallurgical Flux, Pottery, Source of Magnesia (MgO)

Commemorative Tablets, Creating Artwork

Types

Oceanite

Protocataclasite, Mesocataclasite, Ultracataclasite and Foliated cataclasite

Features

Host Rock for Lead

Easily splits into thin plates, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Picrite 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.

Cataclasiste rocks mainly form by pressure deep under the Earth's surface, from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

Composition

Mineral Content

Biotite, Olivine, Plagioclase, Pyrrhotite

Albite, Apatite, Augite, Biotite, Calcite, Enstatite, Epidote, Feldspar, Micas, Muscovite or Illite, Pyroxene, Quartz

Compound Content

Al, CaO, Carbon Dioxide, Mg, MgO

Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering

Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

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

Coastal Erosion, Wind Erosion

Properties

Physical Properties

Hardness

6.83-4

1 7

👆🏻

Grain Size

Fine Grained

Fracture

Uneven

Streak

White, Greenish White or Grey

Black

Porosity

Less Porous

Luster

Subvitreous to Dull

Vitreous

Compressive Strength

189.00 N/mm²50.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

2.1

Specific Gravity

2.75-2.922.1

0 8.4

👆🏻

Transparency

Opaque

Translucent to Opaque

Density

1.5-2.5 g/cm³2.9-3.1 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.88 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia

China, India, Russia, Saudi Arabia, South Korea

Africa

South Africa

Egypt, Ethiopia, Kenya, Madagascar, Morocco, South Africa

Europe

Iceland

England, Finland, France, Spain, United Kingdom

Others

Deposits in Western Continents

North America

Canada, USA

South America

Brazil

Argentina, Colombia

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

All about Picrite and Cataclasite Properties

Know all about Picrite and Cataclasite properties here. All properties of rocks are important as they define the type of rock and its application. Picrite belongs to Igneous Rocks while Cataclasite belongs to Metamorphic Rocks.Texture of Picrite is Earthy, Rough whereas that of Cataclasite is Clastic. Picrite appears Rough and Shiny and Cataclasite appears Dull and Banded. The luster of Picrite is subvitreous to dull while that of Cataclasite is vitreous. Picrite and Cataclasite are available in black, brown, green, grey, pink, white, yellow colors. The commercial uses of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo) and that of Cataclasite are commemorative tablets, creating artwork.