Troctolite and Tephrite

Troctolite

Tephrite

Definition

Troctolite is a mafic intrusive rock type. It consists essentially of major but variable amounts of olivine and calcic plagioclase along with minor pyroxene. It is an olivine-rich anorthosite, or a pyroxene-depleted relative of gabbro

Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock

History

Origin

Unknown

Germany

Discoverer

Christian Leopold von Buch

Van Tooren

Etymology

From German Troklotit, from Greek trōktēs, a marine fish (taken to be trout)

From Greek tephra, ashes from Indo-European base, to burn

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Family

Group

Plutonic

Volcanic

Other Categories

Coarse Grained Rock, Opaque Rock

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

Texture

Phaneritic

Aphanitic to Porphyritic

Color

Dark Grey to Black

Black, Brown, Colourless, Green, Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Yes

Wind Resistant

Yes

Acid Resistant

Yes

Appearance

Veined and Shiny

Vesicular

Uses

Architecture

Interior Uses

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

Decorative Aggregates, Flooring, Homes, Interior Decoration

Exterior Uses

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

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

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate

Landscaping

Medical Industry

Not Yet Used

Antiquity Uses

Artifacts, Jewellery, Monuments, Sculpture

Artifacts, Sculpture

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Laboratory bench tops, Jewelry, Sea Defence, Tombstones

Production of Lime, Soil Conditioner

Types

Not Available

Features

Smooth to touch

Host Rock for Lead

Archaeological Significance

Monuments

Used

Not Yet Used

Famous Monuments

Data Not Available

Not Applicable

Sculpture

Used

Famous Sculptures

Data Not Available

Pictographs

Not Used

Petroglyphs

Not Used

Figurines

Used

Fossils

Absent

Formation

Troctolite 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.

Tephrite 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

Augite, Olivine, Plagioclase, Pyroxene

Alkali feldspar, Nepheline, Plagioclase, Pyroxene

Compound Content

Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide

CaO, Carbon Dioxide, MgO, Silicon Dioxide

Transformation

Metamorphism

Yes

Types of Metamorphism

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

Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

Yes

Types of Weathering

Mechanical Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Yes

Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion

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

Properties

Physical Properties

Hardness

6.5

Grain Size

Coarse Grained

Medium to Fine Coarse Grained

Fracture

Conchoidal

Uneven

Streak

Black

Bluish Black

Porosity

Highly Porous

Very Less Porous

Luster

Not Available

Subvitreous to Dull

Compressive Strength

225.00 N/mm²

90.00 N/mm²

Cleavage

Not Available

Crenulation and Pervasive

Toughness

1.6

2.4

Specific Gravity

2.86-2.87

2.86

Transparency

Opaque

Density

2.7-3.3 g/cm³

2.8-2.9 g/cm³

Thermal Properties

Specific Heat Capacity

Not Available

0.92 kJ/Kg K

Resistance

Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia

Not Yet Found

Africa

South Africa

Namibia, Uganda

Europe

Germany, Greece, Italy, Scotland, Turkey

Germany, Hungary, Italy, Portugal, Spain

Others

Greenland

Not Yet Found

Deposits in Western Continents

North America

Canada, USA

USA

South America

Brazil, Colombia, Venezuela

Not Yet Found

Deposits in Oceania Continent

Australia

New Zealand, Queensland

New Zealand, Western Australia

Summary >>

<< Reserves

All about Troctolite and Tephrite Properties

Know all about Troctolite and Tephrite properties here. All properties of rocks are important as they define the type of rock and its application. Troctolite and Tephrite belong to Igneous Rocks.Texture of Troctolite is Phaneritic whereas that of Tephrite is Aphanitic to Porphyritic. Troctolite appears Veined and Shiny and Tephrite appears Vesicular. The luster of Troctolite is not available while that of Tephrite is subvitreous to dull. Troctolite is available in dark grey to black colors whereas Tephrite is available in black, brown, colourless, green, grey, white colors. The commercial uses of Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Tephrite are production of lime, soil conditioner.