Whiteschist

Gossan

Whiteschist and Gossan

Whiteschist

Gossan

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Definition

Whiteschist is an uncommon rock type belonging to a class of metamorphic rock, this is formed at high-ultra-high pressures

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

History

Origin

Tasmania

Indonesia

Discoverer

Unknown

Cornish Gossen

Etymology

From French schiste, Greek skhistos i.e. split

From Cornish gossen from gos, blood from Old Cornish guit

Class

Metamorphic Rocks

Sub-Class

Durable Rock, Soft Rock

Durable Rock, Medium Hardness Rock

Family

Group

Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Foliated

Rough, Sandy

Color

Green, Grey, White

Brown, Brown- Black, Gold, Green, Rust

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Banded and Foilated

Dull and Banded

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Countertops, Decorative Aggregates, Interior Decoration

Exterior Uses

Garden Decoration, Paving Stone

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

Other Architectural Uses

Curbing

Industry

Construction Industry

for Road Aggregate

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

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts

Other Uses

Commercial Uses

Creating Artwork, Gemstone, Jewelry, Production of Lime

Cemetery Markers, Commemorative Tablets, Gemstone

Types

Translocated gossan and Leakage gossan

Features

High percentage of mica, Host Rock for Lead

Clasts are smooth to touch, Easily splits into thin plates

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Whiteschist is formed by dynamic metamorphism at high temperatures and pressures that aligns the grains of mica, hornblende and other elongated minerals into thin layers.

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

Composition

Mineral Content

Carbonate, Coesite, Quartz, Silica

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

Compound Content

CaO, Mg, MgO, Silicon Dioxide

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

Properties

Physical Properties

Hardness

1.54-5

1 7

👆🏻

Grain Size

Fine to Medium Grained

Fracture

Conchoidal

Streak

White

White to Grey

Porosity

Less Porous

Highly Porous

Luster

Subvitreous to Dull

Metallic

Compressive Strength

200.00 N/mm²-

0.15 450

👆🏻

Cleavage

Perfect

Toughness

Specific Gravity

2.862.0

0 8.4

👆🏻

Transparency

Opaque

Density

2.8-2.9 g/cm³-9999 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.92 kJ/Kg K0.24 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

Afghanistan, Bangladesh, Bhutan, China, India, Japan, Kazakhstan, Malaysia, Pakistan, Russia, Thailand, Turkey, Vietnam

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

Africa

Egypt, Ethiopia, Morocco, Nigeria, South Africa

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

Europe

Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland

Albania, France, Germany, Great Britain, United Kingdom

Others

Deposits in Western Continents

North America

Canada, Costa Rica, Cuba, Mexico, Panama, USA

Canada, USA

South America

Brazil, Colombia, Guyana

Brazil, Colombia, Ecuador

Deposits in Oceania Continent

Australia

New South Wales, New Zealand, Queensland

New South Wales, South Australia, Western Australia

All about Whiteschist and Gossan Properties

Know all about Whiteschist and Gossan properties here. All properties of rocks are important as they define the type of rock and its application. Whiteschist and Gossan belong to Metamorphic Rocks.Texture of Whiteschist is Foliated whereas that of Gossan is Rough, Sandy. Whiteschist appears Banded and Foilated and Gossan appears Dull and Banded. The luster of Whiteschist is subvitreous to dull while that of Gossan is metallic. Whiteschist is available in green, grey, white colors whereas Gossan is available in brown, brown- black, gold, green, rust colors. The commercial uses of Whiteschist are creating artwork, gemstone, jewelry, production of lime and that of Gossan are cemetery markers, commemorative tablets, gemstone.