Pseudotachylite

Diabase

Pseudotachylite and Diabase

Pseudotachylite

Diabase

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1 Definition

1.1 Definition

Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.

Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar

1.2 History

1.2.1 Origin

USA

Germany

1.2.2 Discoverer

Unknown

Christian Leopold von Buch

1.3 Etymology

From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.

From Greek di + base

1.4 Class

Metamorphic Rocks

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Not Applicable

Volcanic

1.6 Other Categories

Fine Grained Rock, Opaque Rock

Fine Grained Rock, Medium Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Quench

Aphanitic, Granular

2.2 Color

Black, Brown, Colourless, Green, Grey, Pink, White

Dark Grey to Black

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

Dull and Soft

Vesicular

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Entryways, Interior Decoration

Countertops, Decorative Aggregates, Homes, Interior Decoration, Kitchens

3.1.2 Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

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

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement

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

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Monuments

Artifacts, Monuments, Sculpture, Small Figurines

3.4 Other Uses

3.4.1 Commercial Uses

Creating Artwork, Gemstone

An Oil and Gas Reservoir, Cemetery Markers, Commemorative Tablets, Laboratory bench tops, Jewelry, Sea Defence, Tombstones

4 Types

4.1 Types

Not Available

4.2 Features

Host Rock for Lead

Smooth to touch

4.3 Archaeological Significance

4.3.1 Monuments

Used

4.3.2 Famous Monuments

Data Not Available

Stonehenge in English county of Wiltshire

4.3.3 Sculpture

Not Yet Used

Used

4.3.4 Famous Sculptures

Not Applicable

Data Not Available

4.3.5 Pictographs

Not Used

4.3.6 Petroglyphs

Not Used

4.3.7 Figurines

Not Yet Used

Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Pseudotachylite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

Diabase forms when molten igneous rock is squeezed up into a vertical crack in other rocks, the crack is usually forced apart and the molten rock cools in the space to form a tabular igneous intrusion cutting across the surrounding rocks and is known as a dike.

5.2 Composition

5.2.1 Mineral Content

Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides

Augite, Chlorite, Olivine, Plagioclase, Pyroxene, Pyrrhotite, Serpentine

5.2.2 Compound Content

Carbon Dioxide, Silicon Dioxide, Sulfur Dioxide, Sulphur

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

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Not Applicable

Biological Weathering, Chemical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Not Applicable

Chemical Erosion, Coastal Erosion, Water Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

1 7

6.1.2 Grain Size

Very fine-grained

Fine to Medium Grained

6.1.3 Fracture

Uneven

Conchoidal

6.1.4 Streak

Light to dark brown

Black

6.1.5 Porosity

Less Porous

Highly Porous

6.1.6 Luster

Vitreous

Not Available

6.1.7 Compressive Strength

60.00 N/mm²225.00 N/mm²

0.15 450

6.1.8 Cleavage

Irregular

Not Available

6.1.9 Toughness

Not Available

1.6

6.1.10 Specific Gravity

2.46-2.862.86-2.87

0 8.4

6.1.11 Transparency

Transparent to Translucent

Opaque

6.1.12 Density

2.7-2.9 g/cm³2.7-3.3 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

0.92 kJ/Kg KNA

0.14 3.2

6.2.2 Resistance

Heat Resistant

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

South Korea

India

7.1.2 Africa

Western Africa

South Africa, Tanzania

7.1.3 Europe

Great Britain, Switzerland

Germany, Greece, Italy, Scotland, Turkey

7.1.4 Others

Not Yet Found

Antarctica, Greenland

7.2 Deposits in Western Continents

7.2.1 North America

Not Yet Found

Canada, USA

7.2.2 South America

Not Yet Found

Argentina, Brazil, Colombia, Venezuela

7.3 Deposits in Oceania Continent

7.3.1 Australia

Central Australia, Western Australia

Central Australia, New Zealand, Queensland, Western Australia

All about Pseudotachylite and Diabase Properties

Know all about Pseudotachylite and Diabase properties here. All properties of rocks are important as they define the type of rock and its application. Pseudotachylite belongs to Metamorphic Rocks while Diabase belongs to Igneous Rocks.Texture of Pseudotachylite is Quench whereas that of Diabase is Aphanitic, Granular. Pseudotachylite appears Dull and Soft and Diabase appears Vesicular. The luster of Pseudotachylite is vitreous while that of Diabase is not available. Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors whereas Diabase is available in dark grey to black colors. The commercial uses of Pseudotachylite are creating artwork, gemstone and that of Diabase are an oil and gas reservoir, cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.