Charnockite

Arkose

Charnockite and Arkose

Charnockite

Arkose

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Definition

Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar

Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar

History

Origin

Tamil Nadu, India

France

Discoverer

T. H. Holland

Alexandre Brongniart

Etymology

From Job Charnock, an administtrator of East India Company

From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones

Class

Igneous Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Hard Rock

Family

Group

Plutonic

Other Categories

Coarse Grained Rock, Opaque Rock

Texture

Granular

Clastic

Color

Black, Grey, Orange, Pink, White

Reddish Brown

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Veined or Pebbled

Rough and Dull

Uses

Architecture

Interior Uses

Bathrooms, Countertops, Decorative Aggregates, Entryways, Floor Tiles, Homes, Hotels, Kitchens, Stair Treads

Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Bridges, Paving Stone, Garden Decoration, Office Buildings, Resorts

Paving Stone, Office Buildings

Other Architectural Uses

Curbing

Whetstones

Industry

Construction Industry

As Dimension Stone

Cement Manufacture, Construction Aggregate, for Road Aggregate, Production of Glass and Ceramics, Raw material for the manufacture of mortar

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts, Sculpture, Small Figurines

Other Uses

Commercial Uses

Curling, Gemstone, Laboratory bench tops, Tombstones

In aquifers, Soil Conditioner, Source of Magnesia (MgO), Tombstones

Types

Enderbite

Arkose

Features

Available in Lots of Colors and Patterns, It is One of the Oldest, Strongest and Hardest Rock

Available in Lots of Colors and Patterns, Generally rough to touch, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

Formation

Charnockite is an intrusive igneous rock which is very hard and is formed due to weathering of existing rocks.

Arkose rock forms from the weathering of feldspar-rich igneous or metamorphic rock, most commonly granitic rocks, which are primarily composed of quartz and feldspar.

Composition

Mineral Content

Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz

Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz

Compound Content

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Contact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Coastal Erosion, Glacier Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

6-76-7

1 7

👆🏻

Grain Size

Coarse Grained

Fracture

Conchoidal

Streak

White

Porosity

Very Less Porous

Highly Porous

Luster

Dull

Compressive Strength

190.00 N/mm²80.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

Specific Gravity

-99990

0 8.4

👆🏻

Transparency

Opaque

Density

2.6 g/cm³-9999 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.78 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Wear Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

India

China, India, Kazakhstan, Mongolia, Russia, Uzbekistan

Africa

East Africa, Ethiopia, Madagascar, Morocco, Mozambique

Namibia, Nigeria, South Africa

Europe

Albania, Romania, Scotland, United Kingdom

Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom

Others

Greenland

Deposits in Western Continents

North America

USA

Canada, USA

South America

Brazil, Colombia, Venezuela

Brazil

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

New South Wales, New Zealand

All about Charnockite and Arkose Properties

Know all about Charnockite and Arkose properties here. All properties of rocks are important as they define the type of rock and its application. Charnockite belongs to Igneous Rocks while Arkose belongs to Sedimentary Rocks.Texture of Charnockite is Granular whereas that of Arkose is Clastic. Charnockite appears Veined or Pebbled and Arkose appears Rough and Dull. The luster of Charnockite is while that of Arkose is dull. Charnockite is available in black, grey, orange, pink, white colors whereas Arkose is available in reddish brown colors. The commercial uses of Charnockite are curling, gemstone, laboratory bench tops, tombstones and that of Arkose are in aquifers, soil conditioner, source of magnesia (mgo), tombstones.