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Gossan
Gossan

Picrite
Picrite



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Picrite

Gossan vs Picrite

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Definition

Definition

Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine

History

Origin

Indonesia
Hawaii Islands

Discoverer

Cornish Gossen
Unknown

Etymology

From Cornish gossen from gos, blood from Old Cornish guit
From Greek pikros bitter + -ite, 19th century

Class

Metamorphic Rocks
Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock

Family

Group

-
Volcanic

Other Categories

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

Texture

Texture

Rough, Sandy
Earthy, Rough

Color

Brown, Brown- Black, Gold, Green, Rust
Black, Brown, Green, Grey, Pink, White, Yellow

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Dull and Banded
Rough and Shiny

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Interior Decoration
Countertops, 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, Paving Stone

Other Architectural Uses

Curbing
Curbing

Industry

Construction Industry

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate
As a Sintering Agent in Steel Industry to process Iron Ore, Cement Manufacture, for Road Aggregate, Manufacture of Magnesium and Dolomite Refractories, Roadstone, Used for flooring, stair treads, borders and window sills.

Medical Industry

-
-

Antiquity Uses

Artifacts
Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Gemstone
As a Feed Additive for Livestock, As armour rock for sea walls, Metallurgical Flux, Pottery, Source of Magnesia (MgO)

Types

Types

Translocated gossan and Leakage gossan
Oceanite

Features

Clasts are smooth to touch, Easily splits into thin plates
Host Rock for Lead

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

Formation

Earth movements can cause rocks to be either deeply buried or squeezed and hence the rocks are heated and put under great pressure.
Picrite 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
Biotite, Olivine, Plagioclase, Pyrrhotite

Compound Content

Aluminium Oxide, CaO, Fe, FeO, Silicon Dioxide, Sulphur
Al, CaO, Carbon Dioxide, Mg, MgO

Transformation

Metamorphism

Types of Metamorphism

-
Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

Types of Weathering

-
Biological Weathering

Erosion

Types of Erosion

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

Properties

Physical Properties

Hardness

4-56.8
1 7
👆🏻

Grain Size

Fine to Medium Grained
Fine Grained

Fracture

Conchoidal
Uneven

Streak

White to Grey
White, Greenish White or Grey

Porosity

Highly Porous
Less Porous

Luster

Metallic
Subvitreous to Dull

Compressive Strength

-189.00 N/mm2
0.15 450
👆🏻

Cleavage

-
-

Toughness

-
2.1

Specific Gravity

2.02.75-2.92
0 8.4
👆🏻

Transparency

Opaque
Opaque

Density

-9999 g/cm31.5-2.5 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.24 kJ/Kg K0.88 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant
Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

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

Africa

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

Europe

Albania, France, Germany, Great Britain, United Kingdom
Iceland

Others

-
-

Deposits in Western Continents

North America

Canada, USA
Canada, USA

South America

Brazil, Colombia, Ecuador
Brazil

Deposits in Oceania Continent

Australia

New South Wales, South Australia, Western Australia
-

Gossan vs Picrite Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Gossan and Picrite Reserves. Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.. Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Gossan vs Picrite information and Gossan vs Picrite characteristics in the upcoming sections.

Gossan vs Picrite Characteristics

Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Gossan vs Picrite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Gossan and Properties of Picrite. Learn more about Gossan vs Picrite in the next section. The interior uses of Gossan include Countertops, Decorative aggregates and Interior decoration whereas the interior uses of Picrite include Countertops, Decorative aggregates, Homes and Interior decoration. Due to some exceptional properties of Gossan and Picrite, they have various applications in construction industry. The uses of Gossan in construction industry include As dimension stone, Cement manufacture, Construction aggregate, For road aggregate and that of Picrite include As a sintering agent in steel industry to process iron ore, Cement manufacture, For road aggregate, Manufacture of magnesium and dolomite refractories, Roadstone, Used for flooring, stair treads, borders and window sills..

More about Gossan and Picrite

Here you can know more about Gossan and Picrite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Gossan and Picrite consists of mineral content and compound content. The mineral content of Gossan includes Apatite, Augite, Biotite, Bronzite, Calcite, Chert, Epidote, Feldspar, Hornblende, Micas, Plagioclase, Pyroxene, Quartz, Sulfides, Zircon and mineral content of Picrite includes Biotite, Olivine, Plagioclase, Pyrrhotite. You can also check out the list of all Metamorphic Rocks. When we have to compare Gossan vs Picrite, the texture, color and appearance plays an important role in determining the type of rock. Gossan is available in brown, brown- black, gold, green, rust colors whereas, Picrite is available in black, brown, green, grey, pink, white, yellow colors. Appearance of Gossan is Dull and Banded and that of Picrite is Rough and Shiny. Properties of rock is another aspect for Gossan vs Picrite. The hardness of Gossan is 4-5 and that of Picrite is 6.8. The types of Gossan are Translocated gossan and Leakage gossan whereas types of Picrite are Oceanite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Gossan is white to grey while that of Picrite is white, greenish white or grey. The specific heat capacity of Gossan is 0.24 kJ/Kg K and that of Picrite is 0.88 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Gossan is heat resistant, impact resistant, pressure resistant whereas Picrite is heat resistant.