Dolomite

Blueschist

Dolomite and Blueschist

Dolomite

Blueschist

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Definition

Dolomite is a sedimentary rock containing more than 50 percent of the mineral dolomite by weight

Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature

History

Origin

Southern Alps, France

USA

Discoverer

Dolomieu

Edgar Bailey

Etymology

From French, from the name of Dolomieu (1750–1801), the French geologist who discovered the rock

From French schiste, Greek skhistos i.e. split

Class

Sedimentary Rocks

Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Other Categories

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

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Earthy

Foliated

Color

Black, Brown, Green, Grey, Pink, White

Blue, Bluish - Grey, Purple, Shades of Blue

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Glassy or Pearly

Dull and Banded

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Floor Tiles, Flooring, Homes, Hotels, Kitchens

Exterior Uses

Garden Decoration, Office Buildings

Other Architectural Uses

Industry

Construction Industry

As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Production of Glass and Ceramics, Serves as an Oil and Gas Reservoir rock

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

Medical Industry

Taken as a Supplement for Calcium or Magnesium

Antiquity Uses

Artifacts, Jewellery, Monuments, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

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

Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling, Tombstones

Types

Boninite and Jasperoid

Metamorphic rock

Features

Host Rock for Lead, Traps for subsurface fluids like Oil and Natural Gas., Zinc and Copper Deposits

Has High structural resistance against erosion and climate, Very fine grained rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Present

Absent

Formation

Dolomite rocks are originally deposited as calcite or aragonite rich limestone, but during diagenesis process, the calcite or aragonite is transformed into dolomite.

Blueschist forms due to the metamorphism of basalt and other rocks with similar composition at high pressures and low temperatures and approximately corresponding to a depth of 15 to 30 kilometers and 200 to 500 °C.

Composition

Mineral Content

Clay Minerals, Pyrite, Quartz, Sulfides

Albite, Chlorite, Epidote, Garnet, Glaucophane, Lawsonite, Muscovite or Illite, Quartz

Compound Content

NaCl, CaO, Carbon Dioxide, Magnesium Carbonate, MgO

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

3.5-43.5-4

1 7

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Grain Size

Medium to Fine Coarse Grained

Fine to Medium Grained

Fracture

Conchoidal

Streak

White

White to Grey

Porosity

Less Porous

Highly Porous

Luster

Vitreous and Pearly

Dull

Compressive Strength

140.00 N/mm²220.00 N/mm²

0.15 450

👆🏻

Cleavage

Perfect

Slaty

Toughness

1.5

Specific Gravity

2.8-33-3.2

0 8.4

👆🏻

Transparency

Transparent to Translucent

Opaque

Density

2.8-2.9 g/cm³2.8-2.9 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.92 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India

Japan, Turkey

Africa

Morocco, Namibia

Egypt, Ethiopia, South Africa

Europe

Austria, Italy, Romania, Spain, Switzerland

France, Greece, Iceland

Others

Deposits in Western Continents

North America

Mexico, USA

USA

South America

Brazil, Colombia

Deposits in Oceania Continent

Australia

New South Wales, Queensland, Yorke Peninsula

New Zealand

All about Dolomite and Blueschist Properties

Know all about Dolomite and Blueschist properties here. All properties of rocks are important as they define the type of rock and its application. Dolomite belongs to Sedimentary Rocks while Blueschist belongs to Metamorphic Rocks.Texture of Dolomite is Earthy whereas that of Blueschist is Foliated. Dolomite appears Glassy or Pearly and Blueschist appears Dull and Banded. The luster of Dolomite is vitreous and pearly while that of Blueschist is dull. Dolomite is available in black, brown, green, grey, pink, white colors whereas Blueschist is available in blue, bluish - grey, purple, shades of blue colors. The commercial uses of Dolomite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo) and that of Blueschist are cemetery markers, commemorative tablets, creating artwork, curling, tombstones.