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Picrite
Picrite

Tonalite
Tonalite



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Picrite vs Tonalite

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Definition

Definition

Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture

History

Origin

Hawaii Islands
Tonale, Italy

Discoverer

Unknown
Warren Hamilton

Etymology

From Greek pikros bitter + -ite, 19th century
From Tonale Pass, northern Italy, + -ite1

Class

Igneous Rocks
Igneous Rocks

Sub-Class

Durable Rock, Hard Rock
Durable Rock, Hard Rock

Family

Group

Volcanic
Plutonic

Other Categories

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

Texture

Texture

Earthy, Rough
Phaneritic

Color

Black, Brown, Green, Grey, Pink, White, Yellow
Black, Brown, Light to Dark Grey, White

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Rough and Shiny
Banded and Foilated

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Homes, Interior Decoration
Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Exterior Uses

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

Other Architectural Uses

Curbing
Curbing

Industry

Construction Industry

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

Medical Industry

-
-

Antiquity Uses

Artifacts, Monuments, Sculpture
Artifacts, Sculpture

Other Uses

Commercial Uses

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

Types

Types

Oceanite
Dacite

Features

Host Rock for Lead
Is one of the oldest rock, Typically speckled black and white.

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

Formation

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.
When alkali feldspar is extracted from granite, it changes to granitoid and later, it becomes tonalite with quartz as major mineral.

Composition

Mineral Content

Biotite, Olivine, Plagioclase, Pyrrhotite
Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Manganese Oxides, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon

Compound Content

Al, CaO, Carbon Dioxide, Mg, MgO
NaCl, CaO, MgO, Silicon Dioxide

Transformation

Metamorphism

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

Types of Weathering

Biological Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion

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

Properties

Physical Properties

Hardness

6.86-7
1 7
👆🏻

Grain Size

Fine Grained
Medium to Fine Coarse Grained

Fracture

Uneven
Conchoidal

Streak

White, Greenish White or Grey
Bluish Black

Porosity

Less Porous
Very Less Porous

Luster

Subvitreous to Dull
Subvitreous to Dull

Compressive Strength

189.00 N/mm2185.00 N/mm2
0.15 450
👆🏻

Cleavage

-
-

Toughness

2.1
2.1

Specific Gravity

2.75-2.922.86-3
0 8.4
👆🏻

Transparency

Opaque
Opaque

Density

1.5-2.5 g/cm32.73 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.88 kJ/Kg K0.92 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant
Heat Resistant, Pressure Resistant, Water Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia
-

Africa

South Africa
Egypt

Europe

Iceland
Finland, Germany, Italy, Romania, Sweden, Turkey

Others

-
-

Deposits in Western Continents

North America

Canada, USA
USA

South America

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

Deposits in Oceania Continent

Australia

-
New Zealand, South Australia, Western Australia

Picrite vs Tonalite 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 Picrite and Tonalite Reserves. Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine. Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture. 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 Picrite vs Tonalite information and Picrite vs Tonalite characteristics in the upcoming sections.

Picrite vs Tonalite 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. Picrite vs Tonalite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Picrite and Properties of Tonalite. Learn more about Picrite vs Tonalite in the next section. The interior uses of Picrite include Countertops, Decorative aggregates, Homes and Interior decoration whereas the interior uses of Tonalite include Decorative aggregates, Entryways, Flooring, Homes and Interior decoration. Due to some exceptional properties of Picrite and Tonalite, they have various applications in construction industry. The uses of Picrite in construction industry 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. and that of Tonalite include As dimension stone, Cement manufacture, Cobblestones, Construction aggregate, For road aggregate.

More about Picrite and Tonalite

Here you can know more about Picrite and Tonalite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Picrite and Tonalite consists of mineral content and compound content. The mineral content of Picrite includes Biotite, Olivine, Plagioclase, Pyrrhotite and mineral content of Tonalite includes Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Manganese Oxides, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon. You can also check out the list of all Igneous Rocks. When we have to compare Picrite vs Tonalite, the texture, color and appearance plays an important role in determining the type of rock. Picrite is available in black, brown, green, grey, pink, white, yellow colors whereas, Tonalite is available in black, brown, light to dark grey, white colors. Appearance of Picrite is Rough and Shiny and that of Tonalite is Banded and Foilated. Properties of rock is another aspect for Picrite vs Tonalite. The hardness of Picrite is 6.8 and that of Tonalite is 6-7. The types of Picrite are Oceanite whereas types of Tonalite are Dacite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Picrite is white, greenish white or grey while that of Tonalite is bluish black. The specific heat capacity of Picrite is 0.88 kJ/Kg K and that of Tonalite is 0.92 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Picrite is heat resistant whereas Tonalite is heat resistant, pressure resistant, water resistant.