Anorthosite

Picrite

Anorthosite and Picrite

Anorthosite

Picrite

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1 Definition

1.1 Definition

Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase

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

1.2 History

1.2.1 Origin

Unknown

Hawaii Islands

1.1.1 Discoverer

Unknown

1.2 Etymology

From French anorthose plagioclase + -ite1

From Greek pikros bitter + -ite, 19th century

1.4 Class

Igneous Rocks

1.4.2 Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

1.6 Family

1.6.1 Group

Plutonic

Volcanic

1.8 Other Categories

Coarse Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Foliated, Glassy

Earthy, Rough

2.3 Color

Black, Bluish - Grey, Brown, Green, Grey, Light Greenish Grey, Pink, White

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

2.5 Maintenance

Less

3.1 Durability

Durable

3.3.1 Water Resistant

✔ ✘

81% Igneous Rocks Rocks have it !

✔ ✘

81% Igneous Rocks Rocks have it !

3.5.2 Scratch Resistant

✔ ✘

86% Igneous Rocks Rocks have it !

✔ ✘

86% Igneous Rocks Rocks have it !

3.5.4 Stain Resistant

✔ ✘

66% Igneous Rocks Rocks have it !

✔ ✘

66% Igneous Rocks Rocks have it !

3.5.6 Wind Resistant

✔ ✘

49% Igneous Rocks Rocks have it !

✔ ✘

49% Igneous Rocks Rocks have it !

3.5.8 Acid Resistant

✔ ✘

48% Igneous Rocks Rocks have it !

✔ ✘

48% Igneous Rocks Rocks have it !

3.6 Appearance

Layered, Banded, Veined and Shiny

Rough and Shiny

4 Uses

4.1 Architecture

4.1.1 Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration

Countertops, Decorative Aggregates, Homes, Interior Decoration

4.1.2 Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

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

4.2.1 Other Architectural Uses

Curbing

5.2 Industry

5.2.1 Construction Industry

As Dimension Stone, Cement Manufacture, for Road Aggregate

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.

5.2.3 Medical Industry

Not Yet Used

5.3 Antiquity Uses

Artifacts, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

5.5 Other Uses

5.5.2 Commercial Uses

Creating Artwork, Curling

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

6 Types

6.1 Types

Proterozoic Anorthosite and Archean Anorthosite

Oceanite

6.3 Features

Generally rough to touch, Is one of the oldest rock

Host Rock for Lead

6.5 Archaeological Significance

6.5.1 Monuments

Not Yet Used

Used

7.1.1 Famous Monuments

Not Applicable

Data Not Available

7.2.1 Sculpture

Used

7.3.2 Famous Sculptures

Not Applicable

Data Not Available

7.3.4 Pictographs

Not Used

7.3.6 Petroglyphs

Not Used

7.3.8 Figurines

Used

7.4 Fossils

Absent

8 Formation

8.1 Formation

Anorthosite is a phaneritic, intrusive igneous rock which is characterized by a predominance of plagioclase feldspar which is almost 90–100%, and a minimal mafic component.

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.

8.2 Composition

8.2.1 Mineral Content

Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene

Biotite, Olivine, Plagioclase, Pyrrhotite

8.3.1 Compound Content

Ca, CaO, Chromium(III) Oxide, MgO, Sulfur Trioxide

Al, CaO, Carbon Dioxide, Mg, MgO

9.2 Transformation

9.2.1 Metamorphism

✔ ✘

97% Igneous Rocks Rocks have it !

✔ ✘

97% Igneous Rocks Rocks have it !

9.4.2 Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism

9.4.3 Weathering

✔ ✘

99% Igneous Rocks Rocks have it !

✔ ✘

99% Igneous Rocks Rocks have it !

9.4.6 Types of Weathering

Biological Weathering

9.4.7 Erosion

✔ ✘

92% Igneous Rocks Rocks have it !

✔ ✘

92% Igneous Rocks Rocks have it !

9.4.10 Types of Erosion

Chemical Erosion, Wind Erosion

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

10 Properties

10.1 Physical Properties

10.1.1 Hardness

5-6

6.8

11.1.1 Grain Size

Coarse Grained

Fine Grained

11.1.3 Fracture

Irregular

Uneven

11.1.4 Streak

White

White, Greenish White or Grey

11.1.6 Porosity

Less Porous

11.1.8 Luster

Pearly to Subvitreous

Subvitreous to Dull

11.1.10 Compressive Strength

What Is Flint

⊕

▶

▼

Not Available

Rank: N/A (Overall)▶

189.00 N/mm²

Rank: 11 (Overall)▶

▲

What Is Obsidian

⊕

▶

175 (What Is Grani..)

◀ ▶ ADD ⊕

11.1.15 Cleavage

Irregular

Imperfect

11.1.17 Toughness

Not Available

2.1

11.1.19 Specific Gravity

2.62-2.82

2.75-2.92

11.1.21 Transparency

Translucent

Opaque

11.1.23 Density

2.7-4 g/cm³

1.5-2.5 g/cm³

11.3 Thermal Properties

11.3.1 Specific Heat Capacity

What Is Banded ..

⊕

▶

▼

0.84 kJ/Kg K

Rank: 15 (Overall)▶

0.88 kJ/Kg K

Rank: 13 (Overall)▶

▲

What Is Granulite

⊕

▶

1.09 (What Is Trave..)

◀ ▶ ADD ⊕

11.3.3 Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant

Heat Resistant

13 Reserves

13.1 Deposits in Eastern Continents

13.1.1 Asia

Not Yet Found

India, Russia

13.1.3 Africa

Not Yet Found

South Africa

13.1.5 Europe

Bulgaria, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Malta, Poland, Portugal, Romania, Slovenia, Spain, Sweden, The Czech Republic

Iceland

13.1.7 Others

Not Yet Found

13.3 Deposits in Western Continents

13.3.1 North America

Canada

Canada, USA

13.3.3 South America

Bolivia, Colombia

Brazil

13.5 Deposits in Oceania Continent

13.5.1 Australia

Central Australia, South Australia, Western Australia

Not Yet Found

All about Anorthosite and Picrite Properties

Know all about Anorthosite and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Anorthosite and Picrite belong to Igneous Rocks.Texture of Anorthosite is Foliated, Glassy whereas that of Picrite is Earthy, Rough. Anorthosite appears Layered, Banded, Veined and Shiny and Picrite appears Rough and Shiny. The luster of Anorthosite is pearly to subvitreous while that of Picrite is subvitreous to dull. Anorthosite is available in black, bluish - grey, brown, green, grey, light greenish grey, pink, white colors whereas Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors. The commercial uses of Anorthosite are creating artwork, curling and that of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo).