Anorthosite

Diorite

Anorthosite and Diorite

Anorthosite

Diorite

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Definition

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

Diorite is a grey to dark-grey intermediate intrusive igneous rock composed principally of plagioclase feldspar,biotite, hornblende, and pyroxene

History

Origin

Discoverer

Unknown

Etymology

From French anorthose plagioclase + -ite1

From early 19th century coined in French, formed irregularly from Greek diorizein distinguish

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Plutonic

Other Categories

Coarse Grained Rock, Opaque Rock

Coarse Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Foliated, Glassy

Phaneritic

Color

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

Black, Brown, Light to Dark Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Layered, Banded, Veined and Shiny

Shiny

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration

Decorative Aggregates, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cement Manufacture, for Road Aggregate

As Dimension Stone, Cement Manufacture, Cobblestones, Construction Aggregate, for Road Aggregate

Medical Industry

Antiquity Uses

Artifacts, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Creating Artwork, Curling

Types

Proterozoic Anorthosite and Archean Anorthosite

Plagioclase Diorite and Quartz Diorite

Features

Generally rough to touch, Is one of the oldest rock

Typically speckled black and white.

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

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.

Diorite is a coarse-grained intrusive igneous rock which contains large interlocking and randomly oriented crystals and forms when molten lava does not reach the Earth’s surface and cools down in the Earth’s crust.

Composition

Mineral Content

Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene

Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon

Compound Content

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

Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion, Water Erosion

Properties

Physical Properties

Hardness

5-66-7

1 7

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Grain Size

Coarse Grained

Medium to Coarse Grained

Fracture

Irregular

Streak

White

Bluish Black

Porosity

Less Porous

Very Less Porous

Luster

Pearly to Subvitreous

Shiny

Compressive Strength

180.00 N/mm²225.00 N/mm²

0.15 450

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Cleavage

Toughness

2.1

Specific Gravity

2.62-2.822.8-3

0 8.4

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Transparency

Translucent

Opaque

Density

2.7-4 g/cm³2.8-3 g/cm³

0 1400

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Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

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

Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Africa

Egypt

Europe

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

Finland, Germany, Italy, Romania, Sweden, Turkey, United Kingdom

Others

Deposits in Western Continents

North America

Canada

USA

South America

Bolivia, Colombia

Argentina, Bolivia, Chile, Colombia, Ecuador, Peru

Deposits in Oceania Continent

Australia

Central Australia, South Australia, Western Australia

New Zealand, Western Australia

All about Anorthosite and Diorite Properties

Know all about Anorthosite and Diorite properties here. All properties of rocks are important as they define the type of rock and its application. Anorthosite and Diorite belong to Igneous Rocks.Texture of Anorthosite is Foliated, Glassy whereas that of Diorite is Phaneritic. Anorthosite appears Layered, Banded, Veined and Shiny and Diorite appears Shiny. The luster of Anorthosite is pearly to subvitreous while that of Diorite is shiny. Anorthosite is available in black, bluish - grey, brown, green, grey, light greenish grey, pink, white colors whereas Diorite is available in black, brown, light to dark grey, white colors. The commercial uses of Anorthosite and Diorite are creating artwork, curling.