Picrite

Skarn

Picrite and Skarn

Picrite

Skarn

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1 Definition

1.1 Definition

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

Skarns are formed during regional or contact metamorphism and from a variety of metasomatic processes involving fluids of magmatic, metamorphic, and/or marine origin

1.2 History

1.2.1 Origin

Hawaii Islands

USA, Australia

1.2.2 Discoverer

Unknown

Tornebohm

1.3 Etymology

From Greek pikros bitter + -ite, 19th century

From an old Swedish mining term originally used to describe a type of silicate gangue or waste rock.

1.4 Class

Igneous Rocks

Metamorphic Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Volcanic

Not Applicable

1.6 Other Categories

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Earthy, Rough

Earthy, Mud-rich, Rough

2.2 Color

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

Black, Brown, Colourless, Green, Grey, White

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.4 Wind Resistant

✔ ✘

2.4.5 Acid Resistant

✔ ✘

2.5 Appearance

Rough and Shiny

Dull

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Countertops, Decorative Aggregates, Homes, Interior Decoration

Decorative Aggregates, Entryways, Interior Decoration

3.1.2 Exterior Uses

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

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 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 a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Gold and Silver production, Manufacture of Magnesium and Dolomite Refractories

3.2.2 Medical Industry

Not Yet Used

Not Applicable

3.3 Antiquity Uses

Artifacts, Monuments, Sculpture

3.4 Other Uses

3.4.1 Commercial Uses

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

Creating Artwork, Gemstone, Jewelry, Metallurgical Flux, Source of Magnesia (MgO)

4 Types

4.1 Types

Oceanite

Endoskarns

4.2 Features

Host Rock for Lead

Host Rock for Lead, Zinc and Copper Deposits

4.3 Archaeological Significance

4.3.1 Monuments

Used

4.3.2 Famous Monuments

Data Not Available

4.3.3 Sculpture

Used

4.3.4 Famous Sculptures

Data Not Available

4.3.5 Pictographs

Not Used

4.3.6 Petroglyphs

Not Used

4.3.7 Figurines

Used

4.4 Fossils

Absent

5 Formation

5.1 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.

Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Skarn is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

5.2 Composition

5.2.1 Mineral Content

Biotite, Olivine, Plagioclase, Pyrrhotite

Calcite, Enstatite, Epidote, Garnet, Magnetite, Pyroxene, Titanite

5.2.2 Compound Content

Al, CaO, Carbon Dioxide, Mg, MgO

Au, CaO, Carbon Dioxide, Cu, Fe, MgO

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism

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

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering

Not Applicable

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

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

Not Applicable

6 Properties

6.1 Physical Properties

6.1.1 Hardness

6.86.5

1 7

6.1.2 Grain Size

Fine Grained

6.1.3 Fracture

Uneven

Irregular

6.1.4 Streak

White, Greenish White or Grey

Light to dark brown

6.1.5 Porosity

Less Porous

6.1.6 Luster

Subvitreous to Dull

Waxy and Dull

6.1.7 Compressive Strength

189.00 N/mm²NA

0.15 450

6.1.8 Cleavage

Imperfect

Slaty

6.1.9 Toughness

2.1

2.4

6.1.10 Specific Gravity

2.75-2.922.86

0 8.4

6.1.11 Transparency

Opaque

6.1.12 Density

1.5-2.5 g/cm³2.8-2.9 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

0.88 kJ/Kg K0.92 kJ/Kg K

0.14 3.2

6.2.2 Resistance

Heat Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

India, Russia

China, India, Russia, Saudi Arabia, South Korea, Sri Lanka

7.1.2 Africa

South Africa

South Africa, Western Africa

7.1.3 Europe

Iceland

United Kingdom

7.1.4 Others

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

Canada, USA

Canada

7.2.2 South America

Brazil

Brazil, Colombia, Paraguay

7.3 Deposits in Oceania Continent

7.3.1 Australia

Not Yet Found

Central Australia, Western Australia

All about Picrite and Skarn Properties

Know all about Picrite and Skarn properties here. All properties of rocks are important as they define the type of rock and its application. Picrite belongs to Igneous Rocks while Skarn belongs to Metamorphic Rocks.Texture of Picrite is Earthy, Rough whereas that of Skarn is Earthy, Mud-rich, Rough. Picrite appears Rough and Shiny and Skarn appears Dull. The luster of Picrite is subvitreous to dull while that of Skarn is waxy and dull. Picrite and Skarn are available in black, brown, colourless, 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 Skarn are creating artwork, gemstone, jewelry, metallurgical flux, source of magnesia (mgo).