Gossan

Jaspillite

Gossan and Jaspillite

Gossan

Jaspillite

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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.

Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks

History

Origin

Indonesia

Western Australia, Minnesota

Discoverer

Cornish Gossen

Unknown

Etymology

From Cornish gossen from gos, blood from Old Cornish guit

From Jaspilite (Mineral), a compact siliceous rock which resembles jasper

Class

Metamorphic Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Soft 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

Banded and Glassy

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Interior Decoration

Decorative Aggregates, Interior Decoration

Exterior Uses

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

As Facing Stone, Garden Decoration, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

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

As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories

Medical Industry

Antiquity Uses

Artifacts

Artifacts, Jewellery, Monuments

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Gemstone

Creating Artwork, Jewelry

Types

Translocated gossan and Leakage gossan

Algoma-type , Lake Superior-type and Superior-type

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.

Jaspillite is a type of sedimentary rock which is formed by the compaction and sedimentation of pieces of broken or weathered rocks and minerals.

Composition

Mineral Content

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

Coesite, Quartz, Sand

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, Chemical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion

Properties

Physical Properties

Hardness

4-53

1 7

👆🏻

Grain Size

Fine to Medium Grained

Large and Coarse Grained

Fracture

Conchoidal

Streak

White to Grey

White

Porosity

Highly Porous

Very Less Porous

Luster

Metallic

Earthy

Compressive Strength

-230.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

Specific Gravity

2.05.0-5.3

0 8.4

👆🏻

Transparency

Opaque

Translucent to Opaque

Density

-9999 g/cm³0-5.7 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, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

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

Russia

Africa

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

Europe

Albania, France, Germany, Great Britain, United Kingdom

Ukraine

Others

Deposits in Western Continents

North America

Canada, USA

South America

Brazil, Colombia, Ecuador

Brazil

Deposits in Oceania Continent

Australia

New South Wales, South Australia, Western Australia

Western Australia

All about Gossan and Jaspillite Properties

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