Tephrite

Vogesite

Tephrite and Vogesite

Tephrite

Vogesite

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1 Definition

1.1 Definition

Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock

Vogesite is a porphyritic alkaline igneous rock and is a variety of Lamprophyre which is dominated by essential amphibole, usually hornblende, and potassic feldspar

1.2 History

1.2.1 Origin

Germany

Unknown

1.2.3 Discoverer

Van Tooren

Unknown

1.3 Etymology

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

From the variety of Lamprophyre Greek lampros bright and shining + porphureos purple

1.4 Class

Igneous Rocks

1.4.2 Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

1.5 Family

1.5.1 Group

Volcanic

Plutonic

1.6 Other Categories

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

Coarse Grained Rock, Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Aphanitic to Porphyritic

Porphyritic

2.2 Color

Black, Brown, Colourless, Green, Grey, White

Black, Bluish - Grey, Brown, Dark Greenish - Grey, Green, Grey

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.4 Wind Resistant

✔ ✘

2.4.5 Acid Resistant

✔ ✘

2.5 Appearance

Vesicular

Dull, Banded and Foilated

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Flooring, Homes, Interior Decoration

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

3.1.2 Exterior Uses

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

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

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

Landscaping

As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories

3.2.2 Medical Industry

Not Yet Used

Taken as a Supplement for Calcium or Magnesium

3.3 Antiquity Uses

Artifacts, Sculpture

Artifacts, Monuments, Sculpture

3.4 Other Uses

3.4.1 Commercial Uses

Production of Lime, Soil Conditioner

An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux, Production of Lime, Soil Conditioner, Source of Magnesia (MgO)

4 Types

4.1 Types

Not Available

Minette, Alnoite, Camptonite, Monchiquite, Fourchite, Vogesite, Appinite and Spessartite

4.2 Features

Host Rock for Lead

Always found as volcanic pipes over deep continental crust, Host rock for Diamond, Is one of the oldest rock, Surfaces are often shiny

4.3 Archaeological Significance

4.3.1 Monuments

Not Yet Used

Used

4.3.2 Famous Monuments

Not Applicable

Data Not Available

4.3.3 Sculpture

Used

4.3.4 Famous Sculptures

Data Not Available

4.3.5 Pictographs

Not Used

Used

4.3.6 Petroglyphs

Not Used

Used

4.3.7 Figurines

Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

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.

Vogesite formation takes place deep beneath the Earth’s surface at around 150 to 450 kilometres, and are erupted rapidly and violently.

5.2 Composition

5.2.1 Mineral Content

Alkali feldspar, Nepheline, Plagioclase, Pyroxene

Amphibole, Carbonate, Garnet, Micas, Olivine, Phlogopite, Pyroxene

5.2.2 Compound Content

CaO, Carbon Dioxide, MgO, Silicon Dioxide

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

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism

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

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

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

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

6 Properties

6.1 Physical Properties

6.1.1 Hardness

6.55-6

1 7

6.1.5 Grain Size

Medium to Fine Coarse Grained

Fine to Coarse Grained

6.1.6 Fracture

Uneven

Conchoidal

6.1.7 Streak

Bluish Black

White

6.1.8 Porosity

Very Less Porous

6.1.9 Luster

Subvitreous to Dull

6.1.10 Compressive Strength

90.00 N/mm²NA

0.15 450

6.1.13 Cleavage

Crenulation and Pervasive

Conchoidal

6.1.14 Toughness

2.4

Not Available

6.1.15 Specific Gravity

2.862.86-2.87

0 8.4

6.2.2 Transparency

Opaque

Translucent to Opaque

6.2.3 Density

2.8-2.9 g/cm³2.95-2.96 g/cm³

0 1400

6.3 Thermal Properties

6.3.1 Specific Heat Capacity

0.92 kJ/Kg KNA

0.14 3.2

7.3.2 Resistance

Heat Resistant, Impact Resistant

8 Reserves

8.1 Deposits in Eastern Continents

8.1.1 Asia

Not Yet Found

Russia

8.1.2 Africa

Namibia, Uganda

Angola, Botswana, Cameroon, Ethiopia, South Africa

8.1.3 Europe

Germany, Hungary, Italy, Portugal, Spain

England, Hungary, Iceland, United Kingdom

8.1.4 Others

Not Yet Found

Antarctica, Greenland

8.2 Deposits in Western Continents

8.2.1 North America

USA

Canada, Mexico, USA

8.2.2 South America

Not Yet Found

Argentina, Colombia, Ecuador

8.3 Deposits in Oceania Continent

8.3.1 Australia

New Zealand, Western Australia

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

All about Tephrite and Vogesite Properties

Know all about Tephrite and Vogesite properties here. All properties of rocks are important as they define the type of rock and its application. Tephrite and Vogesite belong to Igneous Rocks.Texture of Tephrite is Aphanitic to Porphyritic whereas that of Vogesite is Porphyritic. Tephrite appears Vesicular and Vogesite appears Dull, Banded and Foilated. The luster of Tephrite and Vogesite is subvitreous to dull. Tephrite is available in black, brown, colourless, green, grey, white colors whereas Vogesite is available in black, bluish - grey, brown, dark greenish - grey, green, grey colors. The commercial uses of Tephrite are production of lime, soil conditioner and that of Vogesite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo).