Gossan

Larvikite

Gossan and Larvikite

Gossan

Larvikite

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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.

Larvikite is an igneous rock and a variety of monzonite, notable for the presence of thumbnail-sized crystals of feldspar

History

Origin

Indonesia

Larvik, Norway

Discoverer

Cornish Gossen

Unknown

Etymology

From Cornish gossen from gos, blood from Old Cornish guit

From the town of Larvik in Norway, where this type of igneous rock is found

Class

Metamorphic Rocks

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Plutonic

Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Rough, Sandy

Phaneritic

Color

Brown, Brown- Black, Gold, Green, Rust

Black, Brown, Light to Dark Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull and Banded

Shiny

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Interior Decoration

Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

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

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

Other Architectural Uses

Curbing

Industry

Construction Industry

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

Medical Industry

Antiquity Uses

Artifacts

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Gemstone

Cemetery Markers, Commemorative Tablets, Creating Artwork

Types

Translocated gossan and Leakage gossan

Quartz Monzonite, Syenite and Diorite

Features

Clasts are smooth to touch, Easily splits into thin plates

Available in lots of colors, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

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

Larvikite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

Composition

Mineral Content

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

Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon

Compound Content

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

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

Chemical Erosion

Properties

Physical Properties

Hardness

4-56-7

1 7

👆🏻

Grain Size

Fine to Medium Grained

Medium to Fine Coarse Grained

Fracture

Conchoidal

Streak

White to Grey

White

Porosity

Highly Porous

Less Porous

Luster

Metallic

Subvitreous to Dull

Compressive Strength

-310.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

Specific Gravity

2.02.8-3

0 8.4

👆🏻

Transparency

Opaque

Density

-9999 g/cm³2.9-2.91 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.24 kJ/Kg K0.92 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

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

Africa

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

Europe

Albania, France, Germany, Great Britain, United Kingdom

Bulgaria, England, Germany, Norway, Romania, Switzerland

Others

Deposits in Western Continents

North America

Canada, USA

USA

South America

Brazil, Colombia, Ecuador

Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Peru

Deposits in Oceania Continent

Australia

New South Wales, South Australia, Western Australia

New South Wales, New Zealand, Queensland, South Australia, Western Australia

All about Gossan and Larvikite Properties

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