Gossan

Taconite

Gossan and Taconite

Gossan

Taconite

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Definition

Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.

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

History

Origin

Indonesia

Western Australia, Minnesota

Discoverer

Cornish Gossen

Newton Horace Winchell

Etymology

From Cornish gossen from gos, blood from Old Cornish guit

From the name of Taconic Mountains in New England

Class

Metamorphic Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Rough, Sandy

Banded, Trellis

Color

Brown, Brown- Black, Gold, Green, Rust

Red, Reddish Brown

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull and Banded

Layered, Banded, Veined and Shiny

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Interior Decoration

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Exterior Uses

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

As Building Stone, Garden Decoration, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

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

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

Medical Industry

Antiquity Uses

Artifacts

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Gemstone

As a touchstone, Cemetery Markers, Creating Artwork

Types

Translocated gossan and Leakage gossan

Iron formation

Features

Clasts are smooth to touch, Easily splits into thin plates

Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

Formation

Earth movements can cause rocks to be either deeply buried or squeezed and hence the rocks are heated and put under great pressure.

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

Apatite, Augite, Biotite, Bronzite, Calcite, Chert, Epidote, Feldspar, Hornblende, Micas, Plagioclase, Pyroxene, Quartz, Sulfides, Zircon

Hematite, Magnetite, Quartz

Compound Content

Aluminium Oxide, CaO, Fe, FeO, Silicon Dioxide, Sulphur

Fe, Iron(III) Oxide, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

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

Properties

Physical Properties

Hardness

4-55.5-6

1 7

👆🏻

Grain Size

Fine to Medium Grained

Large and Coarse Grained

Fracture

Conchoidal

Uneven, Splintery or Conchoidal

Streak

White to Grey

White

Porosity

Highly Porous

Luster

Metallic

Earthy

Compressive Strength

-190.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

1.5

Specific Gravity

2.05-5.3

0 8.4

👆🏻

Transparency

Opaque

Translucent to Opaque

Density

-9999 g/cm³-9999 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.24 kJ/Kg K3.20 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Indonesia, Russia, Singapore, South Korea

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

Africa

Cape Verde, Ethiopia, Ghana, South Africa, Western Africa

Kenya, Morocco, South Africa, Tanzania

Europe

Albania, France, Germany, Great Britain, United Kingdom

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

Others

Greenland, Mid-Atlantic Ridge

Deposits in Western Continents

North America

Canada, USA

Canada, Mexico, USA

South America

Brazil, Colombia, Ecuador

Bolivia, Brazil

Deposits in Oceania Continent

Australia

New South Wales, South Australia, Western Australia

New South Wales, Queensland, South Australia, Western Australia

All about Gossan and Taconite Properties

Know all about Gossan and Taconite properties here. All properties of rocks are important as they define the type of rock and its application. Gossan belongs to Metamorphic Rocks while Taconite belongs to Sedimentary Rocks.Texture of Gossan is Rough, Sandy whereas that of Taconite is Banded, Trellis. Gossan appears Dull and Banded and Taconite appears Layered, Banded, Veined and Shiny. The luster of Gossan is metallic while that of Taconite is earthy. Gossan is available in brown, brown- black, gold, green, rust colors whereas Taconite is available in red, reddish brown colors. The commercial uses of Gossan are cemetery markers, commemorative tablets, gemstone and that of Taconite are as a touchstone, cemetery markers, creating artwork.