Anorthosite

Taconite

Anorthosite and Taconite

Anorthosite

Taconite

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Definition

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

Taconite is a low-grade iron ore which belongs to sedimentary rock and containing about 27% iron and 51% silica

History

Origin

Western Australia, Minnesota

Discoverer

Unknown

Newton Horace Winchell

Etymology

From French anorthose plagioclase + -ite1

From the name of Taconic Mountains in New England

Class

Igneous Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Plutonic

Other Categories

Coarse Grained Rock, Opaque Rock

Texture

Foliated, Glassy

Banded, Trellis

Color

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

Red, Reddish Brown

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Layered, Banded, Veined and Shiny

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

As Building Stone, Garden Decoration, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cement Manufacture, for Road Aggregate

As Dimension Stone, Used for flooring, stair treads, borders and window sills.

Medical Industry

Antiquity Uses

Artifacts, Sculpture, Small Figurines

Artifacts

Other Uses

Commercial Uses

Creating Artwork, Curling

As a touchstone, Cemetery Markers, Creating Artwork

Types

Proterozoic Anorthosite and Archean Anorthosite

Iron formation

Features

Generally rough to touch, Is one of the oldest rock

Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

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.

Taconite is a type of sedimentary rock formed when a river carries or transports pieces of broken rock as it flows. When the river reaches a lake or sea, its load of transported rocks settles or deposits at the bottom of sea or lake.

Composition

Mineral Content

Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene

Hematite, Magnetite, Quartz

Compound Content

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

Fe, Iron(III) Oxide, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering

Biological Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Wind Erosion

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

Properties

Physical Properties

Hardness

5-65.5-6

1 7

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Grain Size

Coarse Grained

Large and Coarse Grained

Fracture

Irregular

Uneven, Splintery or Conchoidal

Streak

White

Porosity

Less Porous

Highly Porous

Luster

Pearly to Subvitreous

Earthy

Compressive Strength

180.00 N/mm²190.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

1.5

Specific Gravity

2.62-2.825-5.3

0 8.4

👆🏻

Transparency

Translucent

Translucent to Opaque

Density

2.7-4 g/cm³-9999 g/cm³

0 1400

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Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K3.20 kJ/Kg K

0.14 3.2

👆🏻

Resistance

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

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Iran, Iraq, Oman, Russia, Saudi Arabia, Taiwan, Thailand, Vietnam

Africa

Kenya, Morocco, South Africa, Tanzania

Europe

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

Austria, France, Greece, Italy, Malta, Poland, Portugal, Serbia, Spain, Sweden, United Kingdom

Others

Greenland, Mid-Atlantic Ridge

Deposits in Western Continents

North America

Canada

Canada, Mexico, USA

South America

Bolivia, Colombia

Bolivia, Brazil

Deposits in Oceania Continent

Australia

Central Australia, South Australia, Western Australia

New South Wales, Queensland, South Australia, Western Australia

All about Anorthosite and Taconite Properties

Know all about Anorthosite and Taconite properties here. All properties of rocks are important as they define the type of rock and its application. Anorthosite belongs to Igneous Rocks while Taconite belongs to Sedimentary Rocks.Texture of Anorthosite is Foliated, Glassy whereas that of Taconite is Banded, Trellis. Anorthosite appears Layered, Banded, Veined and Shiny and Taconite appears Layered, Banded, Veined and Shiny. The luster of Anorthosite is pearly to subvitreous while that of Taconite is earthy. Anorthosite is available in black, bluish - grey, brown, green, grey, light greenish grey, pink, white colors whereas Taconite is available in red, reddish brown colors. The commercial uses of Anorthosite are creating artwork, curling and that of Taconite are as a touchstone, cemetery markers, creating artwork.